Login or Register for FREE!
2012 Element 7 pool
598 / 600 questions need explanations
0.3% complete
All explanations are written and maintained by ordinary users like you! Please help us finish the explanations in this pool.
On an Inmarsat-C system an incoming EGC alarm sounds:
  • When first powered on and when receiving Distress traffic. (9% chose this)
  • When receiving Distress traffic and all of the BALD MSI messages. (5% chose this)
  • To draw the operator's attention to an unscheduled Distress or Urgency message. (77% chose this)
  • To indicate the loss of NCS CC sync -- preventing the reception of unscheduled EGC messages. (9% chose this)
Click here to add explanation
Which of the following situations would normally use the Urgency priority?
  • A crewmember falling over the side. (14% chose this)
  • A serious medical situation involving a crewmember with potential loss of life. (39% chose this)
  • An important meteorological warning concerning hazardous weather. (7% chose this)
  • A cargo shift or weather situation considered to be of greater hazard than would justify a Safety priority designation. (39% chose this)
Click here to add explanation
If the Watch Officer hears "PAN PAN" spoken 3 times it means:
  • A navigation or important meteorological warning should follow. (0% chose this)
  • The station is preparing to transmit a Safety message possibly concerning the safety of a mobile unit or person. (19% chose this)
  • None of these answers is correct. (62% chose this)
  • A mobile unit is in need of immediate assistance. (19% chose this)
Click here to add explanation
Transmission of a Distress alert by a station on behalf of another vessel actually in Distress should not occur:
  • When the mobile unit actually in Distress is not itself in a position to transmit the Distress alert. (3% chose this)
  • When the Master or responsible person on the mobile unit not in Distress so decides. (14% chose this)
  • When the responsible person at the Coast Station determines further help is necessary. (0% chose this)
  • When communications between the Distress vessel and a Coast station are already in progress. (83% chose this)
Click here to add explanation
DSC Relays of DSC Distress alerts received from other ships should be done?
  • Only when the original DSC call is not acknowledged and no follow-on Distress traffic has been heard. (75% chose this)
  • Only by Inmarsat-C TELEX with Distress priority conveying the follow-on Distress traffic that has been heard. (4% chose this)
  • Only by Inmarsat-B voice or TELEX with Distress priority if no follow-on Distress traffic has been heard. (4% chose this)
  • Preferably by MF/HF voice or TELEX directly to the RCC conveying the follow-on Distress traffic that has been heard. (17% chose this)
Click here to add explanation
When can routine communications be resumed when radio silence has been imposed?
  • Routine communications can resume after the Rescue Coordination Center transmits a message on the frequency or channel being used for emergency communications stating that such traffic has concluded. (93% chose this)
  • After determining that the frequency or channel appears to be no longer in use. (4% chose this)
  • After determining that geographic distance from the Distress situation will prohibit any other signal from interfering with emergency communications. (4% chose this)
  • If, in the master's opinion, communications on that frequency will interfere with emergency communications. (0% chose this)
Click here to add explanation
Under what condition would you not relay a DSC Distress alert?
  • If the mobile unit in Distress is incapable of further Distress alert communications. (3% chose this)
  • If no Coast Station/Mobile Unit acknowledgement of the alert is observed. (10% chose this)
  • No distress traffic has been heard and the DSC alert is unacknowledged via DSC. (10% chose this)
  • A coast station DSC acknowledgment of the original Distress alert was received by your vessel. (77% chose this)
Click here to add explanation
Your ship received a Distress relay from a coast station on DSC freq. 2187.5 kHz. What action should the watch officer take?
  • Retransmit the DSC call on 2187.5 kHz to other vessels in the vicinity to assist in SAR operations. (11% chose this)
  • Monitor 2182.0 kHz to determine if there are any genuine Distress communications. (85% chose this)
  • Transmit a voice "Mayday Relay" call on 2187.5 kHz to other vessels in the vicinity. (0% chose this)
  • Transmit a voice "Mayday Relay" call on 2182.0 kHz to other vessels in the vicinity. (4% chose this)
Click here to add explanation
Which of the following frequencies is designated for On-scene Distress and Safety communications?
  • 4209.5 kHz (28% chose this)
  • 2174.5 kHz (55% chose this)
  • 518.0 kHz (17% chose this)
  • 490.0 kHz (0% chose this)
Click here to add explanation
What is meant by the acronym "ECC" in a DSC message?
  • Every Cipher Counted (0% chose this)
  • Error Check Character (82% chose this)
  • Error Cannot Confirm (11% chose this)
  • Even Characters Counted (7% chose this)
Click here to add explanation
Which of the following steps should be taken, if possible, when the vessel must be abandoned because of a Distress situation?
  • Alert the U.S. Coast Guard by using the survival craft's portable Inmarsat unit. (0% chose this)
  • Program the SART and EPIRB to transmit the vessel's location and situation. (7% chose this)
  • No additional steps are needed as the SART and EPIRB will both automatically float free and operate properly. (7% chose this)
  • Secure the EPIRB to the survival craft and mount the SART in a position to maximize its elevation. (86% chose this)
Click here to add explanation
How many HF frequencies are available for DSC Distress related calls?
  • Five (59% chose this)
  • Four (14% chose this)
  • Two (17% chose this)
  • One (10% chose this)
Click here to add explanation
GMDSS vessels equipped for Sea Areas A2, A3 or A4 must maintain a continuous DSC watch on 2187.5 kHz.
  • Only in areas beyond Inmarsat coverage. (4% chose this)
  • Only outside of areas covered by VHF-DSC. (4% chose this)
  • At all times when underway. (92% chose this)
  • When directed to do so by a cognizant rescue authority. (0% chose this)
Click here to add explanation
What action should you take after sending a false Distress alert on 8 MHz?
  • Make an "ALL STATIONS" call on all 5 H.F. TELEX channels canceling the alert. (7% chose this)
  • Make a "MAYDAY" call on 8414.5 kHz canceling the alert. (4% chose this)
  • Make an "Urgency" call on 8614.0 kHz canceling the alert. (7% chose this)
  • Make an "ALL STATIONS" call on 8291.0 kHz canceling the alert. (81% chose this)
Click here to add explanation
What action should you take after sending a false Distress alert on 12577.0 kHz?
  • Make an "ALL STATIONS" call on the associated 12 MHz J3E frequency canceling the alert. (92% chose this)
  • No action is necessary. (0% chose this)
  • Make an "ALL STATIONS" call on all 5 H.F. TELEX frequencies canceling the alert. (0% chose this)
  • Send a message to the nearest RCC via Inmarsat canceling the alert. (8% chose this)
Click here to add explanation
For a MF/HF DSC Distress call which statement is false?
  • It always requests J3E Voice follow-on communications so other vessels can hear the Mayday. (39% chose this)
  • It will send the minimal necessary information using the "Distress Button" or "Distress Hot Key." (21% chose this)
  • It will send a more detailed Distress format if time permits and operator data entries are correctly performed. (14% chose this)
  • It does not contain all the information normally of interest in on-scene Distress communications. (25% chose this)
Click here to add explanation
What action should you take after sending a false Distress alert on MF?
  • Make a voice announcement to cancel the alert on 2187.5 kHz. (16% chose this)
  • Make a voice announcement to cancel the alert on 2182.0 kHz. (64% chose this)
  • Make a voice announcement to cancel the alert on 2174.5 kHz. (0% chose this)
  • Send another DSC alert and follow on with voice on 2182.0 kHz. (20% chose this)
Click here to add explanation
Which of the following situations would normally use the Voice designation "Securite"?
  • Messages concerning the Safety of Life At Sea (SOLAS). (8% chose this)
  • Messages containing information concerning the Safety of a mobile unit or person. (15% chose this)
  • Messages detailing important navigational warnings. (73% chose this)
  • Messages concerning On-scene communications. (4% chose this)
Click here to add explanation
Repetition of a DSC Distress call is normally automatic if not acknowledged after a delay of:
  • 2 - 5 minutes (20% chose this)
  • 10-15 minutes (8% chose this)
  • 1 - 2 minutes (8% chose this)
  • 3.5 - 4.5 minutes (64% chose this)
Click here to add explanation
How are normal working conditions restored after radio silence has been imposed?
  • All of these answers are correct. (20% chose this)
  • The Land Earth Station (LES) that imposed the radio silence must transmit a voice message on the Distress frequency stating "SILENCE FINI". (4% chose this)
  • The Public Correspondence Station (PCS) that imposed the radio silence must transmit a voice message on the Distress frequency stating "SILENCE FINI". (0% chose this)
  • The Rescue Coordination Center (RCC) that imposed the radio silence must transmit a voice message on the Distress frequency stating "SEELONCE FEENEE". (76% chose this)
Click here to add explanation
What is meant by the term "Seelonce Mayday"?
  • Stations remaining off the air to safeguard proprietary information. (8% chose this)
  • Stations not directly involved with the on-going Distress communications may not transmit on the Distress frequency or channel. (84% chose this)
  • Two three-minute silent periods, at 15 and 45 minutes after the hour that provide a transmitting "window" for distressed vessels to transmit Distress alerts using J3E. (4% chose this)
  • Communications on a Distress frequency or channel is banned for 24 hours following the cessation of the Distress traffic. (4% chose this)
Click here to add explanation
Which statement is true regarding Distress communications under GMDSS?
  • Distress communications by (SITOR) NBDP should be in the BFEC mode when in two-way communications with the Coast Guard or other coast radio stations. (0% chose this)
  • The Rescue Coordination Center may not appoint another station to coordinate Distress traffic relating to the incident. (0% chose this)
  • The Rescue Coordination Center (RCC) is responsible for controlling a search and rescue operation, will coordinate the Distress traffic relating to the incident and may appoint another station to manage the Distress traffic. (93% chose this)
  • Initial Distress communications by (SITOR) NBDP should be in the ARQ mode to broadcast them to the Coast Guard, other coast radio stations and other ship stations. (7% chose this)
Click here to add explanation
If a MF-DSC Distress alert is transmitted what frequency is used for follow-on voice transmission?
  • 2182.0 kHz (68% chose this)
  • 2760.0 kHz (0% chose this)
  • 2187.5 kHz (29% chose this)
  • 2174.5 kHz (4% chose this)
Click here to add explanation
What is the proper procedure to be followed upon receipt of a Distress alert transmitted by use of Digital Selective Calling techniques?
  • Set watch on the radiotelephone Distress and Safety frequency associated with the Distress and Safety calling frequency on which the Distress alert was received. (69% chose this)
  • Set watch on the DSC alerting frequency in the band of frequencies the alert was received. (21% chose this)
  • Set a continuous watch on VHF-FM Channel 13, 16 and DSC on Channel 70. (7% chose this)
  • Ship stations equipped with narrow-band direct-printing equipment should respond to the Distress alert as soon as practicable by this means. (3% chose this)
Click here to add explanation
What action should you take after sending a false Distress alert on MF?
  • Send another DSC alert on 2187.5 kHz. and follow on with voice on 2187.5 kHz. (16% chose this)
  • No action is necessary. (0% chose this)
  • Make a voice announcement to cancel the alert on 2182.0 kHz. (80% chose this)
  • Send a DSC alert on all 7 DSC frequencies and follow on voice on 2174.5 kHz. (4% chose this)
Click here to add explanation
If a GMDSS Radio Operator initiates a DSC Distress transmission but does not insert a message, what happens?
  • The transmission is aborted and an alarm sounds to indicate this data must be provided by the operator. (3% chose this)
  • The transmission is not initiated and "ERROR" is indicated on the display readout. (6% chose this)
  • The transmission will be made with "default" information provided automatically. (88% chose this)
  • The receiving station will poll the DSC unit of the vessel in Distress to download the necessary information. (3% chose this)
Click here to add explanation
DSC is used primarily to:
  • Receive weather warnings, navigational notices and other Maritime Safety Information. (0% chose this)
  • Transmit and receive Distress, Urgency and Safety alerts and routine calls to and from other ships and coast radio stations. (93% chose this)
  • Provide routine communications with the ship owner. (0% chose this)
  • Report ship's position to search-and-rescue authorities via satellite. (7% chose this)
Click here to add explanation
What is the proper format for a Distress follow on voice transmission? (3x is three times),
  • All Ships 3x, this is Ship's Name/Call Sign 3x, Ship's position, nature of distress and assistance requested. (0% chose this)
  • Mayday 3x, this is Ship's Name/Call Sign once, Ship's position, nature of distress and assistance requested. (29% chose this)
  • Mayday 3x, this is Ship's Name/Call Sign 3x, Ship's position, nature of distress and assistance requested. (67% chose this)
  • All Stations 3x, this is Ship's Name/Call Sign 3x, Ship's position, nature of distress and assistance requested. (5% chose this)
Click here to add explanation
The relay of DSC Distress alerts:
  • Can quickly overburden the GMDSS systems in the vicinity with improperly transmitted or inappropriately relayed DSC calls. (71% chose this)
  • Was not originally an intended function of the GMDSS system but now is the preferred method to notify an RCC. (0% chose this)
  • Remains the preferred method for passing Distress message traffic to an RCC or Coast Station. (14% chose this)
  • Should always be done immediately to ensure a Coast Station receives the DSC Distress Alert. (14% chose this)
Click here to add explanation
Your antenna tuner becomes totally inoperative. What would you do to obtain operation on 2 HF bands?
  • Without an operating antenna tuner, transmission is impossible. (0% chose this)
  • It is impossible to obtain operation on 2 different HF bands, without an operating antenna tuner. (0% chose this)
  • Bypass the antenna tuner and shorten the whip to 15 ft. (4% chose this)
  • Bypass the antenna tuner. Use a straight whip or wire antenna approximately 30 ft long. (96% chose this)
Click here to add explanation
What statement best describes demodulation?
  • Detuning the receiver to remove interfering signals. (6% chose this)
  • Extracting intelligence from the radio carrier signal. (84% chose this)
  • Removing atmospheric noise from the signal. (3% chose this)
  • Separating the TELEX signals from the voice signals. (6% chose this)
Click here to add explanation
How many frequencies are available under GMDSS for DSC Distress-related calls?
  • Six (22% chose this)
  • Seven (67% chose this)
  • Four (0% chose this)
  • Five (11% chose this)
Click here to add explanation
When placing a TELEX call to a Coast Station, you should always:
  • Choose the closest station. (27% chose this)
  • Tune the transmitter on another frequency. (0% chose this)
  • Wait until the coast station sends his traffic list. (0% chose this)
  • Make sure the frequency is not occupied with normal traffic. (73% chose this)
Click here to add explanation
Which functions may the holder of a GMDSS Radio Operator License NOT perform on the Inmarsat-C equipment?
  • Maintain the antenna clear of soot, paint, etc. (9% chose this)
  • Log-on, traffic and log-off functions. (4% chose this)
  • Entry of position data and selection of LES. (13% chose this)
  • Optimize performance by adjusting the transmitter EIRP. (74% chose this)
Click here to add explanation
Which of the following is a correctly formatted Inmarsat-B address for sending communications to a shoreside TELEX terminal number 440122 in the United Kingdom (TELEX country code 51)?
  • 51440122 (46% chose this)
  • (51)440122+ (0% chose this)
  • 51440122# (13% chose this)
  • 51440122+ (42% chose this)
Click here to add explanation
In an AM broadcast signal using voice:
  • Varying the amplitude of the carrier and employing both sidebands without the carrier. (8% chose this)
  • Varying only the amplitude of the carrier, depending on Double or Single-Sideband operations. (13% chose this)
  • Varying the amplitude of the carrier and employing both sidebands and the carrier. (29% chose this)
  • There is a carrier with constant amplitude and frequency with complex upper and lower sidebands varying in amplitude and frequency. (50% chose this)
Click here to add explanation
Which of the following is a correctly formatted Inmarsat-C address book entry for sending communications to a fax machine number 1424-8821-902 in the United Kingdom (voice country code 44)?
  • 44 1424-8821-902 (5% chose this)
  • 4414248821902# (35% chose this)
  • 44+ 14248821902+ (5% chose this)
  • 4414248821902 (55% chose this)
Click here to add explanation
Describing VHF transmissions as "line of sight" does not mean:
  • VHF communications are effective only with nearby stations within visual range of the bridge. (70% chose this)
  • Vessel antenna height will not affect the radius of propagation. (10% chose this)
  • The normal transmission range to a coast station is approximately is 10 NM. (10% chose this)
  • Coast station antenna height has no effect on the radius of transmission. (10% chose this)
Click here to add explanation
What sequence of ARQ codes matches the following: manual over, end of message text, end of connection to land destination terminal?
  • NNNN, KKKK, GA+ (0% chose this)
  • KKKK, DIRTLX, NNNN (10% chose this)
  • +?, NNNN, KKKK (70% chose this)
  • +?, . . . . ., BRK+ (20% chose this)
Click here to add explanation
Which statement is true regarding a vessel equipped with GMDSS equipment that will remain in Sea Area A1 at all times?
  • The vessel must be provided with a radio installation capable of initiating the transmission of ship-to-shore Distress alerting from the position from which the ship is normally navigated. (60% chose this)
  • VHF DSC alerting may be the sole means of Distress alerting. (24% chose this)
  • HF or MF DSC may satisfy the equipment requirement. (12% chose this)
  • HF SSB with 2182 kHz automatic alarm generator may satisfy the equipment requirement. (4% chose this)
Click here to add explanation
What should a GMDSS Radio Operator do if a NAVTEX warning message is received but it contains too many errors to be usable?
  • Do nothing. Vital NAVTEX messages will be repeated on the next scheduled broadcast. (83% chose this)
  • Contact the NAVAREA coordinator and request a repeat broadcast. (13% chose this)
  • Initiate a request for Category A, B, L and D messages. (4% chose this)
  • Listen to appropriate VHF weather channel for repeat warnings. (0% chose this)
Click here to add explanation
The proper sequence of emissions corresponding to the sequence SSB-Voice without carrier, USB-Voice with carrier, FM-Voice and SITOR (NBDP) TELEX is:
  • J3E, H3E, F3E, F1B. (81% chose this)
  • H3E, J3E, F3E, F1B. (0% chose this)
  • J3E, H3E, F1B, F3E. (15% chose this)
  • H3E, J3E, F1B, F3E. (4% chose this)
Click here to add explanation
Which of the following provides a unique automated system capable of addressing messages to pre-determined groups of ships or all vessels in both fixed and variable geographic areas?
  • NAVTEX (23% chose this)
  • AFRTS (3% chose this)
  • NAVAREAs (3% chose this)
  • EGC (71% chose this)
Click here to add explanation
How can rescue personnel detect that a SART is transmitting in the immediate vicinity?
  • The DSC unit will react to the SART's signal and respond with the two-tone auto alarm. (10% chose this)
  • The SART can provide an approximate location to within a two nautical mile radius, per IMO standards. (0% chose this)
  • The SART signal appears as a target which comes and goes; the effect of heavy swells on a SART. (3% chose this)
  • The SART's dots on the PPI will become arcs and then eventually become concentric circles. (86% chose this)
Click here to add explanation
Which statement is correct regarding a method that a vessel experiencing problems with shadowing of an Inmarsat-B (or F77) SES antenna by an on-board obstruction could use to attempt reliable communications?
  • Change course to remove the shadow. (96% chose this)
  • Change the Coast Station ID programming. (4% chose this)
  • Install a shadow correction filter. (0% chose this)
  • Switch from TELEX to voice mode. (0% chose this)
Click here to add explanation
What determines the spares and maintenance materials requirements for the SITOR (NBDP) equipment under GMDSS?
  • 47 CFR Part 80 (30% chose this)
  • IMO Circular "Equipment Spares". (4% chose this)
  • The recommendations of the manufacturer. (56% chose this)
  • The GMDSS Maintainer's requirements. (11% chose this)
Click here to add explanation
How is mutual interference on 518 kHz among NAVTEX stations avoided?
  • All stations transmit at the same time but stations are limited to daytime operation only to reduce the radius of propagation. (14% chose this)
  • Transmitter power is limited, station assignment codes are not shared by other NAVAREAS and stations alternate between daytime and nighttime operations. (3% chose this)
  • Transmissions scheduled on a time-sharing basis, power limited and station assignment codes are geographically separated. (72% chose this)
  • Station codes are not shared by other NAVAREAS, transmissions scheduled on a time-sharing basis and power is limited. (10% chose this)
Click here to add explanation
With an Inmarsat-C LES, how are messages routed to receiving stations?
  • All messages are forwarded via a store and forward network. (71% chose this)
  • Direct connections are made to the receiving stations via gateways. (4% chose this)
  • Intermediary stations are used to connect the sending station with the receiving station in a real-time mode. (8% chose this)
  • Messages are stored until the network is polled by the receiving station. (17% chose this)
Click here to add explanation
SafetyNETTM promulgates what type of information?
  • Traffic Lists (8% chose this)
  • News advisories (4% chose this)
  • MSI (81% chose this)
  • MARAD (8% chose this)
Click here to add explanation
If the vessel is within range of NAVTEX broadcasts and both the Inmarsat-C and the NAVTEX receiver are inoperative the GMDSS operator should:
  • Select 518 kHz ARQ TELEX on the MF/HF console to receive MSI. (23% chose this)
  • Request repairs of the Sat-C system and wait until within range of NAVTEX. (0% chose this)
  • Select 518 kHz FEC TELEX on the MF/HF console to receive MSI. (45% chose this)
  • Select an HF MSI frequency and ARQ TELEX mode to receive MSI. (32% chose this)
Click here to add explanation
What is the signal transmitted in J2B mode?
  • A full carrier and one sideband. (23% chose this)
  • A full carrier and two sidebands. (13% chose this)
  • An upper sideband of 2 alternating tones. (53% chose this)
  • An upper sideband of a single tone switched on and off. (10% chose this)
Click here to add explanation
To ensure effective HF communications, GMDSS operators should:
  • Employ the short rules of propagation selection or rely on previous successful communications as a guide. (78% chose this)
  • Disregard the short rules of propagation selection and try different bands until one works. (4% chose this)
  • Do not rely on previous successful communications on the selected frequency band - the ionosphere changes too rapidly and inconsistently. (17% chose this)
  • Rely on the equipment calculations of Optimum Usable Frequency. (0% chose this)
Click here to add explanation
The acronym SITOR (NBDP) stands for:
  • Simplified Telephony Over Radio (0% chose this)
  • Simplex TELEX Over Radio (81% chose this)
  • Simplified TELEX Over Radio (10% chose this)
  • Simplex Telephony Over Radio (10% chose this)
Click here to add explanation
Which mode of communication is possible through an Inmarsat-C SES?
  • SITOR (NBDP) (0% chose this)
  • Radiotelephone (6% chose this)
  • TELEX and e-mail (88% chose this)
  • DSC (6% chose this)
Click here to add explanation
Which of the following statements concerning SITOR (NBDP) communications is true?
  • ARQ transmissions are acknowledged by the Information Receiving Station only at the end of the message. (9% chose this)
  • ARQ transmissions are made in data groups consisting of three-character blocks. (64% chose this)
  • ARQ communications rely upon error correction by time diversity transmission and reception. (9% chose this)
  • Forward error correction is an interactive mode. (18% chose this)
Click here to add explanation
A MMSI 030346239 indicates what?
  • Group MMSI (57% chose this)
  • Inmarsat-C I.D. number (7% chose this)
  • Coast station (30% chose this)
  • Ship station (7% chose this)
Click here to add explanation
What action should always be taken before powering down an Inmarsat-C terminal or leaving one satellite footprint for another?
  • An Inmarsat-C system must never be powered down or mandatory MSI messages will be lost. (4% chose this)
  • Send a message to the NCS advising arrival in port or request the NCS log your terminal in with the new satellite. (0% chose this)
  • No action is required -- the terminal will automatically log in with the new satellite when the NCS common channel is detected or after power up. (15% chose this)
  • Log out with the current NCS to inform them you are off the air or to enable a proper log in procedure with the new satellite. (81% chose this)
Click here to add explanation
What is the purpose of the second I.D. in an Inmarsat-B or F77 SES?
  • To provide an alternate number which may be called if a busy signal is received by the calling party. (20% chose this)
  • To provide an additional speech path, which may be used to communicate while the first channel is engaged in active communications. (15% chose this)
  • To provide for an emergency working frequency. (10% chose this)
  • To provide an additional number which may be dedicated to computers, fax, etc. (55% chose this)
Click here to add explanation
All country codes which are transmitted by MF/HF SITOR (NBDP) are preceded by which character(s)?
  • 00 (26% chose this)
  • + (16% chose this)
  • 0 (58% chose this)
  • DIR (0% chose this)
Click here to add explanation
The best way to test the Inmarsat-C terminal is:
  • Send a message to a shore terminal and wait for confirmation. (9% chose this)
  • Send a message to another ship terminal. (0% chose this)
  • If the "Send" light flashes, proper operation has been confirmed. (3% chose this)
  • Compose and send a brief message to your own Inmarsat-C terminal. (88% chose this)
Click here to add explanation
Which of the following statements concerning maintenance requirements is false?
  • Compulsory vessels sailing in Sea Areas A1 and A2 must provide any one of the three maintenance options which are duplication of equipment, shore-based, or at-sea maintenance capability. (17% chose this)
  • Compulsory vessels sailing in Sea Areas A3 and A4 must provide any two of the three maintenance options which are duplication of equipment, shore-based, or at-sea maintenance capability. (4% chose this)
  • Equipment warranties do not satisfy GMDSS maintenance requirements. (13% chose this)
  • If shore-based maintenance is used, maintenance services do not have to be completed or performance verified unless the vessel will be sailing to a non-US port. (67% chose this)
Click here to add explanation
Which statement concerning Inmarsat-B and Inmarsat-C terminals is correct?
  • Both Inmarsat-B and Inmarsat-C units are subject to shadowing effects due to their omni-directional antennas. (9% chose this)
  • Both Inmarsat-B and Inmarsat-C units are subject to shadowing effects, but Inmarsat-B units have directional antennas. (73% chose this)
  • Both Inmarsat-B and Inmarsat-C units are subject to shadowing effects, but Inmarsat-C units have directional antennas. (9% chose this)
  • Both Inmarsat-B and Inmarsat-C units are subject to shadowing effects, due to their directional antennas. (9% chose this)
Click here to add explanation
What radar display changes indicate the correct approach to a SART and what care should be taken in a SAR situation?
  • The line of dots indicate the SART's position, the dots become increasing arcs as the distance to the SART lessens, rescuing vessels should increase speed to reach Distress more quickly. (4% chose this)
  • A line of dots on a radar screen rotates to indicate the SART's position along its line of bearing; rescuing vessels should steer for the center of the line of dots. (20% chose this)
  • The line of dots indicate the SART's position, the dots become increasing arcs as the distance to the SART lessens, rescuing vessels should reduce speed as the arcs get greater in degree. (52% chose this)
  • The line of dots indicate the SART's position, the dots become decreasing arcs as the distance to the SART lessens, rescuing vessels should reduce speed as the arcs lessen in degree. (24% chose this)
Click here to add explanation
Which of the following references should be consulted for information on the proper setup and use of GMDSS equipment?
  • ITU List of Equipment Operations. (0% chose this)
  • 47 CFR Part 80 Subpart W. (14% chose this)
  • Instructions are available through the Maritime Safety Information (MSI) system. (4% chose this)
  • The manufacturer's operating manuals. (82% chose this)
Click here to add explanation
Which of the following terms is defined as a back-up power source that provides power to radio installations for the purpose of conducting Distress and Safety communications when the vessel's main and emergency generators cannot?
  • Emergency Diesel Generator (EDG) (3% chose this)
  • Reserve Source of Energy (RSE) (97% chose this)
  • Reserve Source of Diesel Power (RSDP) (0% chose this)
  • Emergency Back-up Generator (EBG) (0% chose this)
Click here to add explanation
To send message traffic to an Internet address using an Inmarsat- C terminal -- what action would be required?
  • Select the recipient using the e-mail code from the address book (or manually select the code.) (31% chose this)
  • Insert the Internet address into the correct field when creating the message file. (31% chose this)
  • Select the recipient using the e-mail code into the DNID/ENID setup e-mail function. (19% chose this)
  • Insert the Internet address into the correct field of the System setup e-mail function. (19% chose this)
Click here to add explanation
Which Inmarsat Earth Stations could a vessel utilize for Inmarsat-B traffic if operating off the Pacific Coast of the United States and tracking the POR satellite?
  • Lakhdaria (Algeria), Yamaguchi (Japan) or Sentosa (Singapore). (0% chose this)
  • Southbury (USA), Burum (Netherlands), EIK (Norway). (16% chose this)
  • Kumsan (South Korea), Burum (Netherlands), or Nakhoda (Russia). (5% chose this)
  • Santa Paula (USA), Auckland (New Zealand) or Yamaguchi (Japan). (79% chose this)
Click here to add explanation
Properly formatted MF-HF DSC transmissions can request which of the following emissions for follow on communications?
  • J3E/H3E telex emissions (7% chose this)
  • F1B/J2B voice emissions (14% chose this)
  • J3E/F3E voice emissions (21% chose this)
  • J3E/H3E voice emissions (57% chose this)
Click here to add explanation
Which of the following is a functional or carriage requirement for compulsory vessels?
  • A compulsory vessel must carry at least two (2) FCC licensed GMDSS Radio Operators in all sea areas as well as a GMDSS Maintainer in sea areas A3 & A4. (17% chose this)
  • A compulsory vessel must satisfy certain equipment carriage requirements based on the intended sea area of operation. (55% chose this)
  • A compulsory vessel must be able to transmit and respond to Distress alerts and carry only one (1) FCC licensed GMDSS Radio Operator in sea areas A1 & A2. (17% chose this)
  • None of these answers are correct. (10% chose this)
Click here to add explanation
Which statement is true regarding the receipt and acknowledgement of actual Distress follow-on communications by GMDSS ship stations?
  • Ship stations in receipt of Distress alert should not defer acknowledgement for a short interval, so that receipt may be acknowledged by the coast station. (14% chose this)
  • A Coast station has the sole obligation to respond. A ship station should wait for the Coast station MMSI DSC Acknowledgment before taking action. If a Coast station has no response in 15 minutes the ship should DSC acknowledge and inform the RCC. (14% chose this)
  • A ship station that receives a Distress call from another vessel must, as soon as possible, inform the Master or person responsible for the ship of the contents of the Distress communications received. (73% chose this)
  • Alerts concerning navigational hazards are second only to Safety traffic. (0% chose this)
Click here to add explanation
Which system is most likely to be affected by atmospheric disturbances?
  • VHF DSC (16% chose this)
  • Inmarsat (8% chose this)
  • MF/HF radiotelephony (72% chose this)
  • SafetyNETTM (4% chose this)
Click here to add explanation
What signal is detected as originating from an AIS SART and how is the signal displayed?
  • An AIS SART signal is shown on any AIS receiver as a special MMSI-like coded symbol. (44% chose this)
  • The 3-cm radar reflections are converted to AIS signals and displayed on ECDIS/ARPA screens. (11% chose this)
  • An AIS SART transmits on AIS frequencies and the signals are converted to 3-cm radar targets for display on 3-cm radars. (19% chose this)
  • An AIS SART transmits on 9 GHz so that a 3-cm radar can display the signals. (26% chose this)
Click here to add explanation
Which of the following situations would normally use the Safety priority?
  • A scenario concerning an important navigational or meteorological warning. (84% chose this)
  • A serious medical situation involving a crewmember. (4% chose this)
  • A crewmember falling over the side. (4% chose this)
  • Important company communications involving weather routing. (8% chose this)
Click here to add explanation
Which of the following systems is least susceptible to fading or static interference?
  • HF SITOR (NBDP) (10% chose this)
  • MF-HF DSC Controller (3% chose this)
  • VHF ARQ (0% chose this)
  • Inmarsat (86% chose this)
Click here to add explanation
What is the signal transmitted in H3E mode?
  • Two sidebands, upper and lower. (6% chose this)
  • A reduced carrier and the lower sideband. (6% chose this)
  • A full carrier and the upper sideband. (71% chose this)
  • A full carrier and both upper and lower sidebands. (16% chose this)
Click here to add explanation
Which of the following modes of communications are available when using Inmarsat-C?
  • Fax reception (0% chose this)
  • TELEX and e-mail (79% chose this)
  • 14400 BPS Data (5% chose this)
  • Voice transmissions (16% chose this)
Click here to add explanation
In all cases, the transmit frequency of a MF/HF console DSC Distress alert:
  • Will always go out first on 2187.5 kHz. (15% chose this)
  • Depends upon operator DSC Call set up entries or manufacturer's defaults. (56% chose this)
  • Will go out on 8 MHz and 2 MHz and one other DSC Distress frequency. (26% chose this)
  • Will always go out first on 8414.5 kHz to ensure receipt by a coast station. (4% chose this)
Click here to add explanation
Which of the following is a correctly formatted Inmarsat-C address book entry for sending communications to a fax machine on a vessel's F77 terminal in the IOR?
  • 870763240864 (60% chose this)
  • 583442519372 (16% chose this)
  • 1870442519372 (8% chose this)
  • 870323500121 (16% chose this)
Click here to add explanation
Which of the following is a correctly formatted Inmarsat-C address book entry for sending communications to a fax machine number (045) 334-5678 in Japan (voice country code 81)?
  • 810453345678# (12% chose this)
  • 810453345678 (88% chose this)
  • 81(045)3345678 (0% chose this)
  • 81 (045) 334-5678 (0% chose this)
Click here to add explanation
A vessel is tracking the AOR-W satellite. To initiate an automatic ship-to-shore telephone contact to a shoreside party in the U.S. phone # 123-456-7890, via Southbury Earth Station, a valid Inmarsat operations/dialing sequence is?
  • Select LES 001# then dial 0011234567890# (59% chose this)
  • Select LES #002 then dial 11234567890# (5% chose this)
  • Select LES 104# then dial 11234567890+ (0% chose this)
  • Select LES 001+ then dial 123 4567890# (36% chose this)
Click here to add explanation
What is the equipment carriage requirement for survival craft under GMDSS?
  • At least three SCT units and two SARTs on every cargo ship between 300-500 gross tons and the same on all passenger ships regardless of tonnage. (14% chose this)
  • At least three SCT units and two SARTs on every passenger ship and cargo ships of 500 gross tons and upwards. (59% chose this)
  • At least two radar transponders must be carried on every cargo ship of 300-500 gross tons and two radar transponders (one for each side) of every passenger ship regardless of tonnage. (14% chose this)
  • All cargo vessels above 300 gross tons and every passenger ship regardless of tonnage must carry three SCT units and two SARTs. (14% chose this)
Click here to add explanation
What messages originate from registered information providers anywhere in the world and are broadcast to the appropriate ocean region via a LES?
  • SafetyNETTM messages (79% chose this)
  • AMVER broadcasts (0% chose this)
  • Urgency messages (0% chose this)
  • NAVTEX broadcasts (21% chose this)
Click here to add explanation
How many GMDSS radio maintainers must be carried aboard a compulsory vessel if the At-Sea maintenance method is used?
  • One regardless of sea area of operation. (62% chose this)
  • Two in Sea Areas A3 and A4. (17% chose this)
  • Two in Sea Area A1. (0% chose this)
  • None of these answers are correct. (21% chose this)
Click here to add explanation
Which of the following would best be used for visual detection of a distressed vessel?
  • A 9-GHz SART's beacon. (0% chose this)
  • An EPIRB's strobe light. (71% chose this)
  • A 121.5-MHz EPIRB beacon. (4% chose this)
  • A 406-MHz EPIRB beacon. (25% chose this)
Click here to add explanation
Upon receipt of SafetyNETTM messages of the Distress or Urgency category on the ship's EGC receiver, what action is required by the GMDSS Radio Operator?
  • Manually reset the alarm. (52% chose this)
  • No immediate action is required as an audible tone will be generated at the beginning and end of the transmission and a paper printout of the message will be generated. (26% chose this)
  • No immediate action is required by the operator since the transmission will be automatically acknowledged by the receiving vessel. (9% chose this)
  • A periodic alarm tone will be heard until the radio operator prints the message from the unit's memory. (13% chose this)
Click here to add explanation
Which of the following is a correctly formatted Inmarsat-C address book entry for sending TELEX communications to a vessel in the POR?
  • 582436559121 (57% chose this)
  • 870436559121 (13% chose this)
  • 582436559121+ (13% chose this)
  • 583436559121+ (17% chose this)
Click here to add explanation
Which GMDSS equipment is best suited to simultaneous long-range communications with an RCC/coast station and OSC vessels or SAR aircraft?
  • MF-HF SITOR (NBDP) transmitters using telex follow on frequencies. (14% chose this)
  • Inmarsat Signals routed via the RCC to the SAR vessels & aircraft under their control. (29% chose this)
  • VHF transmitters to reach SAR aircraft and OSC vessels as well as the RCC/coast station. (5% chose this)
  • MF-HF SSB transmitters using voice follow-on frequencies. (52% chose this)
Click here to add explanation
The NAVTEX message header contains the following?
  • The first letter (from A to Z) indicates the NAVTEX transmitting station. (63% chose this)
  • A two-digit number (01-99) indicates the NAVTEX message category. (16% chose this)
  • Message numbers include a date/time group, along with the transmitting station's numerical ID. (9% chose this)
  • None of these answers is correct. (13% chose this)
Click here to add explanation
What action would be the swiftest and most certain way to notify a RCC of a Distress situation aboard your vessel?
  • Compose a detailed Distress message and send it to the closest LES to optimize the SAR response. (8% chose this)
  • Confirm the information in the Distress Alert Message setup menu is correct and use the "hot-key" or Distress Message Generator function on your satellite terminal. (46% chose this)
  • Press all of the "hot keys" available in the GMDSS console to ensure the RCC is notified. (42% chose this)
  • Send a multi-frequency DSC alert to ensure the RCC is notified regardless of Ionospheric propagation conditions. (4% chose this)
Click here to add explanation
What services are available through Enhanced Group Calls?
  • Maritime Safety Information and vessel traffic lists. (19% chose this)
  • Hourly NOAA weather broadcasts from the NWS. (0% chose this)
  • Coastal weather broadcasts. (4% chose this)
  • Maritime Safety Information and messages to pre-defined groups of subscribers. (77% chose this)
Click here to add explanation
If the vessel is experiencing atmospheric interference with NAVTEX broadcasts, especially in the tropics, the GMDSS operator should:
  • Select one of the 8 HF MSI frequencies and set-up the transceiver in FEC TELEX mode. (56% chose this)
  • Select one of the 6 HF MSI frequencies and set-up the transceiver in ARQ TELEX mode. (11% chose this)
  • Select one of the 6 MF MSI frequencies and set-up the transceiver in FEC TELEX mode. (22% chose this)
  • Select the MF MSI frequency dedicated to tropical MSI and set-up the transceiver in FEC TELEX mode. (11% chose this)
Click here to add explanation
Which statement is false regarding the GMDSS requirement for ship sources of energy?
  • The reserve sources of energy need to supply independent MF and HF radio installations at the same time. (50% chose this)
  • At all times while the vessel is at sea, a sufficient supply of electrical energy to operate the radio installations and charge any batteries which may be part of the reserve source of energy is required. (14% chose this)
  • An uninterruptible power supply or other means of ensuring a continuous supply of electrical power to all GMDSS equipment that could be affected by normal variations and interruptions of ship's power is required. (14% chose this)
  • If a vessel's position is constantly required for the proper performance of a GMDSS station, provisions must be made to ensure position information is uninterrupted if the ship's source of main or emergency energy fails. (21% chose this)
Click here to add explanation
Which is true concerning a required watch on VHF Ch-16?
  • When a vessel is in an A1 sea area and subject to the Bridge-to-Bridge act and in a VTS system, a watch is required on Ch-16 in addition to both Ch-13 and the VTS channel. (30% chose this)
  • It is not compulsory at all times while at sea until further notice, unless the vessel is in a VTS system. (15% chose this)
  • When a vessel is in an A1 sea area and subject to the Bridge-to-Bridge act and in a VTS system, a watch is not required on Ch-16 provided the vessel monitors both Ch-13 and the VTS channel. (52% chose this)
  • It is not always compulsory in sea areas A2, A3 and A4. (4% chose this)
Click here to add explanation
The Urgency Priority should be used for:
  • Messages concerning the Safety of Life At Sea (SOLAS). (16% chose this)
  • Messages containing information concerning the Safety of a mobile unit or person. (60% chose this)
  • Messages detailing important navigational warnings. (16% chose this)
  • Messages concerning On-scene communications. (8% chose this)
Click here to add explanation
What action should be taken if a Distress alert is received on the 12 MHz DSC frequency?
  • Use DSC to acknowledge/relay the alert using the 12 MHz DSC frequency. (23% chose this)
  • Do nothing. Ship is too far away to render assistance. (3% chose this)
  • Set the transceiver to 12290.0 kHz simplex J3E emission. (63% chose this)
  • Set the transceiver to 12520.0 kHz simplex F1B/J2B emission. (10% chose this)
Click here to add explanation
Which of the following would indicate an Inmarsat-C terminal?
  • 436682011 (58% chose this)
  • 003662517 (8% chose this)
  • 325468325 (27% chose this)
  • 1500241 (8% chose this)
Click here to add explanation
Which device provides the best method to locate a ship in Distress or survival craft in the GMDSS?
  • Satellite EPIRBs (93% chose this)
  • Radio Direction Finder (4% chose this)
  • MF/HF DSC (0% chose this)
  • VHF homing device (4% chose this)
Click here to add explanation
A ship operating in sea area A-3 must have the following provisions for maintenance:
  • Duplication of Equipment. (17% chose this)
  • Shore Maintenance. (3% chose this)
  • Any two of these are required. (80% chose this)
  • At Sea Maintenance. (0% chose this)
Click here to add explanation
A DSC call is received from a station with a MMSI number of 003669991. What type of station made the call?
  • A vessel operating in Sea Area A3. (9% chose this)
  • A group ship station (23% chose this)
  • A U.S. coast station (64% chose this)
  • An Intercoastal vessel (5% chose this)
Click here to add explanation
The DIRTLX command should be given to a coast station at what point in time?
  • Immediately following the automatic exchange of answerbacks. (17% chose this)
  • After receipt of the Go Ahead indication following the automatic exchange of answerbacks. (46% chose this)
  • After receipt of the Go Ahead indication followed by the automatic exchange of answerbacks. (13% chose this)
  • Sent at the beginning of the message to request a direct TELEX connection. (25% chose this)
Click here to add explanation
Which of the following is true of SITOR (NBDP) Mode B (FEC), in the presence of static crashes.
  • FEC reduces the error rate by transmitting each character twice. (73% chose this)
  • Data flow rate depends on signal propagation. (5% chose this)
  • Idle characters are sent upon request. (5% chose this)
  • Transmitter and receiver cannot synchronize. (18% chose this)
Click here to add explanation
Which LES should a GMDSS Radio Operator select to update a Distress alert message if the vessel is in the southern Pacific Ocean near the Dateline?
  • Santa Paula (USA) or Beijing (PRC) would be the best choice depending on SAR jurisdiction. (21% chose this)
  • Kumsan (South Korea) or Sentosa (Singapore) would be the best choice depending on SAR jurisdiction. (8% chose this)
  • Yamaguchi (Japan) or Nakhoda (Russia) would be the best choice depending on SAR jurisdiction. (8% chose this)
  • Auckland (New Zealand) or Santa Paula (USA) would be the best choice depending on SAR jurisdiction. (63% chose this)
Click here to add explanation
Through which coast radio station(s) may a U.S.-flag merchant vessel communicate?
  • Any coast radio station in the world that is licensed to provide such communications. (62% chose this)
  • Any coast radio station in the world that is licensed to provide such communications, but prior authorization must be obtained for a U.S.-flag merchant vessel to communicate through a non-U.S. station. (38% chose this)
  • The U.S. Coast Guard coordinates the communications and assigns the working channel. (0% chose this)
  • U.S. flag ships are licensed to communicate only with U.S. coast radio stations. (0% chose this)
Click here to add explanation
An incoming DSC Distress alert on 8414.5 kHz will have what result?
  • The DSC controller will emit both an audible and visual alarm. (18% chose this)
  • The particulars of the alert may be printed out. (5% chose this)
  • The Distress information contained in the alert will be sent to the data directory. (9% chose this)
  • All of these answers would typically occur. (68% chose this)
Click here to add explanation
Much longer than normal VHF communications distances are typically caused by:
  • Changing power from 1W to 25 W. (29% chose this)
  • Skywave reflections from the D layer. (11% chose this)
  • Ionospheric activity in layers F1/F2. (0% chose this)
  • Atmospheric ducting or tropospheric propagation. (61% chose this)
Click here to add explanation
What is meant by describing a Coast Station with the acronym ATOR?
  • The station's BFEC operations are computerized and a rigid operating sequence must be followed correctly. (4% chose this)
  • The station will control all of the ARQ operations and it will generate the proper service request codes at the correct time in the sequence. (17% chose this)
  • The station's ARQ operations are computerized and a rigid operating sequence must be followed correctly. (26% chose this)
  • The station will control all of the ARQ operations and it will provide prompts for the operator to request time & charges at the correct time in the sequence. (52% chose this)
Click here to add explanation
Which piece of required GMDSS equipment is the primary source of transmitting locating signals?
  • Radio Direction Finder (RDF). (0% chose this)
  • Survival Craft Transceiver. (4% chose this)
  • An EPIRB transmitting on 406 MHz. (96% chose this)
  • A SART transmitting on 406 MHz. (0% chose this)
Click here to add explanation
A typical call sign for a large container ship under U. S. flag would be:
  • KBZY (84% chose this)
  • WBX1469 (4% chose this)
  • NADN (12% chose this)
  • KPH (0% chose this)
Click here to add explanation
To set-up the MF/HF Transceiver for a TELEX call to a coast station, the operator must:
  • Select J3E mode for proper SITOR (NBDP) operations. (13% chose this)
  • Select F1B/J2B modes or J3E mode, depending on whether ARQ or FEC is preferred. (26% chose this)
  • Select J3E mode for ARQ and H3E mode for FEC. (17% chose this)
  • Select F1B mode or J2B mode, depending on the equipment manufacturer. (43% chose this)
Click here to add explanation
Which statement is NOT true regarding the requirements of survival craft portable two-way VHF radiotelephone equipment?
  • Operation on Ch-16 (0% chose this)
  • Antenna must be permanently-affixed. (4% chose this)
  • Simplex (single frequency) voice communications only. (26% chose this)
  • Effective radiated power should be a minimum of 2.0 Watts. (70% chose this)
Click here to add explanation
What action should be taken on changing from one ocean region to another?
  • Power the system down and turn the power back on again. (9% chose this)
  • Manually realign the antenna. (4% chose this)
  • Log out of the current satellite and log in to the correct satellite. (74% chose this)
  • No action is required -- the unit will scan for another satellite and log in. (13% chose this)
Click here to add explanation
What is usually the first step for a GMDSS Radio Operator to take when initiating a Distress priority message via Inmarsat?
  • By pressing a "Distress Button" or "Distress Hot Key(s)" on the equipment. (85% chose this)
  • By dialing the correct code on the telephone remote unit. (0% chose this)
  • By contacting the LES operator and announcing a Distress condition is in existence. (0% chose this)
  • By contacting the LES operator using the radiotelephone Distress procedure "Mayday"... etc. (15% chose this)
Click here to add explanation
What information is not vital in a Distress follow on voice transmission after a DSC Alert?
  • Ship's position, nature of distress and assistance requested. (0% chose this)
  • Ship's Name, Call Sign and MMSI number. (3% chose this)
  • Physical description of the vessel and number of POB. (10% chose this)
  • Company emergency contact information. (86% chose this)
Click here to add explanation
Which of the following would indicate an Inmarsat-B terminal?
  • A 9 digit number beginning with the MID. (15% chose this)
  • A 9 digit number always starting with 3. (70% chose this)
  • A 7 digit number. (7% chose this)
  • A 9 digit number always starting with 4. (7% chose this)
Click here to add explanation
At what point does a SART begin transmitting?
  • It immediately begins radiating when placed in the "on" position. (4% chose this)
  • If it has been placed in the "on" position, it will respond when it has been interrogated by a 9-GHz radar signal. (85% chose this)
  • It must be manually activated or water activated before radiating. (8% chose this)
  • If it has been placed in the "on" position, it will begin transmitting immediately upon detecting that it is in water. (4% chose this)
Click here to add explanation
Which of these is not a primary purpose of the MF/HF DSC controller?
  • It provides for the electronic memory of incoming and outgoing DSC calls. (23% chose this)
  • It permits control of transceiver operations in response to an incoming DSC call. (14% chose this)
  • It provides for the formatting and transmission of outgoing DSC calls. (0% chose this)
  • It provides the scanning watch receiver capability on the 6 MF/HF DSC frequencies. (64% chose this)
Click here to add explanation
Which statement regarding GMDSS MF/HF Transceiver frequency set-up is true:
  • Manual keypad entries are quicker and more certain than using the database. (15% chose this)
  • All consoles ensure that manual keypad entries are checked for legal outcomes. (8% chose this)
  • All consoles ensure that ITU channel recall from a database produces accurate and legal outcomes. (19% chose this)
  • Using the manufacturer's database typically produces a more swift and certain result. (58% chose this)
Click here to add explanation
What is the channel spacing for authorized F1B/J2B frequencies?
  • 170 Hz (7% chose this)
  • 300 Hz (3% chose this)
  • 3.0 kHz (30% chose this)
  • 500 Hz (60% chose this)
Click here to add explanation
What system can provide an automated service in coastal waters where it may not be feasible to establish the NAVTEX service or where shipping density is too low to warrant its implementation?
  • AMVER (8% chose this)
  • SafetyNETTM (72% chose this)
  • VHF DSC (0% chose this)
  • ARQ SITOR (NBDP) (20% chose this)
Click here to add explanation
Which of the following would most likely not prevent a SART's signal from being detected?
  • The rescue personnel were monitoring the 3-CM radar and the SART was mounted improperly in the lifeboat. (4% chose this)
  • The SART was mounted improperly in the survival craft and rescue personnel were monitoring the 10-CM radar. (11% chose this)
  • The rescue personnel were monitoring the 10-CM radar and the SART was properly mounted in the lifeboat. (15% chose this)
  • The SART was properly mounted in the lifeboat and rescue personnel were monitoring the 3-CM radar. (70% chose this)
Click here to add explanation
When operating in coastal waters (sea area A1), a GMDSS-equipped vessel must:
  • Maintain a continuous DSC watch on 8514.5 kHz. (0% chose this)
  • Maintain a continuous aural watch on 2182.0 kHz. (4% chose this)
  • Maintain a continuous DSC watch on VHF channel 16. (23% chose this)
  • Maintain a continuous DSC watch on VHF channel 70. (73% chose this)
Click here to add explanation
DSC transmissions are encoded:
  • Using J3E mode for proper follow-on communications. (19% chose this)
  • Using F1B mode to ensure proper reception. (15% chose this)
  • Using a ten-bit error detecting code. (58% chose this)
  • Using J2B mode for correct transmission. (8% chose this)
Click here to add explanation
Which of the following would be a valid SELCAL for use in ARQ communications?
  • 1106 (50% chose this)
  • 212420 WHAQ X. (5% chose this)
  • Four marks (ones) and three spaces (zeroes) forming the binary signal "1001101". (30% chose this)
  • This is established by the communications protocol used with the modem. (15% chose this)
Click here to add explanation
ITU duplex channel 1604 would mean:
  • Ch-16 in the 4 MHz band. (4% chose this)
  • Ch-1604 in the MF band. (12% chose this)
  • Ch-4 in the 16 MHz band. (80% chose this)
  • Ch-4 in the 6 MHz band. (4% chose this)
Click here to add explanation
Which statement concerning Inmarsat-B and Inmarsat-C terminals is correct?
  • Both Inmarsat-B and Inmarsat-C units are capable of fax and voice communications. (7% chose this)
  • Inmarsat-B units are not capable of data communications, but Inmarsat-C units are capable of data communications. (17% chose this)
  • Both Inmarsat-B and Inmarsat-C units can send data as well as send messages to fax machines. (37% chose this)
  • None of these answers is correct. (40% chose this)
Click here to add explanation
At sea, all required equipment (other than Survival Craft Equipment) must be proven operational by:
  • Testing at least every 48 hours. (0% chose this)
  • Weekly testing of all S.C.E. and other compulsory equipment. (11% chose this)
  • Daily testing or daily successful use of the equipment. (81% chose this)
  • Daily testing of the S.C.E. and weekly tests of the other equipment. (7% chose this)
Click here to add explanation
What is the fundamental concept of the GMDSS?
  • GMDSS utilizes automated systems and satellite technology to improve emergency communications for the world's shipping industry. (91% chose this)
  • It is intended to automate and improve existing digital selective calling procedures and techniques. (6% chose this)
  • It is intended to provide more effective but lower cost commercial communications. (3% chose this)
  • It is intended to provide compulsory vessels with a collision avoidance system when they are operating in waters that are also occupied by non-compulsory vessels. (0% chose this)
Click here to add explanation
What statement is correct regarding the maintenance requirements for A3 ships under GMDSS?
  • If the vessel selects at-sea maintenance no additional parts and spares are required. (0% chose this)
  • On-board maintenance provided by a person holding a GMDSS Maintainer's license will fully meet the requirements. (13% chose this)
  • Redundancy of functions of certain equipment and on-board maintenance provided by a person holding a GMDSS Maintainer's license will partially meet this requirement. (77% chose this)
  • Shoreside maintenance and scheduled tests and inspections will not partially meet this requirement. (10% chose this)
Click here to add explanation
What is the responsibility of compulsory GMDSS vessels?
  • Every vessel must be able to perform communications functions essential for its own safety and the safety of other vessels. (100% chose this)
  • Vessels must transmit a DSC distress relay upon receipt of a DSC distress alert. (0% chose this)
  • Only the vessels closest to a Distress incident must render assistance. (0% chose this)
  • Vessels must immediately acknowledge all DSC distress alerts. (0% chose this)
Click here to add explanation
Which of the following are required GMDSS functions?
  • Bridge-to-Bridge communications, reception of weather map facsimile broadcasts, SAR communications. (3% chose this)
  • Reception of weather map facsimile broadcasts, receiving company email, On-scene communications. (0% chose this)
  • Reception of VHF weather channels, On-scene communications, general communications. (10% chose this)
  • Bridge-to-Bridge communications, general communications, SAR communications. (87% chose this)
Click here to add explanation
If operating within Ocean Area A1, and outside of NAVTEX coverage, a GMDSS-equipped vessel must carry:
  • Equipment capable of reception of Maritime Safety Information by the Inmarsat enhanced group call system, or HF SITOR (NBDP). (63% chose this)
  • A GPS receiver. (3% chose this)
  • Equipment capable of maintaining a continuous DSC watch on 2187.5 kHz. (27% chose this)
  • An Inmarsat-B terminal. (7% chose this)
Click here to add explanation
Which of these can be used to receive MSI?
  • SART (4% chose this)
  • EPIRB (4% chose this)
  • Inmarsat-B (15% chose this)
  • NAVTEX (77% chose this)
Click here to add explanation
Vessels operating in which sea area(s) are required to carry either Inmarsat or HF equipment or a combination thereof under GMDSS?
  • All sea areas (16% chose this)
  • A4 (3% chose this)
  • A3 (81% chose this)
  • A1 (0% chose this)
Click here to add explanation
Which GMDSS communication functions must all compulsory vessels be capable of performing to meet International Maritime Organization requirements?
  • Distress alerting and receipt of Maritime Safety Information via Inmarsat for all vessels intending to operate in Sea Area A4. (3% chose this)
  • Distress alerting and receipt of MSI in Sea Areas A1, A2, A3, and A4 regardless of the vessel's intended area of operation. (10% chose this)
  • Distress alerting, general communications and receipt of Maritime Safety Information in the vessel's intended area of operation. (86% chose this)
  • General communications via Inmarsat and receipt of Maritime Safety Information via Enhanced Group Calling in Sea Area A4. (0% chose this)
Click here to add explanation
What is the basic concept of GMDSS?
  • Shoreside authorities will rely on reports from nearby vessels to become aware of Distress alerts. (0% chose this)
  • Shoreside authorities and vessels can assist in a coordinated SAR operation only after the correct chain of DSC relays takes place. (0% chose this)
  • SAR authorities ashore can be alerted to a Distress situation & shipping in the vicinity can be requested to participate in SAR operations. (100% chose this)
  • SAR authorities ashore wait to have EPIRB Distress alerts confirmed by satellite follow-on communications. (0% chose this)
Click here to add explanation
What is defined as the area within the radiotelephone coverage area of at least one VHF coast station in which continuous DSC alerting is available as defined by the IMO regulation for GMDSS?
  • Ocean Area Regions AOR-E, AOR-W, POR or IOR (3% chose this)
  • Sea Area A2 (6% chose this)
  • Sea Area A1 (88% chose this)
  • Coastal and Inland Waters (3% chose this)
Click here to add explanation
A ship operating in sea area A-1 must have the following provisions for maintenance:
  • Shore maintenance. (0% chose this)
  • Duplication of equipment. (0% chose this)
  • At Sea Maintenance. (0% chose this)
  • Any one of these is sufficient. (100% chose this)
Click here to add explanation
What system provides accurate vessel position information to the GMDSS equipment?
  • COSPAS-SARSAT (13% chose this)
  • EPIRB (0% chose this)
  • GPS (88% chose this)
  • Inmarsat-B (0% chose this)
Click here to add explanation
What statement is true regarding the additional equipment carriage requirement imposed for the survival craft of vessels over 500 gross tons?
  • Additional carriage of two radio equipped lifeboats aft. (3% chose this)
  • A second radar transponder is required. (80% chose this)
  • Four additional portable VHF radios are required. (10% chose this)
  • The ability to communicate in all modes with any shore station. (7% chose this)
Click here to add explanation
What sea area is defined as being within range of a shore-based MF station that provides for continuous DSC alerting?
  • Coastal waters (0% chose this)
  • Sea area A3 (4% chose this)
  • Sea area A1 (38% chose this)
  • Sea area A2 (58% chose this)
Click here to add explanation
What equipment is programmed to initiate transmission of Distress alerts and calls to individual stations?
  • NAVTEX (0% chose this)
  • GPS (3% chose this)
  • DSC Controller (94% chose this)
  • DSC Scanning Watch Receiver (3% chose this)
Click here to add explanation
What equipment can be used to receive Maritime Safety Information?
  • NAVTEX, EGC receiver or HF SITOR (NBDP). (53% chose this)
  • EGC receiver, Inmarsat B or F77 terminal. (3% chose this)
  • HF SITOR (NBDP), Inmarsat B or NAVTEX. (0% chose this)
  • All of these answers are correct. (43% chose this)
Click here to add explanation
GMDSS is required for which of the following?
  • All vessels capable of international voyages. (8% chose this)
  • SOLAS Convention ships of 300 gross tonnage or more. (76% chose this)
  • Vessels operating outside of the range of VHF coast radio stations. (12% chose this)
  • Coastal vessels of less than 300 gross tons. (4% chose this)
Click here to add explanation
Which of the following regions lie outside Sea Areas A1, A2, and A3?
  • Sea Areas only apply to Inmarsat footprint areas. (0% chose this)
  • Sea Area A3-I Inmarsat coverage and Sea Area A3-S HF SITOR (NBDP) coverage. (0% chose this)
  • Sea Area A4 (93% chose this)
  • There are no additional Sea Areas. (7% chose this)
Click here to add explanation
What equipment is used in or near the survival craft?
  • NAVTEX (0% chose this)
  • EPIRB (97% chose this)
  • Fathometer (0% chose this)
  • COSPAS-SARSAT (3% chose this)
Click here to add explanation
GMDSS-equipped ships will be required to perform which of the following communications functions?
  • Distress alerting, MSI, SAR and on-scene communications & receipt of satellite alerts from other vessels. (12% chose this)
  • SAR and on-scene communications, Bridge-to-Bridge and general radio communications, MSI and relay of satellite alerts from other vessels. (8% chose this)
  • Bridge-to-Bridge and general radio communications, RDF of EPIRB homing signals, Distress alerting and MSI. (4% chose this)
  • Transmit distress alerts, SAR and on-scene communications, MSI, Bridge-to-Bridge and general radio communications. (77% chose this)
Click here to add explanation
What equipment utilizes satellite communications?
  • Inmarsat-C (89% chose this)
  • VHF-MF-HF (0% chose this)
  • NAVTEX (7% chose this)
  • SART (4% chose this)
Click here to add explanation
Which of the following are required GMDSS functions for vessels?
  • Transmit and receive locating signals, general communications and SAR communications. (43% chose this)
  • Transmit and receive general communications, transmit Distress Alerts by at least one means, MSI. (18% chose this)
  • Transmit and receive locating signals, send MSI to other ships via EGC, Bridge-to-Bridge communications. (4% chose this)
  • Transmit and receive SAR communications, transmit Distress Alerts by at least one means, Bridge-to-Bridge communications. (36% chose this)
Click here to add explanation
Within a single sea area, what is the primary reason GMDSS imposes carriage requirements for different radio subsystems?
  • Redundancy in duplicating all operational functions in the event of a system failure. (22% chose this)
  • Different subsystems are required to meet the specific equipment carriage requirements of national authorities. (15% chose this)
  • GMDSS vessels must be equipped to communicate in all modes with coast radio stations. (11% chose this)
  • The combined capabilities of redundant subsystems mitigate the risk of a single point of failure. (52% chose this)
Click here to add explanation
GMDSS is primarily a system based on:
  • Ship-to-ship Distress communications using MF or HF radiotelephony. (0% chose this)
  • VHF digital selective calling from ship to shore. (0% chose this)
  • Distress, Urgency and Safety communications carried out by the use of narrow-band direct printing telegraphy. (7% chose this)
  • The linking of search and rescue authorities ashore with shipping in the immediate vicinity of a ship in Distress or in need of assistance. (93% chose this)
Click here to add explanation
The primary purpose of the GMDSS is:
  • Allow more effective control of SAR situations by vessels. (0% chose this)
  • Automate and improve emergency communications for the world's shipping industry. (97% chose this)
  • Provide additional shipboard systems for more effective company communications. (3% chose this)
  • Effective and inexpensive communications. (0% chose this)
Click here to add explanation
Which of the following is a GMDSS requirement for all vessels over 300 gross tons operating within range of a MF-DSC equipped shore station?
  • Ship's Master or radio officer must be on watch at all times. (14% chose this)
  • Only one of the three maintenance options is required. (54% chose this)
  • MF communications must be handled by the holder of a General Radiotelephone Operator's License. (29% chose this)
  • Only FCC required spare parts and a maintenance kit for repairs are required. (4% chose this)
Click here to add explanation
Which GMDSS system utilizes terrestrial radio techniques?
  • F-77 (0% chose this)
  • Inmarsat-C (0% chose this)
  • GPS (8% chose this)
  • VHF-MF-HF-DSC (92% chose this)
Click here to add explanation
If a vessel is engaged in local trade and at no point in its voyage travels outside the range of a VHF shore station with continuous DSC alerting then the vessel is operating in what area?
  • Sea area A1 (90% chose this)
  • Coastal and international zones (0% chose this)
  • Inland and coastal waters (7% chose this)
  • Sea areas A1 and A2 (3% chose this)
Click here to add explanation
SITOR (NBDP) equipment is a partial or alternate carriage requirement under GMDSS for vessels operating in which sea area(s)?
  • A1 (0% chose this)
  • A3 and A4 (79% chose this)
  • A1 and A2 (7% chose this)
  • A1, A2, A3 and A4 (14% chose this)
Click here to add explanation
What is defined as an area, excluding sea areas A1 and A2, within the coverage of an Inmarsat geostationary satellite in which continuous alerting is available?
  • Ocean Area Regions AOR-E, AOR-W, POR or IOR (15% chose this)
  • Sea Area A3 (70% chose this)
  • Sea Area A4 (7% chose this)
  • Coastal and Inland Waters (7% chose this)
Click here to add explanation
Which of the following statements concerning GMDSS maintenance requirements is true?
  • The options are duplication of equipment, at-sea maintenance, and shore-based maintenance. (66% chose this)
  • Compulsory vessels between 300-500 gross tons are required only to provide one maintenance option, while compulsory vessels larger than 500 gross tons and all passenger vessels are required to provide any two of the three maintenance options. (21% chose this)
  • The "at-sea" maintenance may be waived if the compulsory vessel carries at least three licensed GMDSS Radio Operators. (3% chose this)
  • Compulsory vessels operating in Sea Area A4 are required to carry at least one licensed GMDSS Radio Maintainer. (10% chose this)
Click here to add explanation
A vertical (whip) antenna has a radiation pattern best described by?
  • A figure eight (0% chose this)
  • A circle (88% chose this)
  • A cardioid (8% chose this)
  • An ellipse (4% chose this)
Click here to add explanation
What is the frequency range for Very High Frequency?
  • 30-300 MHz (57% chose this)
  • 3-30 MHz (21% chose this)
  • 300-3,000 kHz (18% chose this)
  • 10-30 MHz (4% chose this)
Click here to add explanation
How many SITOR (NBDP) signals can occupy the space of one voice signal?
  • 10 (10% chose this)
  • 6 (55% chose this)
  • 4 (3% chose this)
  • 2 (31% chose this)
Click here to add explanation
Which of the following statements describes the carrier?
  • The carrier consists of at least 3 separate but closely spaced frequencies. (4% chose this)
  • The carrier is used to modulate the information signal. (12% chose this)
  • There are always sidebands on either side of the carrier. (4% chose this)
  • The carrier is a Radio Frequency (RF) signal that is modulated to carry intelligence. (81% chose this)
Click here to add explanation
How many sidebands are present in the J3E mode?
  • Two sidebands and a carrier. (24% chose this)
  • One upper sideband. (55% chose this)
  • One lower sideband. (6% chose this)
  • Two carriers and one sideband. (15% chose this)
Click here to add explanation
What is the most common type of antenna for GMDSS MF-HF?
  • Vertically polarized whip antenna (91% chose this)
  • Horizontally polarized long wire antenna. (0% chose this)
  • Horizontally polarized vertical whip antenna. (9% chose this)
  • Satellite radome with vertical polarization. (0% chose this)
Click here to add explanation
What is the channel spacing for MF-HF voice frequencies?
  • 500 Hz (13% chose this)
  • 2.8 kHz (10% chose this)
  • 3.0 kHz (70% chose this)
  • 3.5 kHz (7% chose this)
Click here to add explanation
You look up a frequency table and all the listings end in either .0 or .5 kHz. What kind of emission is used with these frequencies?
  • F1B/J2B SITOR (NBDP) (63% chose this)
  • J3E SSB Voice (13% chose this)
  • F3E FM Voice (25% chose this)
  • G3E FM Voice (0% chose this)
Click here to add explanation
Which emission mode occupies the most bandwidth?
  • J2B (4% chose this)
  • F3E (71% chose this)
  • J3E (21% chose this)
  • F1B (4% chose this)
Click here to add explanation
What is the frequency range for High Frequency?
  • 300-3,000 kHz (14% chose this)
  • 30-300 MHz (24% chose this)
  • 10-30 MHz (7% chose this)
  • 3-30 MHz (55% chose this)
Click here to add explanation
Which of the following systems is least susceptible to atmospheric disturbances?
  • Inmarsat (100% chose this)
  • NAVTEX (0% chose this)
  • MF SITOR (NBDP) (0% chose this)
  • HF SITOR (NBDP) (0% chose this)
Click here to add explanation
What is the emission designation for VHF-FM?
  • F3C (6% chose this)
  • F3E (68% chose this)
  • J2B (13% chose this)
  • H3E (13% chose this)
Click here to add explanation
What advantage does a vertical whip have over a long wire?
  • It radiates equally well in all directions. (100% chose this)
  • It radiates directionally for better propagation. (0% chose this)
  • It radiates a strong signal vertically. (0% chose this)
  • It radiates more signal fore and aft. (0% chose this)
Click here to add explanation
Which statement best describes amplitude modulation?
  • The character data from the terminal is changed to audio tones. (0% chose this)
  • The frequency is varied in synchronization with the modulating signal. (14% chose this)
  • The amplitudes in the sideband(s) changes but the radio carrier frequency remains constant. (64% chose this)
  • The amplitude of the carrier is changed but there is still only a single frequency being transmitted. (21% chose this)
Click here to add explanation
Which of the following statements is true?
  • An RF carrier is always required to carry the information. (11% chose this)
  • There is only a single tone used in J2B mode. (0% chose this)
  • There are a carrier and two sidebands in H3E mode. (11% chose this)
  • There are two tones used in J2B mode. (79% chose this)
Click here to add explanation
What is the frequency range for Ultra High Frequency?
  • 3-30 MHz (14% chose this)
  • 300-3,000 MHz (69% chose this)
  • 30-300 MHz (10% chose this)
  • 10-30 MHz (7% chose this)
Click here to add explanation
On what frequencies would the J3E emission be used for GMDSS Distress communications?
  • 2182.0 kHz, 16420.0 kHz or 8291.0 kHz. (52% chose this)
  • 2182.0, 2187.5 KHz or 8414.5 kHz. (31% chose this)
  • 8414.5 KHz, 8291.0 kHz or 8376.5 kHz. (10% chose this)
  • 4125.0 kHz, 16420.0 kHz or 4177.5 kHz. (7% chose this)
Click here to add explanation
What is the frequency range for Super High Frequency?
  • 30-300 GHz (20% chose this)
  • 3-30 GHz (60% chose this)
  • 300-3,000 MHz (13% chose this)
  • 30-300 MHz (7% chose this)
Click here to add explanation
Which statement best describes frequency modulation?
  • The information signal changes the radio carrier frequency but the amplitude remains constant. (90% chose this)
  • Both the amplitude and frequency are changed by the modulating signal. (7% chose this)
  • Frequency modulation is subject to interference by atmospheric noise. (3% chose this)
  • High level mixing of the final amplifier signal and the information signal. (0% chose this)
Click here to add explanation
Which of the following systems is most susceptible to fading or static interference?
  • Inmarsat (3% chose this)
  • HF SITOR (NBDP) (71% chose this)
  • DSC on channel 70 (3% chose this)
  • VHF ARQ (23% chose this)
Click here to add explanation
What is the emission designation for MF-HF voice signals?
  • F1B (0% chose this)
  • J2B (6% chose this)
  • F3E (21% chose this)
  • J3E (73% chose this)
Click here to add explanation
Which mode occupies the least bandwidth?
  • H3E (3% chose this)
  • A3E (14% chose this)
  • J2B (72% chose this)
  • F3E (10% chose this)
Click here to add explanation
A vertical quarter wave antenna with a good ground connection will:
  • Radiate directionally due to being grounded. (4% chose this)
  • Not function due to being grounded. (4% chose this)
  • Only be used in Satellite communications. (0% chose this)
  • Radiate omni-directionally. (92% chose this)
Click here to add explanation
What is the purpose or function of the antenna coupler?
  • Electrically matching the antenna system to the transmit frequency. (17% chose this)
  • Changing the overall wavelength of the antenna system (in addition to the fixed length whip.) (0% chose this)
  • Enabling maximum transmitted signal on the band chosen by the operator. (3% chose this)
  • All of these answers are functions of the antenna coupler. (80% chose this)
Click here to add explanation
Which of the following frequency bands would most likely provide reliable communications between two stations that are 100 miles (160 km) apart?
  • The Low Frequency (LF) band. (0% chose this)
  • The High Frequency (HF) band. (7% chose this)
  • The Very High Frequency (VHF) band. (7% chose this)
  • The Medium Frequency (MF) band. (87% chose this)
Click here to add explanation
What statement best describes modulation?
  • Imposing intelligence onto a radio carrier signal. (90% chose this)
  • Changing mark-space to 1 and 0. (0% chose this)
  • Adjusting the frequency to the optimum band for long distance communications. (7% chose this)
  • Converting the carrier from a low frequency to a higher frequency. (3% chose this)
Click here to add explanation
Which system has the least effective radius of operation?
  • VHF DSC (83% chose this)
  • HF SITOR (NBDP) (14% chose this)
  • MF SITOR (NBDP) (3% chose this)
  • NAVTEX (0% chose this)
Click here to add explanation
Why is an antenna tuner required for MF-HF transmissions?
  • The antenna tuner calculates the proper spectrum band for the operator to use. (16% chose this)
  • To ensure transmissions are restricted to legal marine frequencies. (0% chose this)
  • The length of the physically-fixed antenna must be electrically matched to the intended frequency of operation. (81% chose this)
  • The antenna tuner indicates whether the ionosphere is ready to reflect a transmission properly. (3% chose this)
Click here to add explanation
What is the frequency range for Medium Frequency?
  • 10-30 MHz (15% chose this)
  • 1,000-10,000 kHz (4% chose this)
  • 300-3,000 kHz (56% chose this)
  • 30-300 kHz (26% chose this)
Click here to add explanation
What is the primary frequency range for terrestrial communications using skywave propagation?
  • 300-3,000 kHz (13% chose this)
  • 30-300 MHz (28% chose this)
  • 3-30 MHz (56% chose this)
  • 10-30 MHz (3% chose this)
Click here to add explanation
Which of the following statements meets requirements for 47 CFR 80 Subpart-W?
  • GMDSS Radio Logs may not be retained aboard compulsory vessels in an electronic file (e.g., word processing) format. (4% chose this)
  • GMDSS Radio Logs must contain entries of all Distress and Urgency communications affecting your own ship. (80% chose this)
  • GMDSS Radio Logs must be retained aboard compulsory vessels for a period of at least 90 days in their original form. (4% chose this)
  • Entries in the GMDSS Radio Log are only required for communications within the vessel's intended Sea Area of operation. (12% chose this)
Click here to add explanation
During an annual GMDSS station inspection:
  • All required documents and publications might have to be produced and GMDSS operators may be required to demonstrate equipment competencies. (62% chose this)
  • Licensed GMDSS operators may not be required to demonstrate equipment competencies but all required equipment must be fully operational. (14% chose this)
  • All required equipment must be fully operational and any required publications that are not current must be on order. (17% chose this)
  • GMDSS operators may be required to demonstrate equipment competencies and any of required equipment that is not fully operational can be repaired at the next port of call as long as there is functional duplication. (7% chose this)
Click here to add explanation
What periodic inspection is required in order to remain in compliance with the regulations regarding GMDSS ship radio station inspections?
  • U.S. Coast Guard annual inspection. (0% chose this)
  • An inspection at least once every 12 months by the FCC or a holder of a GMDSS Maintainers license. (90% chose this)
  • FCC inspection every five years. (10% chose this)
  • Periodic inspections not required if on board maintainers perform routine preventive maintenance. (0% chose this)
Click here to add explanation
Which statement is false regarding the radio operator requirements for a GMDSS-equipped ship station?
  • Maintaining a record of all incidents connected with the radio-communications service that appear to be of importance to Safety of life at sea is not required. (70% chose this)
  • One of the qualified GMDSS radio operators must be designated to have primary responsibility for radio-communications during Distress incidents. (17% chose this)
  • A qualified GMDSS radio operator, and a qualified backup, must be designated to perform Distress, Urgency and Safety communications. (3% chose this)
  • While at sea, all adjustments or radio installations, servicing or maintenance of such installations that may affect the proper operation of the GMDSS station must be performed by, or under the supervision of, a qualified GMDSS radio maintainer. (10% chose this)
Click here to add explanation
A vessel certified for service in Sea Area A3 is required to maintain a watch on:
  • VHF Channel 70, MF Frequency 2182.0 kHz, HF on 8414.5 kHz and one other HF DSC frequency. (19% chose this)
  • MF Frequency 2187.5 kHz, HF on 8414.5 kHz and one other HF DSC frequency, HF on 4125.0 kHz. (15% chose this)
  • VHF Channel 70, MF Frequency 2187.5 kHz, HF on 8414.5 kHz and one other HF DSC frequency. (30% chose this)
  • VHF Channel 16, VHF Channel 70, MF Frequency 2187.5 kHz, HF on 8414.5 MHz and HF 4177.5 MHz. (37% chose this)
Click here to add explanation
Where should the GMDSS radio log be kept on board ship?
  • Captain's office (0% chose this)
  • Sea cabin (0% chose this)
  • Anywhere on board the vessel. (0% chose this)
  • At the GMDSS operating position. (100% chose this)
Click here to add explanation
Under GMDSS, a compulsory VHF-DSC radiotelephone installation must be tested at what minimum intervals at sea?
  • Annually, by a representative of the FCC. (4% chose this)
  • At the annual SOLAS inspection. (0% chose this)
  • Monthly (0% chose this)
  • Daily (96% chose this)
Click here to add explanation
When may a compulsory vessel not be allowed to leave port?
  • When the vessel is in an over-carriage condition. (0% chose this)
  • When the vessel has arranged for both duplication of equipment and shore-based maintenance. (3% chose this)
  • When the vessel is carrying only two licensed GMDSS Radio Operators and is capable of performing all required functions. (3% chose this)
  • When the vessel has replaced a required piece of GMDSS-related equipment but its performance has not been verified or logged. (93% chose this)
Click here to add explanation
What characteristics describe the GMDSS Reserve Source of Energy (RSE)?
  • Supplies independent HF and MF installations at the same time. (3% chose this)
  • Cannot be independent of the propelling power of the ship. (0% chose this)
  • Must be incorporated into the ship's electrical system. (0% chose this)
  • Must be independent of the ship's electrical system when the RSE is needed to supply power to the GMDSS equipment. (97% chose this)
Click here to add explanation
Which of the following maintenance functions is not the responsibility of the GMDSS Radio Operator?
  • Visual inspection of equipment, including the antenna and associated components. (4% chose this)
  • Perform on-the-air verification checks. (0% chose this)
  • Aligning the power output stage for maximum power. (86% chose this)
  • Perform scheduled testing of the battery's charged condition. (11% chose this)
Click here to add explanation
Where can GMDSS regulations pertaining specifically to U.S.-flag vessels be found?
  • These are located in 47 CFR Part 80. (92% chose this)
  • These are located in CCIR #476. (0% chose this)
  • These are located in FCC Part 83. (4% chose this)
  • These are published only by the U.S. Coast Guard. (4% chose this)
Click here to add explanation
Which of the following references should be consulted to identify the name of a vessel based on its Maritime Mobile Service Identity?
  • ITU list of Coast Stations. (12% chose this)
  • ITU List of Radio-determination and Ship Stations. (8% chose this)
  • ITU Master Plan of Shore-Based Facilities. (0% chose this)
  • ITU List of Ship Stations and Maritime Mobile Service Identity Assignments. (80% chose this)
Click here to add explanation
What are the mandatory DSC watchkeeping bands/channels?
  • 8 MHz HF DSC, 1 other HF DSC, 2 MHz MF DSC and VHF Ch-70. (48% chose this)
  • 2 MHz MF DSC, 8 MHz DSC, VHF Ch-16 and 1 other HF DSC. (8% chose this)
  • VHF Ch-70, 2 MHz MF DSC, 6 MHz DSC and 1 other HF DSC. (16% chose this)
  • VHF Ch-70, 2 MHZ MF DSC, 4 MHZ DSC and 8 MHz DSC. (28% chose this)
Click here to add explanation
Which statement is false regarding the maintenance of GMDSS equipment at sea?
  • The GMDSS maintainer may not be the person designated to have primary responsibility for radio-communications during Distress incidents even if licensed as an operator. (76% chose this)
  • Ships must carry at least one person who qualifies as a GMDSS maintainer for the maintenance and repair of equipment if the at-sea maintenance option is selected. (3% chose this)
  • All at-sea maintenance and repairs must be performed by, or under the supervision of a person holding a GMDSS Maintainer license. (10% chose this)
  • The GMDSS maintainer may be the person responsible for ensuring that the watches are properly maintained and that the proper guard channels and the vessel's position are entered into the DSC equipment. (10% chose this)
Click here to add explanation
While underway, how frequently is the DSC controller required to be tested?
  • Once a week (3% chose this)
  • Once a day (86% chose this)
  • Twice a week (0% chose this)
  • Once a month (10% chose this)
Click here to add explanation
What publications should the GMDSS Radio Operator consult to review the proper procedures to be followed in Distress situations under GMDSS?
  • The manufacturer's technical manuals. (4% chose this)
  • 47 CFR Part 80 Subpart W. (74% chose this)
  • The manufacturer's operator manuals. (15% chose this)
  • 47 CFR Part 90 Subpart V. (7% chose this)
Click here to add explanation
Which situation is least likely to result in an inspection of the radio installation by foreign governments or administrations?
  • When the ship's station license cannot be produced without delay. (14% chose this)
  • When a ship visits a port for the first time. (79% chose this)
  • When operational irregularities are observed. (4% chose this)
  • When compulsory equipment is found to be inoperative. (4% chose this)
Click here to add explanation
What are the conditions, under GMDSS, whereby a ship is NOT allowed to depart from any port?
  • The vessel is carrying more than the required number of qualified GMDSS radio operators. (0% chose this)
  • The vessel is not capable of performing all required Distress and Safety functions. (100% chose this)
  • The vessel has a temporary waiver of its radio license and Safety Certificate. (0% chose this)
  • The vessel is not carrying a GMDSS radio maintainer, but has provided for shoreside maintenance plus duplication of equipment if required. (0% chose this)
Click here to add explanation
Which of the following are personnel, functional, or equipment FCC requirements of the GMDSS?
  • One FCC licensed GMDSS radio operator in sea areas A1 & A2, two FCC licensed GMDSS radio operators in sea areas A3 & A4 and equipment carriage based on intended sea area of operations. (17% chose this)
  • Distress alerting and response, two USCG STCW GMDSS watchstanders, equipment carriage based on intended sea area of operations. (4% chose this)
  • Equipment carriage reduced for sea areas A3 & A4, Distress alerting and response and two FCC licensed GMDSS radio operators. (0% chose this)
  • Equipment carriage based on intended sea area of operations, distress alerting and response and two FCC licensed GMDSS radio operators. (79% chose this)
Click here to add explanation
Which FCC license meets the requirement to serve as a GMDSS operator?
  • General Radiotelephone Operator's License. (0% chose this)
  • GMDSS Radio Operator's License. (92% chose this)
  • Marine Radio Operator's Permit. (4% chose this)
  • GMDSS Radio Maintainer's License. (4% chose this)
Click here to add explanation
How often must a compulsory vessel's GMDSS radio station be inspected?
  • Annually, by the FCC or designated authority. (79% chose this)
  • Annually, by the U.S. Coast Guard. (8% chose this)
  • Annually, by the FCC, and every six months if the vessel sails outside of Sea Areas A1 and A2. (4% chose this)
  • The FCC's annual inspection may be waived if and only if monthly inspections are performed by the vessel's on-board GMDSS Radio Maintainer. (8% chose this)
Click here to add explanation
Which statement concerning the testing of a compulsory radiotelephone station is false?
  • Calling the USCG on VHF CH-16 or 2182.0 kHz is the most effective method. (76% chose this)
  • Tests may be accomplished by using the equipment for normal business. (4% chose this)
  • A daily test is necessary unless the equipment was used for routine traffic. (4% chose this)
  • The test may not interfere with communications in progress and must wait or be suspended if a request to do so is made. (16% chose this)
Click here to add explanation
Which of the following documents or publications are required by the FCC for GMDSS vessels on international voyages (other than the Great Lakes)?
  • IMO master plan of shore-based facilities (or substitute), station logs, appropriate operator licenses, Inmarsat handbook for GMDSS. (4% chose this)
  • NGA Pub. 117 (or substitute), station logs, appropriate operator licenses, IAMSAR manual volume III. (25% chose this)
  • Part 80 FCC rules, station logs, station licenses, ITU publications, ITU manual for Maritime Mobile stations. (61% chose this)
  • Part 80 FCC rules, station logs, station licenses, ITU publications, IMO manual for Maritime Mobile stations. (11% chose this)
Click here to add explanation
Which of the following statements is false?
  • Key letters or abbreviations may be used in GMDSS Radio Logbooks if their meaning is explained. (0% chose this)
  • Urgency communications may need to be entered in the GMDSS radio log. (4% chose this)
  • Distress communications heard do not require entries if the vessel did not participate in SAR activity. (82% chose this)
  • Log entries of VHF Safety broadcasts are not required. (14% chose this)
Click here to add explanation
Which statement concerning radio log archival by the station licensee is false?
  • Retain for two years if there are no Distress entries. (20% chose this)
  • Logs related to an investigation may not be destroyed without specific authorization. (0% chose this)
  • Retain for three years if there are Distress entries. (4% chose this)
  • Retain for one year unless there are Distress or Urgency entries. (76% chose this)
Click here to add explanation
What is the meaning of "Reserve Source of Energy"?
  • High caloric value items for lifeboat, per SOLAS regulations. (0% chose this)
  • Power to operate the radio installation and conduct Distress and Safety communications in the event of failure of the ship's main and emergency sources of electrical power. (100% chose this)
  • Diesel fuel stored for the purpose of operating the powered survival craft for a period equal to or exceeding the U.S.C.G. and SOLAS requirements. (0% chose this)
  • The diesel fueled emergency generator that supplies AC to the vessel's Emergency power bus. (0% chose this)
Click here to add explanation
How long must the radio log be retained on board before sending it to the shoreside licensee?
  • At least 30 days after the last entry. (58% chose this)
  • At least one year after the last entry. (15% chose this)
  • At least two years after the last entry. (15% chose this)
  • At least 90 days after the last entry. (12% chose this)
Click here to add explanation
A vessel certified for service in Sea Area A-2 is required to maintain watch on:
  • 2174.5 kHz (0% chose this)
  • 2182.0 kHz (36% chose this)
  • 2738.0 kHz (0% chose this)
  • 2187.5 kHz (64% chose this)
Click here to add explanation
Which FCC license meets the requirements to perform or supervise the performance of at-sea adjustments, servicing, or maintenance which may affect the proper operation of the GMDSS station?
  • General Radiotelephone Operator's License with Shipboard RADAR endorsement. (0% chose this)
  • Marine Radio Operator's Permit or GMDSS Maintainer's license. (0% chose this)
  • GMDSS Radio Operator's license or Marine Radio Operator's Permit. (7% chose this)
  • GMDSS Operator's/Maintainer's license or GMDSS Maintainer's license. (93% chose this)
Click here to add explanation
Which term describes the source of energy required to supply the GMDSS console with power if the ship's source of main or emergency energy fails?
  • Emergency power (0% chose this)
  • Ship's emergency diesel generator (0% chose this)
  • Reserve Source of Energy (100% chose this)
  • Ship's standby generator (0% chose this)
Click here to add explanation
Which of the following service or maintenance functions may NOT be performed by the holder of a GMDSS Radio Operator License?
  • Reset tripped circuit breakers or replace defective fuses. (0% chose this)
  • Any adjustments or maintenance that may affect the proper operation of the station. (97% chose this)
  • Routine battery maintenance if used as part of the GMDSS station. (3% chose this)
  • Replacement of consumable items such as paper, ribbons, etc. (0% chose this)
Click here to add explanation
Which statement is false regarding a GMDSS equipped ship?
  • Ships must have the required equipment inspected at least once every 12 months. (7% chose this)
  • The regulations apply to all passenger ships regardless of size and cargo ships of 300 gross tons and upwards. (11% chose this)
  • Ships must carry at least two persons holding a GMDSS Radio Operator's license for Distress and Safety radio-communications purposes. (7% chose this)
  • A conditional or partial exemption may not be granted, in exceptional circumstances, for a single voyage outside the sea area for which the ship is equipped. (75% chose this)
Click here to add explanation
Which of the following statements concerning GMDSS Radio Operator requirements is false?
  • Each compulsory vessel must carry at least two licensed GMDSS Radio Operators at all times while at sea. (0% chose this)
  • Each compulsory vessel must carry at least two licensed GMDSS Radio Operators at all times while at sea and may elect to carry a GMDSS Radio Maintainer as well. (5% chose this)
  • All communications involving Safety of life at sea must be logged as long as the compulsory vessel was not involved in such communications. (82% chose this)
  • While at sea, adjustments to, and the maintaining of, GMDSS equipment may be performed by the GMDSS Radio Operator as long as the work is supervised by an on-board licensed GMDSS Radio Maintainer. (14% chose this)
Click here to add explanation
Proper watchkeeping includes the following:
  • Understanding normal operational indicators, setting the DSC scanner frequencies to minimize alarms, maintaining a proper log. (7% chose this)
  • Maintaining a proper GMDSS radio station log, understanding normal operational indicators, responding to and comprehending alarms. (86% chose this)
  • Responding to and comprehending alarms, logging out of Inmarsat-C terminals while at sea, maintaining a proper GMDSS radio station log. (7% chose this)
  • Maintaining a proper GMDSS radio station log, setting the DSC scanner frequencies to minimize alarms, logging out of Inmarsat-C terminals while at sea. (0% chose this)
Click here to add explanation
Which of the following logkeeping statements is false?
  • Entries of all company communications using GMDSS satellite equipment are required. (75% chose this)
  • Entries relating to pre-voyage, pre-departure and daily tests are required. (13% chose this)
  • A summary of all Distress communications heard and Urgency communications affecting the station's own ship. Also, all Safety communications (other than VHF) affecting the station's own ship must be logged. (13% chose this)
  • Entries related to failures of compulsory equipment are required. (0% chose this)
Click here to add explanation
Which would indicate a malfunction in a 2182 kHz radiotelephone system?
  • No discernable traffic has been heard on the 2182 kHz during the radiotelephone silent periods. (5% chose this)
  • Dramatic increase in noise level observed during night and early morning hours. (0% chose this)
  • Failure to contact another station 60 miles distant during daytime operation. (76% chose this)
  • The visual indication of power to the antenna fluctuates while testing the radiotelephone alarm signal generator into an artificial antenna. (19% chose this)
Click here to add explanation
The Distress Alarm sounds and the screen readout no longer contains the particulars of the Distress:
  • The particulars are rarely routed to the printer so it is of no use to examine the printer. (0% chose this)
  • Examine the Transmitted Data Directory or the printer to recover the information. (27% chose this)
  • Call the Distress vessel on the DSC frequency and request a retransmission. (3% chose this)
  • Examine the Received Data Directory or the printer to recover the information. (70% chose this)
Click here to add explanation
What is the correct procedure for calling a coast radio station using HF radiotelephone?
  • On a properly selected ITU channel, give the name of the coast radio station being called three times, and the words "this is" followed by the name of the ship initiating the call three times, and ending with "over". (32% chose this)
  • Contact the nearest U.S.C.G. station to add the desired ship's call sign to the station's traffic list. (0% chose this)
  • Request the VTS operator place the call on channel 22A. (5% chose this)
  • On a correct ITU channel, give the call sign of the coast radio station three times using phonetics, the words "this is", followed by the ship's call sign three times using phonetics and ending with "over". (64% chose this)
Click here to add explanation
When placing a SSB MF/HF call to a Coast Station, you should always:
  • Make sure the frequency is not occupied. (90% chose this)
  • Choose the closest station to ensure a quick connection. (5% chose this)
  • Tune the transmitter on another frequency. (0% chose this)
  • Wait until the coast station sends his traffic list. (5% chose this)
Click here to add explanation
What statement is true regarding the exchange between two parties engaged in SITOR (NBDP) communications?
  • In ARQ, each character is transmitted twice, with the second displaced in time from the first. (17% chose this)
  • In ARQ, the "sending" station transmits a block of three characters and the "receiving" station responds with a one character Repeat Request. Following this the "transmitting" station will send a new block. (22% chose this)
  • In ARQ, the ISS transmits a block of 3 characters and the IRS checks for parity. If the received block is correct a one-character control signal is sent notifying the ISS to proceed with the next block. If the parity check fails the block must be resent. (61% chose this)
  • Broadcasts of Maritime Safety Information, traffic lists, etc. can be copied by the receiving station in ARQ mode. (0% chose this)
Click here to add explanation
If the vessel is beyond range of NAVTEX broadcasts and the Inmarsat-C system fails, the GMDSS operator must:
  • Select 518 kHz ARQ TELEX on the MF/HF console to receive MSI. (16% chose this)
  • Request repairs of the Sat-C system and wait until within range of NAVTEX. (5% chose this)
  • Select 518 kHz FEC TELEX on the MF/HF console to receive MSI. (37% chose this)
  • Select an HF MSI frequency and FEC TELEX mode to receive MSI. (42% chose this)
Click here to add explanation
At mid-day, what would be the best choice in attempting to communicate with a shore station some 75 miles distant?
  • MF (47% chose this)
  • VHF-FM (26% chose this)
  • 22 MHz band (16% chose this)
  • 16 MHz band (11% chose this)
Click here to add explanation
Which of the following keystrokes or characters is sent as part of ARQ communications to request a direct TELEX call to a shore-based location?
  • DIRTLX023123456+ (64% chose this)
  • MSG+ (12% chose this)
  • GA+? (16% chose this)
  • ENTER (8% chose this)
Click here to add explanation
A Coast Station that is described as ATOR typically provides what type of services?
  • NAVTEX BFEC weather broadcasts. (18% chose this)
  • ARQ SITOR (NBDP) connections to shoreside terminals. (41% chose this)
  • BFEC SITOR (NBDP) connections to shoreside terminals. (18% chose this)
  • SITOR (NBDP) HF weather broadcasts. (23% chose this)
Click here to add explanation
Which of the following defines "ITU Channel 1216"?
  • Ch-12 in the 16 MHz band. (15% chose this)
  • Ch-1216 in the MF band. (5% chose this)
  • Ch-12 in the 16 kHz band. (10% chose this)
  • Ch-16 in the 12 MHz band. (70% chose this)
Click here to add explanation
Which statement regarding channel spacing and bandwidth is true?
  • Both TELEX bandwidth and channel spacing values are less than voice bandwidth and channel spacing values. (60% chose this)
  • Voice bandwidth is greater than TELEX bandwidth and therefore voice channel spacing values are less than TELEX channel spacing values. (16% chose this)
  • TELEX bandwidth is greater than voice bandwidth and therefore TELEX channel spacing values are less than voice channel spacing values. (20% chose this)
  • Both TELEX bandwidth and channel spacing values are greater than voice bandwidth and channel spacing values. (4% chose this)
Click here to add explanation
Communications with an emission of J3E would typically have a channel spacing of:
  • 0.5 kHz (14% chose this)
  • 0.3 kHz (10% chose this)
  • 3.0 kHz (71% chose this)
  • 2.8 kHz (5% chose this)
Click here to add explanation
The proper sequence of emissions corresponding to the sequence AM-Voice DSB, SSB-Voice without carrier, USB-Voice with carrier and FM-Voice, is:
  • A3E, H3E, J3E, F3E. (22% chose this)
  • J3E, H3E, A3E, F3E. (13% chose this)
  • H3E, A3E, J3E, F3E. (9% chose this)
  • A3E, J3E, H3E, F3E. (57% chose this)
Click here to add explanation
What will cause an individual battery cell to reverse polarity.
  • High discharge rates without allowing for a cool down period. (5% chose this)
  • When discharging the battery string if a cell becomes weaker than the remaining cells, the discharge current will effectively charge the weaker cell in reverse polarity. (80% chose this)
  • Insufficient charging which does not bring all of the cells up to full charge. (10% chose this)
  • The charging circuits are connected in the correct polarity but all of the cells are equally charged. (5% chose this)
Click here to add explanation
An ITU simplex channel frequency assignment is defined as:
  • Transmit and receive frequencies must be identical. (77% chose this)
  • Transmit and receive frequencies must be different. (14% chose this)
  • Transmit and receive frequencies may be different, depending on whether communications are ship-shore or ship to ship. (9% chose this)
  • Transmit and receive frequencies are different regardless of emission mode. (0% chose this)
Click here to add explanation
For ARQ communications with a Public Correspondence Coast Station, which sequence of events best describes reaching the point in time where the text of TELEX communications should be sent.
  • Transceiver setup, SELCAL selection, Initiate Call, wait for exchange of answer-backs (WRU-AAB), OPR+, operator entry of the appropriate automatic TELEX code. (11% chose this)
  • Transceiver setup, wait for exchange of answer-backs (WRU-AAB), OPR+, operator entry of the appropriate automatic TELEX code. (11% chose this)
  • Transceiver setup, SELCAL selection, Initiate Call, wait for exchange of answer-backs (WRU-AAB), GA+?, enter DIRTLX xy+, MOM, MSG+? and exchange of terminal answerbacks. (47% chose this)
  • Transceiver setup, wait for exchange of answer-backs (WRU-AAB), GA+? and then send message text. (32% chose this)
Click here to add explanation
Your MF-HF whip antenna breaks off and is carried away in a storm. What would you do to regain operation on MF-HF frequencies?
  • Rig a wire antenna approximately 35-40 ft long per the equipment instruction manual. (85% chose this)
  • Rig a wire antenna 10-15 ft long from the antenna tuner to the highest vertical support. (15% chose this)
  • Rig a horizontal, center-fed dipole antenna 40 ft long. (0% chose this)
  • Rig a long wire antenna at least 200 ft long. (0% chose this)
Click here to add explanation
In ARQ, when the information sending station (ISS) receives a signal that the parity check failed what happens?
  • The next block will be sent. (5% chose this)
  • The data link will break. (10% chose this)
  • The acknowledge light should illuminate. (19% chose this)
  • The last block will be resent. (67% chose this)
Click here to add explanation
At mid-night, what would be the best choice in attempting to communicate, using SITOR (NBDP) with a shore station some 800 miles distant?
  • VHF-FM (0% chose this)
  • Higher UHF bands (10% chose this)
  • Communications are impossible at this distance. (15% chose this)
  • HF bands (75% chose this)
Click here to add explanation
To make a call to another vessel requesting voice communications regarding important company business, the GMDSS operator should:
  • Select Routine priority, enter other vessel's MMSI, specify legal alternate frequency, J2B emission and transmit the properly formatted DSC call. (38% chose this)
  • Select Routine priority, enter own vessel's MMSI, specify legal alternate frequency, J3E emission and transmit the properly formatted DSC call. (29% chose this)
  • None of these answers is correct. (29% chose this)
  • Select Urgency priority, enter other vessel's MMSI, specify legal alternate frequency, F1B emission and transmit the properly formatted DSC call. (5% chose this)
Click here to add explanation
Which of the following statements concerning SITOR (NBDP) communications is true?
  • In ARQ, each character is transmitted twice, about 250 milliseconds apart. (0% chose this)
  • In ARQ, the "information sending station" will transmit a block of three characters that the receiving station will subsequently acknowledge or request be retransmitted. (67% chose this)
  • In ARQ, the "information sending station" transmits a block of three characters twice, about 250 milliseconds apart. (11% chose this)
  • SITOR (NBDP) communications can be used to contact a NAVTEX transmitting station when requesting a repeat transmission of a missed NAVTEX message. (22% chose this)
Click here to add explanation
Which of the following would be a valid automatic TELEX code and number for a request for a real-time TELEX connection to a shore-based TELEX terminal?
  • DIRTLX then waits for MSG+ to dial 023419645+. (6% chose this)
  • DIRTLX23122445+. (17% chose this)
  • DIRTLX followed by GA+? and the TELEX number. (33% chose this)
  • DIRTLX023424998+. (44% chose this)
Click here to add explanation
At mid-day in the summer, what would be the best choice in attempting to communicate, using SITOR (NBDP) with a shore station some 1800 miles distant?
  • VHF-FM (13% chose this)
  • Lower HF bands (19% chose this)
  • Higher HF bands (63% chose this)
  • MF (6% chose this)
Click here to add explanation
What sequence of ARQ codes matches the following: shore station indicates it is awaiting instructions from the vessel, vessel requests a live connection to a land telex number, vessel indicates it is done with the coast station?
  • WRU-AAB, DIRTLX, NNNN (15% chose this)
  • GA+?, DIRTLX, BRK+ (40% chose this)
  • GA+?, DIRTLX, KKKK (40% chose this)
  • WRU-AAB, DIRTLX, ..... (5% chose this)
Click here to add explanation
Which of the following methods will give a GMDSS Radio Operator the best indication of whether ARQ communication can be established with a coast radio station?
  • Referring to propagation charts will tell the Operator when the eruption of communication shattering solar flares will occur. (0% chose this)
  • Selecting a frequency in the MF band averts interference from severe static discharges. (0% chose this)
  • Monitor the coast radio station's "free signals" and call on the frequency on which the loudest and most consistent signals are heard. (100% chose this)
  • Re-position the antenna toward the coast radio station and press the "call request" button. (0% chose this)
Click here to add explanation
An ITU duplex channel frequency is defined as:
  • Transmit and receive frequencies may be identical if communications are ship-shore. (10% chose this)
  • Transmit and receive frequencies must be different. (75% chose this)
  • Transmit and receive frequencies must be identical. (5% chose this)
  • Transmit and receive frequencies may be different if communications are ship-ship. (10% chose this)
Click here to add explanation
Which of the following statements concerning SITOR (NBDP) communications is true?
  • Communication is established on the working channel and answerbacks are exchanged before FEC broadcasts can be received. (13% chose this)
  • All of these answers are true. (57% chose this)
  • Weather broadcasts cannot be made in FEC because sending each character twice would cause the broadcast to be prohibitively long. (0% chose this)
  • Two-way communication with the coast radio station using FEC is not necessary to be able to receive the broadcasts. (30% chose this)
Click here to add explanation
Which of these statements regarding a multi-frequency MF/HF DSC Distress alert is false?
  • Some units transmit on the mandatory MF/HF DSC watch frequencies first, and then on the others. (17% chose this)
  • Some units transmit in ascending order of propagation radius to alert nearby ships or shore stations first. (22% chose this)
  • May be transmitted in any order programmed by the GMDSSS operator. (30% chose this)
  • Multi-frequency alerts work quite differently, depending on the manufacturer and require care and understanding of the feature. (30% chose this)
Click here to add explanation
Which of the following acronyms refers to a communications system that does not use ARQ and/or FEC modes?
  • NAVTEX (18% chose this)
  • SITOR (NBDP) (0% chose this)
  • HF MSI (14% chose this)
  • SART (68% chose this)
Click here to add explanation
What additional equipment provides the maximum availability for receiving SafetyNETTM broadcasts when the associated Inmarsat-C SES is engaged in communications?
  • An integrated EGC receiver with the existing Inmarsat-C equipment. (23% chose this)
  • HF SSB can be used to receive voice MSI broadcasts. (9% chose this)
  • A separate EGC receiver. (59% chose this)
  • Automatic switching between Inmarsat-C and EGC functions. (9% chose this)
Click here to add explanation
Which would be an indication of proper operation of a SSB transmitter rated at 60 watt PEP output?
  • In SITOR (NBDP) communications, the power meter can be seen fluctuating regularly from zero to the 60 watt relative output reading. (38% chose this)
  • In SSB (J3E) voice mode, with the transmitter keyed but without speaking into the microphone, power output is indicated. (25% chose this)
  • In SSB (J3E) mode, speaking into the microphone causes power meter to fluctuate slightly around the 60 watt reading. (29% chose this)
  • A steady indication of transmitted energy on an RF Power meter with no fluctuations when speaking into the microphone. (8% chose this)
Click here to add explanation
Maritime Safety Information is promulgated via satellite through which system?
  • AMVER (0% chose this)
  • NAVTEX (19% chose this)
  • Inmarsat-M SES (7% chose this)
  • SafetyNETTM (74% chose this)
Click here to add explanation
What is the requirement for emergency and reserve power in GMDSS radio installations?
  • Compulsory ships must have emergency and reserve power sources for radio communications. (85% chose this)
  • An emergency power source for radio communications is not required if a vessel has proper reserve power (batteries). (11% chose this)
  • A reserve power source is not required for radio communications. (0% chose this)
  • Only one of the above is required if a vessel is equipped with a second 406 EPIRB as a backup means of sending a Distress alert. (4% chose this)
Click here to add explanation
Which of the following documents or publications are required by Part 80 of the FCC rules for vessels on international voyages (other than the Great Lakes)?
  • Appropriate Safety Convention Certificate, ITU Master Plan of GMDSS Coast stations, and ITU manual for Maritime Mobile stations. (22% chose this)
  • ITU Master Plan of GMDSS Coast stations, ITU manual for Maritime Mobile stations, ITU List IV & List V. (26% chose this)
  • ITU List IV & List V, Appropriate Safety Convention Certificate & ITU manual for Maritime Mobile stations. (48% chose this)
  • ITU List IV & List V, Appropriate Safety Convention Certificate & IMO manual for Maritime Mobile stations. (4% chose this)
Click here to add explanation
Which statement is false regarding a GMDSS-equipped ship?
  • A conditional or partial exemption may be granted, in exceptional circumstances, for a single voyage outside the sea area for which the vessel is equipped. (27% chose this)
  • The regulations apply to all passenger ships regardless of size and cargo ships of 300 gross tons and upwards. (8% chose this)
  • Ships must have the required equipment inspected at least once every five years. (62% chose this)
  • Ships must carry at least two persons holding a GMDSS Radio Operator's license for Distress and Safety radio-communications purposes. (4% chose this)
Click here to add explanation
Proper watchkeeping includes the following:
  • Monitoring all required frequencies in the proper mode, setting the DSC scanner to 2 MHz, 4 MHZ and 8 MHz for ships in the vicinity, notifying the Master of any Distress alerts. (24% chose this)
  • After silencing an alarm all displays and/or printouts are read, monitoring all required frequencies in the proper mode, notifying the Master of any Distress alerts. (62% chose this)
  • Notifying the Master of any Distress alerts, setting the DSC scanner to 2 MHz, 4 MHZ and 8 MHz for ships in the vicinity, monitoring all required frequencies in the proper mode. (3% chose this)
  • Setting the DSC scanner only to the mandatory 2 MHz & 8 MHz, maintain continuous watch on 2182.0 kHz or 4125.0 kHz, notify the Master of any Distress traffic heard. (10% chose this)
Click here to add explanation
The best way to test the MF-HF SITOR (NBDP) system is:
  • Make a radiotelephone call to a coast station. (4% chose this)
  • Initiate an ARQ call to demonstrate that the transmitter and antenna are working. (8% chose this)
  • Initiate an ARQ call to a Coast Station and wait for the automatic exchange of answerbacks. (75% chose this)
  • Initiate an FEC call to demonstrate that the transmitter and antenna are working. (13% chose this)
Click here to add explanation
Which of the following events will take place immediately after phasing with a Coast Station on an available channel?
  • The ship station begins transmitting the text to the destination telex terminal. (0% chose this)
  • The vessel will request the shore station's answerback to confirm it has reached the correct station. (5% chose this)
  • The ship will transmit the desired command (such as DIRTLX+, OBS+ or AMV+) to the coast radio station. (20% chose this)
  • After exchanging answer-backs (WRU/AAB) the coast station transmits GA+? and awaits a command. (75% chose this)
Click here to add explanation
What is the best procedure for calling another ship station using HF radiotelephone when the signals are weak but readable?
  • Give the name of the ship being called three times, and the words "this is" followed by the name of the ship initiating the call three times, and ending with "over." (30% chose this)
  • Instruct the nearest public correspondence station to add the desired ship's call sign to the station's traffic list. (0% chose this)
  • On a properly selected ITU channel, give the call sign of the ship being called three times using phonetics, then "this is" followed by the call sign of the ship initiating the call three times, using phonetics, and ending with "over." (70% chose this)
  • Notify the local vessel traffic service control station of your intention to contact a specific vessel, and request the VTS operator place the call on channel 22A. (0% chose this)
Click here to add explanation
Which statement concerning frequency band selection and propagation most corresponds with standard practice.
  • Maximum Usable Frequency (MUF) and Optimum Usable Frequency (OUF) should be calculated prior to setting up the transceiver. (9% chose this)
  • Propagation rules, Sunspot cycle status and seasonal variations (winter & summer) must always be employed to calculate the proper band selection. (9% chose this)
  • Propagation "rules of thumb" should be combined with Solar flare alerts to determine band selection. (5% chose this)
  • Propagation "rules of thumb" are usually sufficient for routine operations. (77% chose this)
Click here to add explanation
To set-up the MF/HF Transceiver for a voice call to a coast station, the operator must:
  • Select J3E mode for proper voice operations. (68% chose this)
  • Select J3E mode for proper SITOR (NBDP) operations. (0% chose this)
  • Select F1B mode or J2B mode, depending on the equipment manufacturer. (14% chose this)
  • Select F1B/J2B modes or J3E mode, depending on whether FEC or ARQ is preferred. (18% chose this)
Click here to add explanation
How are paired SSB frequencies normally used?
  • These are normally used for FEC communications with coast radio stations. (19% chose this)
  • These are normally used for J3E communications with coast radio stations. (67% chose this)
  • These are normally used for ARQ communications with coast radio stations. (10% chose this)
  • These are normally used for DSC communications with coast radio stations. (5% chose this)
Click here to add explanation
What sequence of ARQ codes matches the following: Send synoptic weather, switch control from a station currently transmitting over to the receiving station, terminate phasing with coast station.
  • OBS+, +?, BRK+ (39% chose this)
  • OBS+, WRU then Here is, BRK+ (17% chose this)
  • OBS+, GA+?, KKKK (28% chose this)
  • AMV+, +?, KKKK (17% chose this)
Click here to add explanation
What does the term "ARQ" mean in SITOR (NBDP) operations?
  • Automation Repeat Request (15% chose this)
  • Automaton Repeat Request (0% chose this)
  • Automatic Repeat Request (77% chose this)
  • Automatic Request Repeat (8% chose this)
Click here to add explanation
During ARQ communications, which of these is least likely to cause a coast station to immediately break the phased radio connection:
  • If the automatic exchange of answerbacks is interrupted by keyboard entries. (11% chose this)
  • If the error percentage of repeat requests becomes too high. (15% chose this)
  • If the operator enters "KKKK" at the end of the message. (56% chose this)
  • If the BRK+? Command is transmitted after time and charges are received. (19% chose this)
Click here to add explanation
ITU Duplex channels are:
  • Frequency assignments specific to U.S. vessels only. (0% chose this)
  • VHF-FM frequencies. (4% chose this)
  • International Traffic Utility frequencies. (13% chose this)
  • Internationally standardized assignments of frequency pairs for common use. (83% chose this)
Click here to add explanation
During ARQ communications, which of these is least likely to cause a coast station to break the phased radio connection:
  • If the error percentage of repeat requests becomes too high. (5% chose this)
  • If the operator enters "BRK+". (11% chose this)
  • If the automatic exchange of answerbacks is interrupted by keyboard entries. (26% chose this)
  • If the operator enters "NNNN" at the end of the message. (58% chose this)
Click here to add explanation
A "Distress Hot Key" MF/HF DSC Distress alert:
  • Will be transmitted on 2187.5 kHz or another DSC frequency, depending on the manufacturer. (55% chose this)
  • Will always be transmitted on 2187.5 kHz and 8414.5 kHz to trip DSC alarms on the mandatory MF/HF DSC watch frequencies. (18% chose this)
  • Will always be transmitted on 2187.5 kHz first to alert the nearest vessels and coast stations. (23% chose this)
  • Will always be sent first on 16804.5 kHz to reach coast stations far away from the vessel. (5% chose this)
Click here to add explanation
How can a GMDSS operator determine the best frequency band to choose for a SITOR (NBDP) transmission to a shore station?
  • By consulting propagation tables. (16% chose this)
  • Listen to shore station "free signals" and choose the band with the strongest signal. (68% chose this)
  • If static interference is present, try lower bands first. (5% chose this)
  • During nighttime, choose higher frequencies. Choose lower frequencies in the daytime. (11% chose this)
Click here to add explanation
A DSC Distress call is received by your vessel and your transceiver frequency display reads: Transmit = 4207.5 kHz and Receive = 4207.5 kHz with J3E emission -- what information can you infer from this?
  • The DSC call requested voice on 4207.5 kHz simplex but the requested alternate frequency is improper. (38% chose this)
  • The DSC controller decoded the requested voice frequency as 4207.5 kHz simplex and your DSC controller has automatically set-up your transceiver and therefore the requested alternate frequency is correct. (38% chose this)
  • The DSC call came in on 4 MHz DSC. You should set-up your transmitter and respond on the appropriate voice follow-on frequency of 4177.5 kHz. (10% chose this)
  • The DSC call came in on 4 MHz DSC. You should set-up your transmitter and respond on the appropriate voice follow-on frequency of 4207.5 kHz. (14% chose this)
Click here to add explanation
What is a gel cell battery and how is it maintained & cared for?
  • Gel cell batteries are typically sealed; special charging rates and voltages may be required. (71% chose this)
  • Gel cell batteries are lead acid with a solid electrolyte; each cell is checked with a voltmeter. (10% chose this)
  • Gel cell batteries are NICAD with a solid electrolyte; each cell is checked with a voltmeter. (5% chose this)
  • Gel cell batteries are have special liquid electrolytes; they are charged with the NICAD charging rates and voltages. (14% chose this)
Click here to add explanation
Which modes could be selected to receive vessel traffic lists from high seas coast radio stations:
  • AM and VHF-FM (5% chose this)
  • SSB and FEC (41% chose this)
  • ARQ and FEC (45% chose this)
  • VHF-FM and SSB (9% chose this)
Click here to add explanation
For RF communications, "modulation" is best defined as:
  • Using a single carrier frequency with the proper power level. (4% chose this)
  • The combination of information or intelligence on to a radio carrier frequency. (96% chose this)
  • Setting up the transceiver with the correct bandwidth to ensure proper communications. (0% chose this)
  • The combination of the received frequency and oscillator frequency in the mixer. (0% chose this)
Click here to add explanation
The purpose of ITU channel spacing is:
  • To minimize the number of voice & TELEX channels available. (0% chose this)
  • To make most efficient use of the radio spectrum, by using voice channels rather than TELEX channels. (5% chose this)
  • To make most efficient use of the radio spectrum, by using TELEX channels rather than voice channels. (9% chose this)
  • To minimize the possibility of interference from adjacent channels. (86% chose this)
Click here to add explanation
GMDSS operators should routinely focus on the factors affecting propagation in what priority?
  • Distance & time of day, seasonal variations, sunspot cycle, solar flare alerts. (81% chose this)
  • Sunspot cycle, distance & time of day, seasonal variations, solar flare alerts. (0% chose this)
  • Solar flare alerts, distance & time of day, sunspot cycle, seasonal variations. (6% chose this)
  • Solar flare alerts, sunspot cycle, seasonal variations, distance & time of day. (13% chose this)
Click here to add explanation
What are potential dangers of automatic transceiver switching in response to a DSC call?
  • Incorrectly formatted DSC calls from other vessels result in a warning in the DSC alarm screen but the vessel still might be switched to an illegal or improper outcome. (22% chose this)
  • The transceiver may be switched out of the marine bands or the frequency may not match the requested priority or emission. (50% chose this)
  • The automatic transceiver switching software always detects improper priorities, emissions & frequencies to ensure there is no danger. (11% chose this)
  • The automatic transceiver switching feature always interrupting safe navigation of your own vessel and placing the unit on the GMDSS Distress, Urgency or Safety follow-on frequencies. (17% chose this)
Click here to add explanation
Communications with an emission of F1B/J2B would typically have a channel spacing of:
  • 0.3 kHz (5% chose this)
  • 0.5 kHz (67% chose this)
  • 2.8 kHz (5% chose this)
  • 3.0 kHz (24% chose this)
Click here to add explanation
Which would indicate proper operation of a SSB transmitter rated at 60 Watt PEP output in J3E mode?
  • In SITOR (NBDP) communications, the power meter can be seen fluctuating regularly from zero to the 60 watt relative output reading. (52% chose this)
  • In SSB (J3E) mode, speaking into the microphone causes the power meter to fluctuate well above the 60 watt reading. (4% chose this)
  • A steady indication of transmitted energy on an RF power meter with no fluctuations when speaking into the microphone. (4% chose this)
  • In SSB (J3E) voice mode, with the transmitter keyed but without speaking into the microphone, no power output is indicated. (40% chose this)
Click here to add explanation
To make a call to another vessel requesting TELEX communications regarding important company business, the GMDSS operator should:
  • Select Urgency priority, enter other vessel's MMSI, specify legal alternate frequency, F1B emission and transmit the properly formatted DSC call. (9% chose this)
  • Select Routine priority, enter own vessel's MMSI, specify legal alternate frequency, F1B emission and transmit the properly formatted DSC call. (9% chose this)
  • Select Routine priority, enter other vessel's SELCAL for TELEX specify legal alternate frequency, F1B emission and transmit the properly formatted DSC call. (43% chose this)
  • Select Routine priority, enter other vessel's MMSI, specify legal alternate frequency, F1B emission and transmit the properly formatted DSC call. (39% chose this)
Click here to add explanation
What is the normal voltage of a single lead acid battery cell?
  • 1.5 volts (8% chose this)
  • 2.5 volts (0% chose this)
  • 2.1 volts (80% chose this)
  • 1.2 volts (12% chose this)
Click here to add explanation
To correctly address a SITOR (NBDP) message and transmit it "live" to a shore-based office the GMDSS operator would dial which sequence:
  • DIRTLX0051440344+ (19% chose this)
  • DIRTLX051440344+ (33% chose this)
  • DIRTLX581440344+ (14% chose this)
  • DIRTLX05811500260+ (33% chose this)
Click here to add explanation
An incoming Distress priority 16 MHz DSC call requesting J3E emission might automatically switch to what frequency?
  • 16420.0 MHz (30% chose this)
  • 16696.5 kHz (0% chose this)
  • 16420.0 kHz (48% chose this)
  • 16804.5 kHz (22% chose this)
Click here to add explanation
The sequence BFEC, SFEC, ARQ best corresponds to which of the following sequences?
  • One-way communications to a single station, one-way communications to all stations, two-way communications. (23% chose this)
  • One-way communications to all stations, two way communications, one-way communications to a single station. (9% chose this)
  • One-way communications to all stations, one-way communications to a single station, two way communications. (41% chose this)
  • Two way communications, one-way communications to all stations, two-way communications. (27% chose this)
Click here to add explanation
What is the effect of temperature on the specific gravity of lead acid batteries?
  • Higher temperature results in a higher specific gravity reading. (19% chose this)
  • Higher temperature results in a lower specific gravity reading. (71% chose this)
  • Temperature has no effect on the specific gravity reading. (0% chose this)
  • Lower temperature results in a lower specific gravity reading. (10% chose this)
Click here to add explanation
Why is the automatic answerback request (WRU) first used by the LES after an Inmarsat-B TELEX call has been placed from a ship?
  • Let the LES operator know the printer is functioning correctly. (0% chose this)
  • Get the identity of the ship station and start the channel assignment process. (25% chose this)
  • Verify that there is a good connection with no transmission errors. (50% chose this)
  • Identify the SES making the request. (25% chose this)
Click here to add explanation
With most Inmarsat-C systems what should the indicator lamps do when powering up?
  • All lamps should illuminate in a particular sequence, as per the operator's manual. (93% chose this)
  • The power on lamp should illuminate. Other lights remain off until a message is received. (7% chose this)
  • All lamps should light and stay illuminated. (0% chose this)
  • All lamps should light except the RED light. (0% chose this)
Click here to add explanation
What is the primary danger of improperly logging out?
  • The vessel will be barred in the future from sending traffic through an LES. (0% chose this)
  • The NCS ensures that improper log-out procedures do not occur. (4% chose this)
  • Scheduled MSI may not be available through the Inmarsat-C terminal. (22% chose this)
  • Your company or another ship may accrue significant charges when their traffic is repetitively sent to your unavailable terminal. (74% chose this)
Click here to add explanation
Which longitude corresponds to the POR's satellite location for Inmarsat-B/C communications?
  • 64E (13% chose this)
  • 15.5W (17% chose this)
  • 54W (9% chose this)
  • 178E (61% chose this)
Click here to add explanation
Which of the following are correctly formatted Inmarsat-C address book entries for sending communications to two fax machines on vessels in the AOR-W? First is an F77 terminal and second an Inmarsat-B terminal.
  • 870768790319 and then 870334600340 (52% chose this)
  • 8704336837925 and then 870452998777 (14% chose this)
  • 584768790319 and then 584334600340 (29% chose this)
  • 1 870 768790319 and then 1 870 334600340 (5% chose this)
Click here to add explanation
When Inmarsat-B and Inmarsat-C terminals are compared:
  • Inmarsat-B antennas are larger, but omni-directional, while Inmarsat-C antennas are smaller and parabolic, for aiming at the satellite. (25% chose this)
  • Inmarsat-B antennas are parabolic and smaller for higher gain, while Inmarsat-C antennas are larger but omni-directional. (10% chose this)
  • Inmarsat-C antennas are smaller, but omni-directional, while Inmarsat-B antennas are parabolic for lower gain. (0% chose this)
  • Inmarsat-B antennas are larger, but directional for higher gain, while Inmarsat-C antennas are smaller and non-parabolic, and do not require aiming at the satellite. (65% chose this)
Click here to add explanation
Which key is used to indicate the end of a selection in a TELEX call via an Inmarsat-B SES?
  • * (0% chose this)
  • ENTER (4% chose this)
  • # (13% chose this)
  • + (83% chose this)
Click here to add explanation
What is an "Inmarsat Mobile Number"?
  • This identifies the vessel's selective calling (SELCAL) number. (18% chose this)
  • This is the Inmarsat number that is assigned to a unit for incoming or outgoing calls. (68% chose this)
  • This is the vessel's Inmarsat registration number for accounting authority purposes. (14% chose this)
  • This number is used for receiving news and other optional services in FleetNETTM. (0% chose this)
Click here to add explanation
The Inmarsat telephone and TELEX communications channel usage scheme is:
  • One ship per telephone channel and many ships per TELEX channel. (58% chose this)
  • Many ships on the same TELEX analog channel and many ships on the same TDM telephone channel. (21% chose this)
  • One ship per analog telephone channel and one ship per TELEX analog channel frequency. (13% chose this)
  • One ship per channel whether telephone or TELEX. (8% chose this)
Click here to add explanation
Which of the following is a correct dialing sequence for a vessel tracking the AOR-W satellite to send a FAX to a U.S. destination via Southbury LES -- using an Inmarsat-B terminal and charging it to a credit card?
  • 003# 1112125365110# (7% chose this)
  • 001# 3615036943254# (43% chose this)
  • 001+ 110243674932+ (36% chose this)
  • 001# 0015036684376# (14% chose this)
Click here to add explanation
Why is the correct selection of the LES in the Distress Alert Setup menu so crucial?
  • Each LES has its own dedicated RCC whose jurisdiction is defined by the LES selected. (12% chose this)
  • The LES choice determines the nationality of the RCC which will handle the Distress traffic and perform SAR duties or that will pass the particulars to the RCC with jurisdiction to coordinate the SAR situation. (52% chose this)
  • Inmarsat terminals use the GPS position to automatically determine the optimum LES choice in a Distress situation. (24% chose this)
  • The vessel need not select the LES because the NCS will always intercept a Distress priority call and route it to the closest RCC. (12% chose this)
Click here to add explanation
Messages are transmitted by an Inmarsat LES according to what criteria?
  • First In, First Out (9% chose this)
  • Priority (91% chose this)
  • Last In, First Out (0% chose this)
  • Serial Number (0% chose this)
Click here to add explanation
To keep the Inmarsat-B or F77 antenna pointing at the desired satellite, regardless of the ship's position and course, it has an input from the vessel's:
  • Operational radar (0% chose this)
  • Automated Radar Plotting Aid (ARPA equipped radar) (12% chose this)
  • Steering control system (0% chose this)
  • Gyrocompass (88% chose this)
Click here to add explanation
What action should be taken on receipt of a DSC Distress alert?
  • Read the display screen and/or printout, silence the alarm, always call the Master to confirm the alert is real. (17% chose this)
  • Silence the alarm, read the display screen and/or printout and listen for any follow on transmissions. (66% chose this)
  • Listen for any follow on voice/TELEX transmission on the appropriate DSC frequency. (7% chose this)
  • Silence the alarm, read the display screen and/or printout, only call the Master if the alert is within 500 NM. (10% chose this)
Click here to add explanation
The "short rules" of propagation necessary to select the appropriate frequency band are:
  • Shorter distance = Higher Frequency, Daytime = Higher Frequency. (12% chose this)
  • Shorter distance = Lower Frequency, Daytime = Higher Frequency. (69% chose this)
  • Shorter distance = Higher Frequency, Daytime = Lower Frequency. (12% chose this)
  • Shorter distance = Lower Frequency, Daytime = Lower Frequency. (8% chose this)
Click here to add explanation
When requesting a direct TELEX connection to a vessel's Inmarsat-B terminal, (i.e. making a SITOR (NBDP) call to an Inmarsat-B unit) the GMDSS operator must:
  • DIRTLX, 0, Ocean Area Code, TELEX number, +. (30% chose this)
  • DIRTLX, 00, Ocean Area Code, TELEX number, +. (26% chose this)
  • DIRTLX, 0, Country code, TELEX number, +. (26% chose this)
  • DIRTLX, 00, Country code, TELEX number. (17% chose this)
Click here to add explanation
Which of the following is a valid 22-MHz ITU Channel?
  • HF Ch-2206 (67% chose this)
  • VHF Ch-22 (5% chose this)
  • Ch-22A VTS (10% chose this)
  • Ch-70 (DSC only) (19% chose this)
Click here to add explanation
Which of the following is a correctly formatted Inmarsat-C address book entry for sending communications to a fax machine on a vessel's Inmarsat-B terminal in the AOR-E?
  • 581366269025 (31% chose this)
  • 870466269025 (19% chose this)
  • 870323972514 (42% chose this)
  • 581761138138 (8% chose this)
Click here to add explanation
If an Inmarsat Distress Alert Setup menu contains an incorrect or unavailable LES code what happens to the Distress Alert transmission?
  • The NCS updates the LES codes in the Distress Alert Setup menu as the vessel moves from ocean region to ocean region to ensure this does not happen. (16% chose this)
  • The NCS will send a Distress Alert Setup incorrect LES code alarm so the alert can be corrected and re-transmitted. (21% chose this)
  • The NCS will step in and route the Distress Alert transmission to an RCC. (58% chose this)
  • If the LES code is incorrect then the Distress Alert transmission is not detected by any RCC. (5% chose this)
Click here to add explanation
If you are tracking the POR satellite and wish to communicate by voice using LES Santa Paula with another ship tracking the AOR-E satellite what is the proper procedure?
  • Select LES: 001# then dial 00870323972310# (40% chose this)
  • Select LES: 004# then dial 11582430315036# (16% chose this)
  • Select LES: 001# then dial 00851636824323# (32% chose this)
  • Select LES: 003+ then dial 00581430326430+ (12% chose this)
Click here to add explanation
Which longitude corresponds to the IOR's satellite location for Inmarsat-B/C communications?
  • 64E (57% chose this)
  • 178E (19% chose this)
  • 15.5W (19% chose this)
  • 54W (5% chose this)
Click here to add explanation
Which of the following would be a valid sequence to request an automatically dialed ship-ship call to an F77 terminal on a vessel tracking the IOR satellite?
  • 00583430662888# (4% chose this)
  • 00870430662888# (12% chose this)
  • 00583763240864 # (24% chose this)
  • 00870763240864# (60% chose this)
Click here to add explanation
Which of the following is a correctly formatted Inmarsat-C address book entry for sending TELEX communications to two vessels in the POR - the first Inmarsat-C and the second Inmarsat-B?
  • 583452998777 first and 583323500120 second. (13% chose this)
  • 582450302113 first and 582761579051 second. (9% chose this)
  • 582452998777 first and 582323500120 second. (61% chose this)
  • 582600267098 first and 582450302113 second. (17% chose this)
Click here to add explanation
Which of the following statements concerning the EPIRB system is true?
  • GOES weather satellites will provide alerting with complete worldwide coverage. (0% chose this)
  • COSPAS-SARSAT satellites always provides an alert and position report within 10 minutes of reception. (21% chose this)
  • The Inmarsat system will not provide alerts and position report for 406 MHz EPIRBs equipped with GPS receivers. (79% chose this)
  • The GPS satellite system will relay an alert and position report within 20 minutes of reception. (0% chose this)
Click here to add explanation
What system may be useful for messages, such as local storm warnings or a shore-to-ship Distress alert, for which it is inappropriate to alert all ships in the satellite coverage area?
  • EGC (59% chose this)
  • NAVTEX (30% chose this)
  • AMVER (4% chose this)
  • DSC (7% chose this)
Click here to add explanation
A SART's signal cannot be detected:
  • In poor visibility, or at night. (4% chose this)
  • In heavy seas. (4% chose this)
  • By a search vessel's 10 cm Radar. (73% chose this)
  • By a search vessel's 3 cm Radar. (19% chose this)
Click here to add explanation
NAVTEX broadcasts are sent:
  • Immediately following traffic lists. (0% chose this)
  • In categories of messages indicated by a single letter or identifier. (81% chose this)
  • On request of maritime mobile stations. (4% chose this)
  • Regularly, after the radiotelephone silent periods. (15% chose this)
Click here to add explanation
Which of the following statements concerning SITOR (NBDP) communications is true?
  • FEC transmissions are made in data groups consisting of three-character blocks. (52% chose this)
  • FEC transmissions require a "phasing" or "handshaking" process prior to character transmission. (8% chose this)
  • FEC transmissions rely upon an error correction technique, which transmits each character twice. (40% chose this)
  • FEC transmissions rely upon parity and "repeat requests" to ensure error correction. (0% chose this)
Click here to add explanation
Which of the following statements concerning testing and maintenance of SARTs is true?
  • Testing a SART should be done in a consistent manner & location to ensure a baseline history of proper results. (71% chose this)
  • Testing of the SART should never be done in port to prevent interference to other vessel's radars. (25% chose this)
  • A SART's battery must be replaced within ninety (90) days after the expiration date imprinted on the unit. (4% chose this)
  • An at-sea GMDSS maintainer is not able to test a SART because it is hermetically sealed. (0% chose this)
Click here to add explanation
When do NAVTEX broadcasts typically achieve maximum transmitting range?
  • Local noontime (0% chose this)
  • Afternoon (0% chose this)
  • Sunset (0% chose this)
  • Middle of the night (100% chose this)
Click here to add explanation
Which of the following frequencies and modes is allocated for Distress alerting in GMDSS?
  • 406 MHz via EPIRB, 1626.5-1645.5 MHz via Inmarsat and Channel 70 DSC plus six (6) MF/HF DSC frequencies. (60% chose this)
  • 1626.5-1645.5 MHz via Inmarsat, VHF CH-16 plus six (6) MF/HF DSC frequencies, 406 MHz via EPIRB. (12% chose this)
  • Channel 70 DSC plus six (6) MF/HF DSC frequencies, 7 voice follow-on and 6 telex follow-on frequencies. (24% chose this)
  • Mayday on VHF Channel 70 and the other six voice follow-on frequencies. (4% chose this)
Click here to add explanation
Which of the following numbers is appropriate for an Inmarsat-B terminal placing a TELEX call via Southbury to another ship logged-in to the AOR-E?
  • 001+ 00584436824246+ (35% chose this)
  • 001+ 00581436824246+ (47% chose this)
  • 002+ 00584436824246+ (12% chose this)
  • 013+ 00581436824246+ (6% chose this)
Click here to add explanation
Which of these can take place on an Inmarsat-C terminal that has synch with the NCS CC but has not yet performed a successful login?
  • Reception of unscheduled MSI Urgency and Distress messages. (96% chose this)
  • Transmission of synoptic weather reports and company traffic. (0% chose this)
  • Reception of the mandatory scheduled BALD MSI messages. (4% chose this)
  • Reception of company traffic related to ship's business. (0% chose this)
Click here to add explanation
For "On-scene" communications, vessels in Distress and SAR Aircraft should use?
  • VHF Ch-70, 4125 kHz J3E, 5680 kHz J3E (4% chose this)
  • VHF Ch-70, 4125 kHz J2B, 5680 kHz J3E (4% chose this)
  • VHF Ch-16, 4125 kHz F1B, 3023 kHz J3E (15% chose this)
  • VHF Ch-16, 4125 kHz J3E, 3023 kHz J3E (77% chose this)
Click here to add explanation
A DSC Distress alert:
  • Must always be sent on VHF Ch-70. (31% chose this)
  • Will always be sent on one or more of the DSC Distress frequencies. (55% chose this)
  • Must always be sent on MF 2 MHz plus one other HF DSC frequency. (3% chose this)
  • Must always be sent on VHF Ch-70, then 2 MHz MF then 8 MHz HF. (10% chose this)
Click here to add explanation
Which of the following is not a DSC watch frequency?
  • 2187.5 kHz (22% chose this)
  • 2182.0 kHz (52% chose this)
  • 6312.0 kHz (11% chose this)
  • 12577.0 kHz (15% chose this)
Click here to add explanation
Frequencies for receiving HF MSI (Maritime Safety Information) are:
  • The same as used for NAVTEX (39% chose this)
  • The same as used for contact a Coast Radio Station using FEC (4% chose this)
  • Specified HF voice frequencies (4% chose this)
  • Specified HF SITOR (NBDP) frequencies (52% chose this)
Click here to add explanation
The USA-INT control on VHF units:
  • Was made necessary by a desire for more duplex channels in the U.S. (0% chose this)
  • Correctly set, will result in duplex operations in U.S. Coastal waters on the "alpha" channels. (23% chose this)
  • Correctly set, will result in simplex operations in U.S. Coastal waters on the "alpha" channels. (70% chose this)
  • Was made necessary by a desire to convert simplex international channels to duplex channels in the U.S. (7% chose this)
Click here to add explanation
What does the DSC control unit do if the GMDSS Radio Operator fails to insert updated information when initiating a DSC Distress alert?
  • It will initiate the DSC Distress alert and default information will automatically be transmitted. (82% chose this)
  • It will abort the transmission and set off an audible alarm that must be manually reset. (11% chose this)
  • It will initiate the DSC Distress alert but, as no information will be transmitted, rescue personnel will not be able to identify the vessel, its position, or its situation. (4% chose this)
  • It will initiate the DSC Distress alert, but any station receiving it will have to establish contact with the distressed vessel to determine its identity, position, and situation. (4% chose this)
Click here to add explanation
What is the purpose of a CODEC?
  • Noise and echo-canceling used in TELEX operation. (0% chose this)
  • To enable Distress communications. (0% chose this)
  • To enable data communications. (9% chose this)
  • To convert analog voice signals to digital transmissions. (91% chose this)
Click here to add explanation
If a HF-DSC Distress alert is transmitted what frequency is used for follow-on voice transmission?
  • 8376.5 kHz (14% chose this)
  • 8291.0 kHz (61% chose this)
  • 8401.5 kHz (4% chose this)
  • 8201.0 kHz (21% chose this)
Click here to add explanation
What part of a satellite EPIRB may function as a visual aid to rescue vessels?
  • Strobe light (92% chose this)
  • A 121.5 MHz emergency transmitter in a satellite EPIRB. (8% chose this)
  • 406 MHz signal from a satellite EPIRB. (0% chose this)
  • Loud beeping tone emitted by the unit, once activated. (0% chose this)
Click here to add explanation
Which of the following is a correctly formatted Inmarsat-C address book entry for sending communications to a shoreside terminal number 276992 in New Jersey via TRT (TELEX country code 238)?
  • 238276992 (76% chose this)
  • (238)276992 (0% chose this)
  • 238276992# (0% chose this)
  • 238276992+ (24% chose this)
Click here to add explanation
Which of the following statements concerning COSPAS-SARSAT is false?
  • EPIRBs, ELTs, and PLBs use the system primarily for Distress alerting. (0% chose this)
  • These satellites monitor 406 MHz for EPIRB signals. (7% chose this)
  • After initiating a call request and selecting the LES, these satellites may be used for commercial messages. (85% chose this)
  • These satellites use Doppler shift measurement to determine the location of the beacons. (7% chose this)
Click here to add explanation
How are NAVTEX broadcasts transmitted?
  • NAVTEX is transmitted by commercial coast radio stations following their traffic lists. (14% chose this)
  • NAVTEX is transmitted only when an Urgency or Distress broadcast is warranted. (7% chose this)
  • Using FEC techniques. (69% chose this)
  • No more often than every two hours and should immediately follow the radiotelephone silent periods. (10% chose this)
Click here to add explanation
Which statement best defines the SITOR (NBDP) acronym "BFEC"?
  • Error correction for one-way TELEX broadcasts of weather or navigation information. (35% chose this)
  • Error Correction when 2 stations are in direct & phased telephone communications with each other. (5% chose this)
  • Error Correction when 2 stations are in direct & phased TELEX communications with each other. (35% chose this)
  • Error correction when 1 station sends a one-way TELEX to a single other station. (25% chose this)
Click here to add explanation
What maintenance function may the holder of a GMDSS Radio Operator license perform, or supervise the performance of, on an Inmarsat-C SES?
  • Adjust the station's EIRP (power output ) for improved signal levels. (17% chose this)
  • Enter Azimuth and Elevation values correctly so the Inmarsat-C SES can find the NCS CC. (22% chose this)
  • Remove stack deposits and other debris from the antenna to prevent degraded performance. (56% chose this)
  • Adjust a reference oscillator or synthesizer to tune the unit to the NCS CC. (6% chose this)
Click here to add explanation
How is an Inmarsat Distress priority message ordinarily initiated on board the vessel?
  • By pressing one or more dedicated "Distress key" controls on the equipment. (84% chose this)
  • By dialing the correct code on the telephone remote unit. (4% chose this)
  • By contacting the LES operator and announcing a Distress condition is in progress. (8% chose this)
  • By contacting the LES operator using the radiotelephone Distress procedure "Mayday"... etc. (4% chose this)
Click here to add explanation
What information should be contained in a detailed Distress message that was not transmitted by an initial Distress "hot-key" alert?
  • Vessel position, course & speed and the nature of Distress. (13% chose this)
  • The distress vessel's IMN and position at the time of alert. (0% chose this)
  • Vessel name & call sign, POB and all potential means to communicate with the vessel. (71% chose this)
  • Vessel name & call sign, distress vessel's IMN & vessel position. (17% chose this)
Click here to add explanation
Which frequency/mode is authorized for use internationally for Maritime Safety Information transmissions?
  • 4209.5 kHz using FEC mode (48% chose this)
  • 4209.5 kHz using ARQ mode (17% chose this)
  • 4125.0 kHz using simplex mode (3% chose this)
  • 4125.0 kHz using FEC mode (31% chose this)
Click here to add explanation
Which of the following is a correctly formatted Inmarsat-C address book entry for sending TELEX communications to an Inmarsat-B terminal in the AOR-W?
  • 584765044177 (5% chose this)
  • 584331014013 (55% chose this)
  • 870331014013 (18% chose this)
  • 584331014013+ (23% chose this)
Click here to add explanation
How are normal working conditions restored on a SITOR (NBDP) frequency on which radio silence had been imposed?
  • The LES that imposed the radio silence must transmit a SITOR (NBDP) message stating "SILENCE FINI". (12% chose this)
  • The Public Correspondence Station (PCS) that imposed the radio silence must transmit a narrow band direct printing message on the Distress frequency stating "SILENCE FINI". (0% chose this)
  • The RCC or Coast station that imposed the radio silence must transmit a SITOR (NBDP) message stating "SILENCE FINI". (88% chose this)
  • The High Seas Service (HSS) that imposed the radio silence must transmit a narrow band direct printing message on the Distress frequency stating "SILENCE FINI". (0% chose this)
Click here to add explanation
Which of the following statements is true regarding Distress alerting under GMDSS?
  • Ship to shore Distress alerts are used to alert other ships in port of navigational hazards. (0% chose this)
  • The Distress alert should identify the station in Distress and its position & time of position update. Also, the alert may include the nature of the Distress, the type of assistance required, or the course and speed of the mobile unit. (92% chose this)
  • Ship-to-ship Distress alerts are used to alert other ships in the vicinity of navigational hazards and bad weather. (8% chose this)
  • The vessel nearest to the emergency must notify the Coast Guard before leaving the vicinity. (0% chose this)
Click here to add explanation
For RF communications, "bandwidth" is best defined as:
  • The modulation technique required to insure proper ITU channel spacing. (9% chose this)
  • The emission designation resulting from the desired modulation technique. (0% chose this)
  • The portion of the radio spectrum consumed by a particular emission selection and modulation technique. (91% chose this)
  • The portion of the radio spectrum reserved for frequency allocations by the ITU. (0% chose this)
Click here to add explanation
A vessel is experiencing problems tracking the satellite in an Inmarsat-C SES while at sea. The problem is least likely caused by?
  • Extremely heavy rain/snow storms. (31% chose this)
  • Local RF interference by in-port cell phone or other radio systems. (31% chose this)
  • Shadowing caused by an obstacle, such as a mast, between the SES antenna and the satellite. (31% chose this)
  • The vessel is on the fringe of the coverage area of the satellite. (8% chose this)
Click here to add explanation
To request medical assistance from Inmarsat via voice (using an Inmarsat-B SES) what would be the correct procedure?
  • Enter 36# and then the phone number for the Inmarsat medical advisory system. (14% chose this)
  • Enter 32# and then the phone number for the Inmarsat medical advisory system. (14% chose this)
  • Enter 32# to request the Inmarsat medical advisory system. (45% chose this)
  • Enter 32+ to request the Inmarsat medical advisory system. (27% chose this)
Click here to add explanation
Which of the following factors does not normally affect the range of VHF transmissions?
  • Salt water ingress into the antenna coaxial cable. (14% chose this)
  • Power level setting. (3% chose this)
  • Ionospheric refraction. (83% chose this)
  • Vessel antenna height. (0% chose this)
Click here to add explanation
Equipment for radiotelephony use in survival craft stations under GMDSS must have what characteristics?
  • Permanently-affixed antenna, watertight, power 1W or 25W. (4% chose this)
  • Watertight, power a minimum of 1W, operation on CH-16, Ch-13 & Ch-70. (4% chose this)
  • Operation on Ch-16, watertight, permanently-affixed antenna. (92% chose this)
  • Operation on Ch-16, Ch-13 & Ch-70, power 1W, permanently-affixed antenna. (0% chose this)
Click here to add explanation
A manual ship-ship ARQ message would typically begin with what sequence of ARQ procedures?
  • Initiate call with CS selcal, observe exchange of answer-backs (WRU-AAB), send message. (17% chose this)
  • Initiate call with ship selcal, enter "HERE IS" then "WRU" commands and send message. (21% chose this)
  • After phasing with the other vessel, observe exchange of answer-backs (WRU-AAB), send message and then KKKK to end the transmission. (25% chose this)
  • After phasing with the other vessel then send GA+? to determine if they are ready to receive your message. (38% chose this)
Click here to add explanation
What features may be found on GMDSS satellite EPIRB units?
  • Strobe light, Distress homing transmission on 406 MHz, float-free release bracket. (26% chose this)
  • Emergency transmission on 406 MHz, hydrostatic release, AIS homing frequency. (9% chose this)
  • Float-free release bracket, strobe light & Distress alert transmission on 406 MHz. (65% chose this)
  • Hydrostatic release, Distress alert transmission on 121.5 MHz, strobe light. (0% chose this)
Click here to add explanation
When logging into the Inmarsat system using Inmarsat-C, it is necessary to:
  • Enter your IMN. (8% chose this)
  • Select the Ocean Region. (88% chose this)
  • Enter the LES answer back. (4% chose this)
  • Call the LES and inform them that you are now operating in the appropriate ocean region. (0% chose this)
Click here to add explanation
Which one of the following is a ship station SELCAL?
  • 1104 (22% chose this)
  • 1502352 (9% chose this)
  • 11243 (61% chose this)
  • 0230364973 (9% chose this)
Click here to add explanation
Which is not a function of a satellite under COSPAS-SARSAT using satellite EPIRBs?
  • Relayed satellite message includes the EPIRB ID number which provides a reference for retrieval of vessel information from the shore database. (8% chose this)
  • Doppler shift of EPIRB signal is measured and the EPIRB's position is calculated. (21% chose this)
  • Information received from EPIRBs is time-tagged and transmitted to any Local User Terminal in the satellite's view. (8% chose this)
  • After the EPIRB's position is calculated using the Doppler shift COSPAS-SARSAT satellites provide follow-on SAR communications. (63% chose this)
Click here to add explanation
A vessel operating in the Western Atlantic or along the East coast of North America and Central America from Canada to Venezuela, including the Caribbean and Panama, would be located in which NAVAREA?
  • X (0% chose this)
  • XI (7% chose this)
  • IV (82% chose this)
  • XIII (11% chose this)
Click here to add explanation
Which of the following statements concerning MMSI is false?
  • All Coast Station MMSI must begin with 2 zeros. (12% chose this)
  • All Coast Station MMSI must begin with the MID then 2 zeros. (65% chose this)
  • A group call must begin with a single zero followed by the MID. (8% chose this)
  • The first 3 digits of a ship MMSI comprise the MID. (15% chose this)
Click here to add explanation
If your vessel is in the POR, which of the following is a correctly formatted Inmarsat-C address book entry for sending communications to a shoreside TELEX terminal number 42267 in Ecuador (TELEX country code 308)?
  • 58230842267 (26% chose this)
  • 30842267+ (19% chose this)
  • (582)30842267 (0% chose this)
  • 30842267 (56% chose this)
Click here to add explanation
What is the primary function of an NCS?
  • To provide direct communications between the Inmarsat station placing a call and the station receiving the call. (25% chose this)
  • To provide multi-mode communications between the Inmarsat station placing a call and the coast radio station that will deliver it. (17% chose this)
  • To determine which satellite is best suited to provide communications between the Inmarsat station placing a call and the station receiving the call. (13% chose this)
  • To monitor and control communications through the Inmarsat satellite for which it is responsible. (46% chose this)
Click here to add explanation
Which of the following is a correctly formatted Inmarsat-C address book entry for sending communications to a fax machine number 516-229-4339 in Long Beach, CA, U.S.?
  • 015162294339# (10% chose this)
  • 15162294339 (45% chose this)
  • 015162294339 (45% chose this)
  • 1 516-229-4339 (0% chose this)
Click here to add explanation
Which of the following would indicate an Inmarsat-B terminal?
  • 003662517 (7% chose this)
  • 436682011 (3% chose this)
  • 325468325 (86% chose this)
  • 1500241 (3% chose this)
Click here to add explanation
Which sequence is associated with the 5 new Arctic Ocean NAVAREAs?
  • NAVAREA XVIII, NAVAREA XX, NAVAREA XXI (71% chose this)
  • NAVAREA III, NAVAREA VII, NAVAREA XV (14% chose this)
  • NAVAREA IV, NAVAREA XII, NAVAREA X (11% chose this)
  • NAVAREA XII, NAVAREA X, NAVAREA XI (4% chose this)
Click here to add explanation
Which messages are mandatory to be received and should not typically be rejected or disabled by the operator of a NAVTEX receiver?
  • Navigational warnings, meteorological warnings, SAR information. (97% chose this)
  • Meteorological warnings, SAR information, Pilot Service Messages. (0% chose this)
  • Meteorological warnings, meteorological forecasts, navigational warnings. (3% chose this)
  • SAR information, navigational warnings, ice reports. (0% chose this)
Click here to add explanation
When the GMDSS Radio Operator on watch hears "Securite" spoken three times, he can expect to receive the following information:
  • The safety of vessel or person is in jeopardy. (7% chose this)
  • A message concerning the Safety of navigation. (89% chose this)
  • A vessel is in need of immediate assistance. (0% chose this)
  • A Coast Station sending an important traffic list. (4% chose this)
Click here to add explanation
What information should be sent in a detailed satellite Distress message that was not included in the initial "hot-key" Distress Alert?
  • Name/Call sign of vessel, vessel position, vessel description, all vessel I.D. numbers, LES code for Distress traffic. (18% chose this)
  • POB, vessel description, all vessel I.D. numbers, shore contact numbers, vessel position. (12% chose this)
  • Name/Call sign of vessel, POB, vessel description, all vessel I.D. numbers and shore contact numbers. (29% chose this)
  • Name/Call sign of vessel, nature of Distress, POB, vessel description and all vessel I.D. numbers. (41% chose this)
Click here to add explanation
Which statement is NOT true regarding the requirements of survival craft portable two-way VHF radiotelephone equipment?
  • Watertight to a depth of 1 meter for 5 minutes. (4% chose this)
  • Operates simplex on Ch-70 and at least one other channel. (88% chose this)
  • Effective radiated power should be a minimum of 0.25 Watts. (8% chose this)
  • The antenna is fixed and non-removable. (0% chose this)
Click here to add explanation
Which of the following frequencies have been designated for "On-scene" communications in the Global Maritime Distress and Safety System?
  • VHF Ch-22 (4% chose this)
  • VHF Ch-16 and SITOR (NBDP) on 2174.5 kHz. (83% chose this)
  • HF radiotelephone on 21.820 MHz. (4% chose this)
  • SITOR (NBDP) on 2177.0 kHz and VHF Ch-16. (9% chose this)
Click here to add explanation
What means are used to prevent the reception of unwanted broadcasts by vessels utilizing the NAVTEX system?
  • Programming the receiver to reject certain stations and message categories. (96% chose this)
  • Operating the receiver only during daytime hours. (0% chose this)
  • Coordinating reception with published broadcast schedules. (4% chose this)
  • Automatic receiver de-sensitization during night hours. (0% chose this)
Click here to add explanation
What would be an indication of a malfunction on a GMDSS station with a 24 VDC battery system?
  • All of these symptoms would indicate a potential battery charger malfunction. (12% chose this)
  • After testing the station on battery power, a voltmeter reading of 30 volts for a brief period followed by a steady 26 volt reading. (12% chose this)
  • A constant 30 volt reading on the GMDSS console voltmeter. (65% chose this)
  • After testing the station on battery power, the ammeter reading indicates a high rate of charge that then declines. (12% chose this)
Click here to add explanation
A vessel loses Inmarsat-B SES operation after a large course change. Which of the following could most likely cause this?
  • Shadowing of the SES antenna by clouds or other weather formations. (24% chose this)
  • Misalignment of the shadow correction filter. (5% chose this)
  • The vessel sailed beyond the footprint of the satellite coverage. (29% chose this)
  • System loses gyro follow-up or a gyro system malfunction. (43% chose this)
Click here to add explanation
While conducting routine communications using the wheelhouse VHF with a station 1 mile distant, your recommended power setting would be:
  • 25 watts after dark. (0% chose this)
  • 1 watt, day or night. (92% chose this)
  • 25 watts during a clear sunny day. (8% chose this)
  • 1 watt using DSC at night. (0% chose this)
Click here to add explanation
How is maximum coverage provided by satellites in the maritime satellite service?
  • Four satellites in polar orbit. (10% chose this)
  • Four satellites in geo-stationary orbit for each Inmarsat Service (B, C, F77 and M). (14% chose this)
  • Four satellites in geo-stationary orbit approximately 22,184 miles above the equator. (57% chose this)
  • Through coordinated use of COSPAS-SARSAT satellites. (19% chose this)
Click here to add explanation
What is an MRN?
  • Mobile Registration Number, provided by the FCC. (27% chose this)
  • Mobile Registration Number, provided by IMO. (18% chose this)
  • Message Reference Number, provided by the LES. (55% chose this)
  • Vessel's call sign (0% chose this)
Click here to add explanation
BFEC SITOR (NBDP) transmissions might be used to?
  • Receive Coast station traffic lists, NAVTEX and VHF MSI broadcasts. (33% chose this)
  • Send and receive Distress TELEX communications and receive HF MSI or NAVTEX. (38% chose this)
  • Receive weather messages or download ARQ Coast Station traffic lists. (14% chose this)
  • Receive weather messages and send vessel weather OBS messages. (14% chose this)
Click here to add explanation
What feature is not a component of a 406 MHz satellite EPIRB?
  • 121.5 MHz emergency homing transmitter. (21% chose this)
  • Emergency transmission on 406.025 MHz. (4% chose this)
  • Float-free release bracket. (0% chose this)
  • Aural locator signal. (75% chose this)
Click here to add explanation
On an Inmarsat-C system, what is the importance of a successful "SYNC" indication after power up?
  • The system is not yet locked on to the NCS signal until a log-in command is performed. (9% chose this)
  • Sufficient signal strength on the NCS common channel is being received. (35% chose this)
  • There is company telex traffic being received on the NCS common channel. (0% chose this)
  • The NCS has confirmed log-in status is on so routine traffic can be sent and received. (57% chose this)
Click here to add explanation
Which satellite should be chosen when operating in the Eastern Gulf of Mexico?
  • POR (0% chose this)
  • IOR (0% chose this)
  • AOR-W (76% chose this)
  • AOR-E (24% chose this)
Click here to add explanation
What is the average length of time required for a TELEX sent by Inmarsat-C to be delivered to the addressee?
  • All Inmarsat-C communications are made with real-time connectivity so there is no delay in message delivery. (10% chose this)
  • The average delivery time for a message sent by Inmarsat-C is about 10 minutes. (62% chose this)
  • Date/time notification of delivery is possible only through Inmarsat-B. (0% chose this)
  • The average delivery time for a TELEX sent by Inmarsat-C is about 10 minutes, but fax and data messages sent by Inmarsat-C require about 30 minutes for delivery. (29% chose this)
Click here to add explanation
What must be done to disconnect an incoming TELEX message when voice Distress communications is desired via Inmarsat-B?
  • Momentarily turn off the system power. (15% chose this)
  • Depressing the "Distress" button automatically disconnects incoming messages. (55% chose this)
  • It is necessary to wait until the incoming TELEX message has concluded otherwise a system fault will occur. (20% chose this)
  • Depress the "Reset" switch to disconnect incoming message. (10% chose this)
Click here to add explanation
How can reception of certain NAVTEX broadcasts be prevented?
  • Stations are limited to daytime operation only. (0% chose this)
  • Coordinating reception with published broadcast schedules. (0% chose this)
  • The receiver can be programmed to reject certain stations and message categories. (100% chose this)
  • Automatic receiver desensitization during night hours. (0% chose this)
Click here to add explanation
Which of the following channels and modes should be used when initiating a Distress alert transmission?
  • Ch-6 DSC (0% chose this)
  • Ch-6 Radiotelephony (3% chose this)
  • Ch-70 DSC (83% chose this)
  • Ch-13 Radiotelephony and Ch-16 DSC (14% chose this)
Click here to add explanation
Selective FEC communications (SFEC) are employed when:
  • Multiple stations without a group SELCAL must receive communications without using their transmitters (Radio Silence). (25% chose this)
  • Multiple stations must receive communications by using their transmitters to achieve phasing. (13% chose this)
  • An individual station must receive communications by using their transmitter to achieve phasing and block other stations from breaking in. (19% chose this)
  • An individual station must receive communications without using any transmitters (Radio Silence). (44% chose this)
Click here to add explanation
FEC SITOR (NBDP) transmissions are normally used to?
  • Receive Coast station traffic lists, NAVTEX and VHF MSI broadcasts. (18% chose this)
  • Receive weather messages, Coast Station traffic lists and company messages. (9% chose this)
  • Receive HF MSI and NAVTEX. (68% chose this)
  • Receive company communications sent through coast stations. (5% chose this)
Click here to add explanation
What is the primary function of a LES?
  • To provide direct communications between the Inmarsat station placing a call and the station receiving the call. (30% chose this)
  • To monitor and control communications through the Inmarsat satellite for which it is responsible. (39% chose this)
  • To provide multi-mode communications between the Inmarsat station placing a call and the coast radio station that will deliver it. (17% chose this)
  • To determine which satellite is best suited to provide communications between the Inmarsat station placing a call and the station receiving the call. (13% chose this)
Click here to add explanation
"SITOR (NBDP)" communications are based on a digital code system:
  • Consisting of 7 bits, with four zeros and three ones. (69% chose this)
  • Consisting of 7 bits, with four ones and three zeroes. (19% chose this)
  • Consisting of 5 bits TELEX and 8 bits Fax. (4% chose this)
  • Consisting of 5 bits for ship stations and 7 bits for shore stations. (8% chose this)
Click here to add explanation
Which of the following has been designated for "On-scene" communications in GMDSS?
  • Ch-24 (0% chose this)
  • Ch-2182 (5% chose this)
  • Ch-70 (5% chose this)
  • Ch-16 (91% chose this)
Click here to add explanation
Which of the following is a correctly formatted Inmarsat-C address book entry for sending TELEX communications to a vessel in the AOR-E?
  • 870436772983 (32% chose this)
  • 571436772983 (21% chose this)
  • 581323500120+ (16% chose this)
  • 581323500120 (32% chose this)
Click here to add explanation
What number will a ship station use to identify itself using SITOR (NBDP)?
  • Four digit SELCAL. (21% chose this)
  • Five digit SELCAL or 9 digit SELCAL number identical to MMSI. (69% chose this)
  • 9 digit Inmarsat-B I. D. number. (0% chose this)
  • 9 digit Inmarsat-C I.D. number. (10% chose this)
Click here to add explanation
During SITOR (NBDP) ARQ operations through a coast station, what should the GMDSS operator do during the "Automatic Exchange of Answerbacks"?
  • Do nothing other than wait for a GA+? prompt and then issue the desired command. (71% chose this)
  • Send a "WRU" then a "Here is" when requested to do so by the coast station. (14% chose this)
  • Send the necessary message file and then wait for time and charges. (0% chose this)
  • Wait for the coast station to transmit a menu of possible commands and select the desired action. (14% chose this)
Click here to add explanation
In FM communications, the information is applied to the carrier by:
  • Varying the frequency of the carrier to convey the information to other stations. (58% chose this)
  • Varying the amplitude or the frequency of the carrier, depending on Double or Single-Sideband operations. (5% chose this)
  • Varying only the frequency of the carrier, depending on Double or Single-Sideband operations. (16% chose this)
  • Varying the amplitude of the carrier and keeping the frequencies in the sidebands constant. (21% chose this)
Click here to add explanation
How many digits are in the MID (Maritime Identification Digits)?
  • 3 (71% chose this)
  • 7 (4% chose this)
  • 9 (21% chose this)
  • 10 (4% chose this)
Click here to add explanation
How is a MSI (Maritime Safety Information) broadcast received by an Inmarsat-C SES that is engaged in communications?
  • The broadcast message is missed and the Radio Operator must request a retransmission. (0% chose this)
  • The broadcast message is stored in the EGC memory and will automatically be printed at the conclusion of the ongoing traffic. (55% chose this)
  • There is no loss of information since broadcasts of "vital" messages will be repeated. (45% chose this)
  • The radio operator can request retransmission of messages missing from numeric serial number succession. (0% chose this)
Click here to add explanation
What statement is true regarding Inmarsat-C?
  • There is a propagation delay, but a direct connection is made between the ship and shore users. (0% chose this)
  • There are delays in establishing communications. Then a direct real-time connection is maintained with the other party. (0% chose this)
  • The TELEX message is stored until the mailbox is accessed by the station desiring to retrieve their message. (8% chose this)
  • This is a store and forward network, with an intermediate step that means there is no direct connection between ship and shore users. (92% chose this)
Click here to add explanation
The purpose of "parity" in SITOR (NBDP) communications is?
  • Error correction in HF BFEC MSI broadcasts, SFEC NAVTEX broadcasts and two way ARQ exchanges. (32% chose this)
  • Error correction in SFEC NAVTEX broadcasts, HF SFEC MSI broadcasts and two-way ARQ exchanges. (21% chose this)
  • Error correction in BFEC NAVTEX broadcasts, HF BFEC MSI broadcasts and one-way ARQ broadcasts. (11% chose this)
  • Error correction in HF BFEC MSI broadcasts, NAVTEX broadcasts and two-way ARQ exchanges. (37% chose this)
Click here to add explanation
Over what system are Enhanced Group Calls transmitted?
  • COSPAS satellite (9% chose this)
  • Inmarsat satellite (64% chose this)
  • HF SITOR (NBDP) shore stations (27% chose this)
  • NAVTEX shore stations (0% chose this)
Click here to add explanation
A vessel on a voyage between Miami and Los Angeles via the Panama Canal would be operating in which NAVAREAS?
  • II and III (0% chose this)
  • IV and V (35% chose this)
  • V and VI (0% chose this)
  • IV and XII (65% chose this)
Click here to add explanation
Which of the following EPIRBs is most likely to be used to transmit a Distress alert signal?
  • S-Band EPIRBs (4% chose this)
  • X-Band EPIRBs (4% chose this)
  • 406 MHz EPIRBs (92% chose this)
  • 121.5/243 MHz EPIRBs (0% chose this)
Click here to add explanation
What are the best resources for researching and planning equipment setups and updates prior to any potential Distress situation?
  • NGA Pub. 117, Inmarsat handbook or manufacturer's equipment manuals. (26% chose this)
  • Inmarsat handbook, FCC Part 80 or ITU List of Coast stations. (29% chose this)
  • ITU List of Coast stations, IMO GMDSS handbook, FCC Part 80. (13% chose this)
  • Inmarsat handbook, NGA Pub, 117 or ITU List of Coast stations. (32% chose this)
Click here to add explanation
Which mode of Inmarsat-B communications may be possible with a lower received signal strength?
  • Fax (15% chose this)
  • Voice Communications (15% chose this)
  • TELEX (70% chose this)
  • Binary computer file transfers (0% chose this)
Click here to add explanation
What determines whether a NAVTEX receiver prints a particular type of message content from a programmed NAVTEX station?
  • The serial number and type of message have already been received but additional printouts are generated to ensure receipt aboard the vessel. (0% chose this)
  • The subject indicator has been programmed for rejection by the operator but the message contains a priority override print command. (17% chose this)
  • The transmitting station ID covering your area has been programmed for rejection by the operator or has not been previously received. (21% chose this)
  • The serial number and type of message has not been previously received or the subject indicator has not been programmed for rejection. (63% chose this)
Click here to add explanation
Which of the following statements is true?
  • No NAVTEX receiver can be programmed to reject category A, B, D and L messages since they are mandatory to be received via NAVTEX. (28% chose this)
  • Upon entering a new NAVTEX station's broadcast range, the GMDSS Radio Operator enters the station's SELCAL number. (12% chose this)
  • The GMDSS Radio Operator can select the "None" option in the message category menu. (4% chose this)
  • A GMDSS Radio Operator may choose to program certain NAVTEX receivers to reject category A, B, D and L messages if they are being received by another MSI system. (56% chose this)
Click here to add explanation
What information is promulgated by the international SafetyNETTM?
  • Traffic Lists (4% chose this)
  • MSI (89% chose this)
  • Priority Messages (7% chose this)
  • MARAD (0% chose this)
Click here to add explanation
A Distress Priority DSC call may be formatted and transmitted specifying and requesting:
  • Nature of Distress, vessel position, follow-on frequency, only voice follow-on communications. (32% chose this)
  • Nature of Distress or alternate frequency but not both in a single call, vessel position or alternate frequency/emission but not both in a single call, voice or TELEX follow-up communications. (32% chose this)
  • Nature of Distress or alternate frequency but not both in a single call, vessel position or alternate frequency/emission but not both in a single call, only TELEX follow-up communications (9% chose this)
  • Nature of Distress, vessel position, follow-on frequency, only TELEX follow-on communications. (27% chose this)
Click here to add explanation
Which of the following statements concerning EPIRBs is false?
  • The COSPAS-SARSAT system may take a full hour or more to provide an alert. (41% chose this)
  • The Inmarsat system provides worldwide coverage for Distress alerts. (30% chose this)
  • The GOES weather satellites are in a geostationary orbit. (7% chose this)
  • 406 MHz EPIRB units may be equipped with GPS receivers. (22% chose this)
Click here to add explanation
Which functions may the holder of a GMDSS Radio Operator License not perform on the Inmarsat-C equipment?
  • Selection of LES for routine traffic. (6% chose this)
  • Maintain the antenna clear of soot, paint, etc. (0% chose this)
  • Adjust the azimuth and elevation values. (94% chose this)
  • Logon, traffic and logoff functions. (0% chose this)
Click here to add explanation
Proper and legal VHF operations require all of these except?
  • The channel must be designated as valid for the nature or type of communications desired. (15% chose this)
  • Simplex, duplex and alpha channel modes must be correctly selected. (4% chose this)
  • The power level must be appropriately chosen by the operator. (19% chose this)
  • The correct bandwidth must be selected by the operator. (63% chose this)
Click here to add explanation
SafetyNETTM messages can be received by which of the following shipboard equipment?
  • NAVTEX (13% chose this)
  • MF and HF SITOR (NBDP) (13% chose this)
  • Inmarsat-C EGC receiver (67% chose this)
  • Inmarsat F77 EGC receiver (8% chose this)
Click here to add explanation
How can vessel personnel detect the operation of a SART in its vicinity?
  • A unique two-tone "warbling" signal heard on VHF-FM Ch-70. (0% chose this)
  • It will activate an AIS new signal alarm on the AIS receiver. (7% chose this)
  • The SART signal appears as a target that comes and goes--due to the effect of heavy swells on a SART. (0% chose this)
  • A unique 3-cm signal consisting of a 12-dot pattern radiating outward from a SART's position along its line of bearing. (93% chose this)
Click here to add explanation
DSC transmissions are received:
  • Using voice or TELEX modes as appropriate. (6% chose this)
  • Using J3E or H3E modes as appropriate. (27% chose this)
  • Using digital decoding by the DSC controller. (39% chose this)
  • Using F1B and/or J2B decoding by the transceiver. (27% chose this)
Click here to add explanation
What is the best method for a GMDSS Radio Operator to determine which SITOR (NBDP) station to contact for the purpose of sending a chargeable message or cable?
  • Listen to each station's "free signals" and call the strongest station. (71% chose this)
  • Listen to each station's voice announcement and determine which channel(s) will be monitored. (12% chose this)
  • Listen to each station's MSI broadcast to determine which public correspondence station to contact. (6% chose this)
  • Listen to the U.S. Coast Guard's traffic list to determine which Coast Guard station will handle commercial traffic. (12% chose this)
Click here to add explanation
Which action should the GMDSS radio operator take in a Distress situation when embarking in survival craft?
  • EPIRB and SART switched on manually prior to embarking; remain aboard vessel in Distress. (12% chose this)
  • Notify RCC (Rescue Coordination Center) through VHF DSC in portable equipment. (0% chose this)
  • Switch on EPIRB and SART immediately and leave on. (88% chose this)
  • Communicate via Inmarsat-C from the survival craft. (0% chose this)
Click here to add explanation
What keyboard entry would you make on an Inmarsat-B terminal for an automatic TELEX connection to 882419 in Nebraska, USA (TELEX country code 230)?
  • 11230882419+ (4% chose this)
  • 00230882419# (4% chose this)
  • 00230882419+ (68% chose this)
  • 00230882419 (25% chose this)
Click here to add explanation
Which of the following channels is designated as the VHF follow-on communications channel and is required in all portable survival craft equipment?
  • Ch-16 (93% chose this)
  • Ch-6 (0% chose this)
  • Ch-13 (0% chose this)
  • Ch-70 (7% chose this)
Click here to add explanation
Which of the following situations would normally use the Urgency priority?
  • A collision with the ship taking on water. (8% chose this)
  • A serious medical situation involving a crewmember. (75% chose this)
  • Important company communications related to an itinerary change. (0% chose this)
  • Scenarios concerning the Safety of navigation or important meteorological warnings. (17% chose this)
Click here to add explanation
Where NAVTEX cannot be feasibly established, what system can be implemented to provide an automated service in coastal waters to receive MSI?
  • AMVER (7% chose this)
  • VHF DSC (4% chose this)
  • ARQ SITOR (NBDP) (0% chose this)
  • SafetyNETTM (89% chose this)
Click here to add explanation
Which statement regarding bandwidth and channel spacing is correct:
  • Bandwidth values are a function of channel spacing values. (22% chose this)
  • Channel spacing values are not a function of bandwidth values. (9% chose this)
  • Channel spacing values are a function of bandwidth values. (61% chose this)
  • Bandwidth & channel values do not vary with emission mode. (9% chose this)
Click here to add explanation
Your ship received a Distress relay from a coast station on DSC VHF channel 70. What action should the watch officer take?
  • Retransmit the DSC call on Ch-70 to other vessels in the vicinity. (15% chose this)
  • Monitor Ch-06 to determine if there are any genuine Distress communications. (0% chose this)
  • Monitor Ch-16 to determine if there are any genuine Distress communications. (85% chose this)
  • Transmit a voice "Mayday Relay" call on Ch-13. (0% chose this)
Click here to add explanation
If a VHF-DSC Distress alert is transmitted what channel is used for follow-on voice transmission?
  • Ch-12 (0% chose this)
  • Ch-70 (22% chose this)
  • Ch-13 (4% chose this)
  • Ch-16 (74% chose this)
Click here to add explanation
What is your vessel's obligation upon receipt of a Distress priority EGC message requesting that vessels report in response to a SAR situation?
  • Silence the alarm, notify the master and send a message to the RCC with your vessel's position and capabilities. (63% chose this)
  • Read the Distress EGC message and if the situation is too far away no response is required. (4% chose this)
  • Read the Distress EGC message and await instructions from the RCC as how to proceed to the distress. (8% chose this)
  • Silence the alarm, notify the Master and await instructions from the RCC as to whether your vessel is requisitioned or released from participation in SAR activity. (25% chose this)
Click here to add explanation
What is the MID?
  • Mobile Identification Number (21% chose this)
  • Marine Indemnity Directory (4% chose this)
  • Mobile Interference Digits (4% chose this)
  • Maritime Identification Digits (71% chose this)
Click here to add explanation
Which of the following numbers indicates a ship station MMSI?
  • 003372694 (4% chose this)
  • 030356328 (50% chose this)
  • 3384672 (13% chose this)
  • 623944326 (33% chose this)
Click here to add explanation
Which Inmarsat Earth Stations could a vessel utilize for Inmarsat-C traffic if operating off the Atlantic Coast of the United States and synched to the AOR-W satellite?
  • Southbury (USA), Burum (Netherlands), Eik (Norway). (52% chose this)
  • Santa Paula (USA), Aussaguel (France) or Eik (Norway). (17% chose this)
  • Southbury (USA), Santa Paula (USA) or Yamaguchi (Japan). (26% chose this)
  • Southbury, (USA), Nakhoda (Russia) or Beijing (PRC). (4% chose this)
Click here to add explanation
What maintenance function may the holder of a GMDSS Radio Operator license perform, or supervise the performance of, on an Inmarsat-C SES?
  • Painting the antenna dome. (4% chose this)
  • Adjust the station's EIRP. (13% chose this)
  • Adjust any front panel controls. (71% chose this)
  • Adjust a reference oscillator or synthesizer. (13% chose this)
Click here to add explanation
A vessel, before transiting the Panama Canal, on a voyage from San Diego to Miami, loses the ability to communicate via Inmarsat. The most likely cause is:
  • The vessel has sailed beyond the coverage area of the Pacific satellite. (84% chose this)
  • The vessel has sailed beyond the coverage area of the Southbury Shore Station. (4% chose this)
  • The vessel has sailed beyond the coverage area of the Western Atlantic satellite. (12% chose this)
  • The satellite orbit is beyond the usable range of the SES. (0% chose this)
Click here to add explanation
Which of the following satellite systems is of particular & dedicated importance to search and rescue missions under GMDSS?
  • COSPAS/SARSAT (85% chose this)
  • Inmarsat (8% chose this)
  • GPS (8% chose this)
  • Iridium (0% chose this)
Click here to add explanation
Which of the following statements concerning satellite EPIRBs is true?
  • The coded EPIRB signal identifies the nature of the Distress situation. (5% chose this)
  • The coded EPIRB signal only identifies the vessel's name and port of registry. (5% chose this)
  • If the GMDSS Radio Operator does not program the EPIRB, it will transmit default information such as the follow-on communications frequency and mode. (5% chose this)
  • Once activated, these EPIRBs transmit a signal for use in identifying the vessel and for determining the position of the beacon. (86% chose this)
Click here to add explanation
Which of the following frequencies have NOT been designated for GMDSS "On-scene" or SAR communications?
  • VHF Ch-16 (11% chose this)
  • MF radiotelephony on 2182.0 kHz (4% chose this)
  • SITOR (NBDP) on 2182.0 kHz (64% chose this)
  • HF radiotelephony on 4125.0 kHz (21% chose this)
Click here to add explanation
What is the equipment arrangement that provides the maximum availability for reception of MSI broadcasts when using Inmarsat-C for TELEX communications?
  • Separate EGC receiver. (61% chose this)
  • Integrating EGC receiver with the existing Inmarsat-C equipment. (17% chose this)
  • Redundancy using HF SSB to receive voice broadcasts. (17% chose this)
  • Automatic switching between Inmarsat-C and EGC functions. (6% chose this)
Click here to add explanation
What action should you take after sending a false or accidental Distress alert on Inmarsat-C?
  • Press the "Distress Hot Keys" then press the "cancel" key. (10% chose this)
  • Select "Transmit" or "SEND/REC" menu and send a cancellation message via the LES used for the Distress alert. (73% chose this)
  • Do nothing until the RCC contacts your vessel to determine if the Distress alert was genuine. (7% chose this)
  • Select the cancel false Distress alert option in the Distress Setup Menu and re-transmit the call. (10% chose this)
Click here to add explanation
Which of the following would indicate an Inmarsat-C terminal?
  • 003668202 (8% chose this)
  • 325468263 (12% chose this)
  • 436682433 (76% chose this)
  • 1500270 (4% chose this)
Click here to add explanation
What kind(s) of broadcasts are not available through SafetyNETTM?
  • MSI and messages to specific geographic areas. (13% chose this)
  • Storm warnings (3% chose this)
  • Distress and Urgency bulletins (10% chose this)
  • Vessel traffic lists (73% chose this)
Click here to add explanation
How may an Inmarsat-C unit be used to send text communications to an Internet destination?
  • Call up the file menu, insert the internet address in the first line of the file and use the SEND/REC or TRANSMIT menu to send the message. (11% chose this)
  • Use the SEND/REC or TRANSMIT menu, compose a text file and use the file attach function in the file menu. (11% chose this)
  • Internet addresses cannot be reached from an Inmarsat-C terminal without a separate e-mail computer. (0% chose this)
  • Compose a text file, use the SEND/REC or TRANSMIT menu & specify the recipient using the address book function (or by manual entry) for e-mail. (78% chose this)
Click here to add explanation
What is not an advantage of an AIS SART signal when compared to a radar-based SART signal?
  • The AIS SART can be detected much farther away than radar SART models. (71% chose this)
  • Not every AIS transmission needs to be received to achieve an accurate presentation of the location. (0% chose this)
  • The AIS SART position has GPS accuracy and transmits on AIS VHF frequencies. (21% chose this)
  • AIS SART units may be easier to find in poor radar target conditions. (8% chose this)
Click here to add explanation
Why is it important to limit the duration of testing a SART?
  • Excessive testing causes "burn in" on the vessel's radar display. (4% chose this)
  • Testing in port or even at sea may cause interference to other radars or a test signal may be misinterpreted as a genuine Distress situation. (96% chose this)
  • To prevent overheating, a SART requires sufficient ventilation that is significantly reduced when the SART is being tested. (0% chose this)
  • If another SART is testing at the same time, the two signals will cause damage to the unit that transmitted them. (0% chose this)
Click here to add explanation
How many frequencies are assigned specifically for HF MSI broadcasts?
  • 6 (22% chose this)
  • 8 (44% chose this)
  • 5 (15% chose this)
  • 7 (19% chose this)
Click here to add explanation
Which of the following is not correct with regard to Inmarsat-C e-mail?
  • It is possible to send e-mail messages from your ship's Inmarsat-C terminal to any e-mail address in the world. (12% chose this)
  • To receive e-mails from shore, your ship's e-mail address must be registered with an Inmarsat C Land Earth Station Service Provider. (4% chose this)
  • An additional hardware upgrade is required to enable your ship's Inmarsat-C terminal to send and receive e-mails. (76% chose this)
  • Not all land earth station service providers support e-mail service. (8% chose this)
Click here to add explanation
Which statement is true regarding Inmarsat "hot-key" Distress Alerts?
  • The LES programmed by the watch officers into the Distress Alert Update menu determines which RCC will receive your initial Distress Alert. (59% chose this)
  • The vessel's position is checked against the SAR jurisdictions and the proper LES updated as the vessel changes NAVAREAS. (9% chose this)
  • The GPS position updates the Distress Alert Update menu to the correct LES choice to ensure proper communications with an RCC. (14% chose this)
  • The Distress Alert defaults are set correctly by the manufacturer and then automatically updated. (18% chose this)
Click here to add explanation
Which of the following would indicate an F77 terminal?
  • A 9 digit number always starting with 76. (81% chose this)
  • A 12 digit number starting with the MID. (3% chose this)
  • A 9 digit number ending with the MID. (6% chose this)
  • A 9 digit number always starting with 4. (10% chose this)
Click here to add explanation
Which of the following conditions would be a symptom of malfunction in a 2182 kHz radiotelephone system which must be reported to the Master?
  • Much lower noise level observed during daytime operation. (0% chose this)
  • No indication of power output when speaking into the microphone. (81% chose this)
  • When testing a radiotelephone alarm on 2182 kHz into an artificial antenna, the Distress frequency watch receiver becomes unmuted, an improper testing procedure. (5% chose this)
  • Failure to contact a shore station 600 nautical miles distant during daytime operation. (14% chose this)
Click here to add explanation
What is an example of a locating signal?
  • SSB phone traffic (4% chose this)
  • Ship to shore transmissions (0% chose this)
  • Loran C (4% chose this)
  • A float-free EPIRB (92% chose this)
Click here to add explanation
Which satellite system promulgates Maritime Safety Information?
  • Inmarsat-C SafetyNETTM (73% chose this)
  • AMVER (4% chose this)
  • NAVTEX (19% chose this)
  • Inmarsat-M SES (4% chose this)
Click here to add explanation
Which statement regarding GMDSS MF/HF Transceiver frequency set-up is true:
  • Some consoles allow both manual keypad entry and ITU channel recall from a database or memory. (85% chose this)
  • Transmit and receive frequencies must always be manually entered from the keypad. (4% chose this)
  • Transmit and receive frequencies must always be recalled from a database or memory. (4% chose this)
  • Frequencies in the manufacturer's databases are always accurate and legal for use. (8% chose this)
Click here to add explanation
The U.S. Coast Guard communications station providing HF MSI (Maritime Safety Information) broadcast coverage for NAVAREA XII is:
  • NMA (Miami) (0% chose this)
  • NMF (Boston) (18% chose this)
  • NMO (Honolulu) (79% chose this)
  • NMR (San Juan) (4% chose this)
Click here to add explanation
Which longitude corresponds to the AOR-W satellite for Inmarsat-B/C communications?
  • 64E (9% chose this)
  • 178E (9% chose this)
  • 15.5W (14% chose this)
  • 54W (68% chose this)
Click here to add explanation
What immediate remedy can be used to correct shadowing of the satellite signal by a shipboard obstruction?
  • Relocate the mast or other obstruction. (10% chose this)
  • Raise the transmit power level. (5% chose this)
  • Change the ship's course. (80% chose this)
  • Increase the receiver gain. (5% chose this)
Click here to add explanation
Which action must be taken to ensure that incoming message traffic of all priority levels will be received through Inmarsat-C?
  • The GMDSS Radio Operator must log-in to the desired satellite (if the unit did not automatically do so.) (57% chose this)
  • No additional action is necessary after turning on the receiver and aiming the antenna at the desired satellite. (4% chose this)
  • The system needs only to be commissioned and turned on. (9% chose this)
  • The GMDSS Radio Operator must log-in to the desired satellite and receive the message reference number (MRN) from the LES. (30% chose this)
Click here to add explanation
How would a notification of arrival be sent as a text to a mobile phone number using an Inmarsat-C unit?
  • Mobile phone numbers cannot be reached by Inmarsat-C terminals because they lack voice capability. (13% chose this)
  • Use the Inmarsat-C voice handset to compose and transmit the text. (4% chose this)
  • Compose a text file, use the SEND/REC or TRANSMIT menu & specify the recipient using the address book function (or by manual entry) for SMS destinations. (83% chose this)
  • The mobile phone number is inserted as the first line of the text file and sent with the SEND/REC or TRANSMIT menu. (0% chose this)
Click here to add explanation
The SART is required to have sufficient battery capacity to operate in the stand-by mode for what period of time?
  • Three days (4% chose this)
  • Four days (70% chose this)
  • Eight hours (0% chose this)
  • Forty-eight hours (26% chose this)
Click here to add explanation
How can a SART's detection and effective range be maximized?
  • The SART should be held or mounted as high as possible and in a vertical position. (96% chose this)
  • The SART should be placed in water immediately so it will begin transmitting. (0% chose this)
  • Switch the SART into the "high" power position. (0% chose this)
  • If possible, the SART should be mounted horizontally so that its signal matches that of the searching radar signal. (4% chose this)
Click here to add explanation
What can be the visual observation of a condition whereby it may be possible to initiate a reliable Inmarsat TELEX transmission but a voice transmission may not be possible?
  • An indication on a meter or on the display terminal of high transmit power. (4% chose this)
  • An indication on a meter or on the terminal of low receiver signal strength. (83% chose this)
  • An indication of a very high antenna elevation on the display terminal screen. (8% chose this)
  • An indication that the antenna has reached its maximum travel in one direction. (4% chose this)
Click here to add explanation
For general communications purposes, simplex frequencies are:
  • Normally used with public coast stations for routine telephone communications. (20% chose this)
  • Normally used between ship stations as well as public coast stations simultaneously. (10% chose this)
  • Normally used with public coast stations for routine SITOR (NBDP) communications. (5% chose this)
  • Normally used between ship stations and private coast stations or for ship-ship communications. (65% chose this)
Click here to add explanation
What information is transmitted by a 406 MHz EPIRB alert?
  • Vessel position and nature of Distress. (0% chose this)
  • A unique Hexadecimal I.D. number. (97% chose this)
  • Vessel name and identification. (3% chose this)
  • Vessel MMSI number and position. (0% chose this)
Click here to add explanation
Which statement is false regarding an Inmarsat Distress request?
  • The NCS in each ocean region automatically monitors the processing of such calls by other LESs in that region and processes calls if any anomaly exists in the system. (27% chose this)
  • If all satellite channels are busy then one of them will be preempted by a Distress request. (14% chose this)
  • Any Distress request is automatically switched to an Inmarsat Distress working frequency. (41% chose this)
  • Any request message with Distress priority is automatically recognized by the LES and a satellite channel is instantly assigned. (18% chose this)
Click here to add explanation
Which of the following is normally part of 406 MHz satellite EPIRBs?
  • A strobe light, automatic float-free bracket, 1-watt 406-MHz alert beacon. (21% chose this)
  • A 5-watt 406-MHz alert beacon, Automatic Hydrostatic Release (ARM), strobe light. (36% chose this)
  • Automatic float-free bracket, 5-watt 121.5 MHz homing beacon, strobe light. (32% chose this)
  • Automatic Hydrostatic Release (ARM), 1-watt 121.5 MHz alerting beacon, strobe light. (11% chose this)
Click here to add explanation
Which of the following is a correctly formatted Inmarsat-C address book entry for sending TELEX communications to a vessel in the IOR?
  • 853446323868 (14% chose this)
  • 583446976519 (50% chose this)
  • 582446323868 (18% chose this)
  • 870446976519 (18% chose this)
Click here to add explanation
What is meant by the acronym "EOS" in a DSC message?
  • Error Of Sequence (8% chose this)
  • End Of Signals (4% chose this)
  • Equal Operating Signals (0% chose this)
  • End Of Sequence (88% chose this)
Click here to add explanation
Which of the following is the primary frequency that is used exclusively for NAVTEX broadcasts internationally?
  • 2187.5 kHz (12% chose this)
  • 518 kHz (77% chose this)
  • 4209.5 kHz (12% chose this)
  • VHF channel 16 when the vessel is sailing in Sea Area A1, and 2187.5 kHz when in Sea Area A2. (0% chose this)
Click here to add explanation
Which of the following are the MF/HF DSC Distress watch frequencies
  • 2177.5, 4210.0, 6314.0, 8416.5 12579.0, 16806.5 (0% chose this)
  • 2182.0, 4125.0, 6215.0, 8291.0, 12290.0, 16420.0 (26% chose this)
  • 2174.5, 4177.5, 6268.0, 8376.5, 12520.0, 16695.0 (7% chose this)
  • 2187.5, 4207.5, 6312.0, 8414.5, 12577.0, 16804.5 (67% chose this)
Click here to add explanation
Which of the following would indicate an F77 terminal?
  • 150036 (4% chose this)
  • 430364290 (0% chose this)
  • 1502460 (0% chose this)
  • 766832922 (96% chose this)
Click here to add explanation
What can be defined as the service that allows terrestrial information providers to send general information messages to pre-defined groups of subscribers?
  • SafetyNETTM (38% chose this)
  • FleetNETTM (50% chose this)
  • COSPAS-SARSAT (4% chose this)
  • InfoNET (8% chose this)
Click here to add explanation
Detailed Distress situation report message formats can best be found in?
  • IAMSAR manual Volume III. (29% chose this)
  • ITU list of RCC and Coast stations. (10% chose this)
  • AMVER chapter of NGA PUB 117. (5% chose this)
  • FCC Title 47, Part 80. (57% chose this)
Click here to add explanation
MF/HF Transceiver Power levels should be set:
  • To the highest possible level to ensure effective communications. (10% chose this)
  • To the lowest possible level at all times regardless of whether communications are effective. (0% chose this)
  • To the lowest level needed to achieve the necessary propagation radius and communications range. (90% chose this)
  • To the highest level possible so as to ensure other stations cannot "break-in" on the channel during use. (0% chose this)
Click here to add explanation
Which of the following is not an example of a failure to log-out properly?
  • Turning off the power prior to logging out with the NCS. (15% chose this)
  • A message on the screen or printer from the NCS. (63% chose this)
  • Sailing the vessel into a shadowing or local RF interference situation before logging out. (15% chose this)
  • Sailing out of the footprint of a satellite before logging out. (7% chose this)
Click here to add explanation
Which of the following statements concerning MMSI is true?
  • Coast station MMSI numbers have 9 digits starting with 4. (4% chose this)
  • All MMSI numbers are 9 digits and contain an MID. (89% chose this)
  • Ship station MMSI numbers can be 7 digits or 9 digits depending on the Inmarsat terminal. (4% chose this)
  • Group MMSI numbers must begin with 2 zeros. (4% chose this)
Click here to add explanation
Assuming sending a direct TELEX message to a shore-based office, which sequence of events best describes a complete ARQ TELEX exchange with a coast station?
  • Initiate call, observe phasing, wait for exchange of answer-backs (WRU-AAB), send message, send KKKK to terminate the TELEX link, receive MRN & time and charges. (5% chose this)
  • Initiate call, observe phasing, wait for exchange of answer-backs (WRU-AAB), send DIRTLX command with zero, TELEX country code, TELEX number, send message, send KKKK to terminate the TELEX link, receive MRN and time and charges. (81% chose this)
  • Initiate call, observe exchange of answer-backs (WRU-AAB), send message, send KKKK to terminate radio link, receive MRN & time and charges. (5% chose this)
  • Initiate call, observe phasing, exchange of answer-backs (WRU-AAB), send message, send KKKK to terminate radio link, receive MRN & time and charges. (10% chose this)
Click here to add explanation
NAVAREAs referred to in NAVTEX are the same as used in:
  • GMDSS sea areas (17% chose this)
  • Inmarsat SafetyNETTM (63% chose this)
  • International Vessel Traffic Service (3% chose this)
  • Inmarsat ocean regions (17% chose this)
Click here to add explanation
You receive a TELEX with the sender's I.D. of 436640927. What type of terminal sent this message to your vessel?
  • F77 Fleet (0% chose this)
  • Inmarsat-C (92% chose this)
  • Land TELEX terminal (8% chose this)
  • Inmarsat-M (0% chose this)
Click here to add explanation
When Inmarsat-B and Inmarsat-C terminals are compared:
  • Inmarsat-B units provide greater communications capabilities, with the benefits of greater size, weight, installation expense and initial cost. (20% chose this)
  • Inmarsat-C provides lesser communications capabilities, with the trade-offs of greater size, weight, installation expense and initial cost. (4% chose this)
  • Inmarsat-B units provide greater communications capabilities, with the trade-offs of greater size, weight, installation expense and initial cost. (48% chose this)
  • Inmarsat-C units are of smaller size, weight, installation expense and initial cost and provide greater communications capabilities due to modern technology. (28% chose this)
Click here to add explanation
A vessel is tracking the AOR-E satellite. To initiate an operator assisted ship-to-shore telephone contact to a shoreside party in the U.S.A., # 202-456-7890, through a European Earth Station, a valid Inmarsat operations/dialing sequence would be?
  • Select LES: 001# then dial 1112024567890 (5% chose this)
  • Select LES: 012# then dial 1112024567890# (30% chose this)
  • Select LES: 001# then dial 0012024567890# (35% chose this)
  • Select LES: 001+ then dial 202 4567890 (30% chose this)
Click here to add explanation
How may Inmarsat-C terminals be used for sending Urgency or Safety priority communications (such as synoptic weather reports)?
  • Urgency & Safety EGC messages can only be received by an Inmarsat-C terminal. (11% chose this)
  • Enter PAN PAN or SECURITE into the heading of the message file so the message will be routed by priority. (21% chose this)
  • Only Routine or Distress priority messages can be sent from an Inmarsat-C terminal. (5% chose this)
  • Use the appropriate special 2-digit codes selected from the address book or manually enter the correct code into the SEND/REC or TRANSMIT menu. (63% chose this)
Click here to add explanation
Which of the following best describes Inmarsat-C operation?
  • Is an analog-based system. (3% chose this)
  • Requires a stabilized directional antenna. (0% chose this)
  • Provides for voice, TELEX, high and low-speed data and compressed video communications. (7% chose this)
  • Is a digital store-and-forward system that also provides Enhanced Group Call, data reporting, polling and Distress alerting capabilities. (90% chose this)
Click here to add explanation
What is the effect of having five periods (e.g. .....) in the text of a TELEX transmission on an Inmarsat-B SES?
  • The transmission will automatically terminate after those characters are transmitted. (80% chose this)
  • Only the first period will be routed to the receiving party. (8% chose this)
  • Only the first two periods will be routed to the receiving party. (0% chose this)
  • This will automatically trigger the reversal of charges to the receiving party. (12% chose this)
Click here to add explanation
Which Inmarsat Earth stations would be available for Inmarsat-B traffic if the vessel is off the Atlantic Coast of the United States and tracking the AOR-E satellite?
  • Fucino (Italy), Thermopylae (Greece) or Haiphong (Vietnam). (4% chose this)
  • Santa Paula (USA), Beijing (PRC), Sentosa (Singapore). (11% chose this)
  • Southbury (USA), Burum (Netherlands), or EIK (Norway). (85% chose this)
  • Haiphong (Vietnam), Burum (Netherlands), or EIK (Norway). (0% chose this)
Click here to add explanation
A VHF frequency channel pair of TX 157.200 MHz and RX 161.800 MHz would most likely be:
  • A VTS frequency for VTS - Ship communications. (4% chose this)
  • A simplex Public Correspondence Coast Radio Station frequency. (8% chose this)
  • A simplex Private Coast Radio Station frequency. (8% chose this)
  • A duplex Public Correspondence Coast Radio Station frequency. (81% chose this)
Click here to add explanation
What actions should be taken to transmit a detailed satellite Distress message to a RCC handling your vessel's initial "hot-key" Distress Alert?
  • Compose a detailed Distress message, attach it to the Distress Alert Setup menu and re-transmit the "hot-key" Distress Alert. (26% chose this)
  • Call up and edit a pre-saved detailed Distress message, select the closest LES and press the "hot-key." (11% chose this)
  • Compose a detailed Distress message, use the Transmit or SEND/REC menu and send it to both the RCC and to your company emergency contact number. (32% chose this)
  • Call up and edit a pre-saved detailed Distress message, use the Transmit or SEND/REC menu, select Distress priority and choose the best LES for the situation. (32% chose this)
Click here to add explanation
A ship at anchor has been communicating with a shore station approximately 200 miles distant on a frequency in the 4 MHz band through mid-morning. Toward the late afternoon and evening, what effect should be noticed?
  • Communications should be maintained with slight improvement in the signal received from the shore station. (5% chose this)
  • Communications should gradually improve and peak at night and early morning. (64% chose this)
  • Communications should slowly deteriorate but may be continued throughout the night. (14% chose this)
  • Communications should gradually deteriorate and become impossible on this frequency by night. (18% chose this)
Click here to add explanation
Which of the following is utilized to transmit Enhanced Group Calls?
  • COSPAS satellite (4% chose this)
  • HF SITOR (NBDP) shore stations (8% chose this)
  • NAVTEX shore stations (8% chose this)
  • Inmarsat satellite (79% chose this)
Click here to add explanation
It is possible to transmit all of the following via Inmarsat-C from a vessel except?
  • TELEX (0% chose this)
  • Text for delivery by fax. (13% chose this)
  • Voice (70% chose this)
  • x.400 data services (17% chose this)
Click here to add explanation
What does the term FEC mean in SITOR (NBDP) communications?
  • Forward Error Correction (77% chose this)
  • Field Effect Correction (5% chose this)
  • Forward Error Check (14% chose this)
  • Forward Error Character (5% chose this)
Click here to add explanation
You are on a ship in the Pacific ocean. What keyboard entry would you make on an Inmarsat-B terminal to obtain a TELEX connection via Santa Paula to another ship that is 300 miles west of San Francisco?
  • 001# 00582430353680# (24% chose this)
  • 003+ 00582430353680+ (10% chose this)
  • 001+ 00582336657450+ (62% chose this)
  • 002+ 00582336850450+ (5% chose this)
Click here to add explanation
What is the best source of information to find changes or additions to the routine communications frequencies of a Commercial Radio Station?
  • GMDSS Master Plan of Shore-Based Facilities. (14% chose this)
  • ITU List of Coast Stations and Special Service Stations. (List IV) (45% chose this)
  • FCC Part 80, Subpart W Coast Radio Stations. (14% chose this)
  • ITU List of Ship Stations and Maritime Mobile Service Identities. (List V) (27% chose this)
Click here to add explanation
What would the number 1090 indicate?
  • A ship DSC MMSI number. (4% chose this)
  • A coast station SITOR (NBDP) SELCAL number. (50% chose this)
  • A coast station DSC MMSI number. (19% chose this)
  • A ship station SITOR (NBDP) SELCAL number. (27% chose this)
Click here to add explanation
Which of these would not be a bad outcome of an Urgency DSC call to all vessels specifying an alternate TELEX frequency & emission that cause your transceiver to automatically switch?
  • The DSC controller decoded the contents of the DSC call and the requested frequency is not on the DUS table/placard but is in the marine band frequencies in the J2B emission. (20% chose this)
  • The DSC controller decoded the contents of the DSC call and the requested frequency is on the DUS table/placard in the J3E emission. (25% chose this)
  • The DSC controller decoded the contents of the DSC call and the requested frequency is on the DUS table/placard in the J2B emission. (40% chose this)
  • The DSC controller decoded the contents of the DSC call and the requested frequency is not on the DUS table/placard, is not in the marine band or the other vessel requested a J3E emission. (15% chose this)
Click here to add explanation
Which action is the most appropriate action for a GMDSS radio Operator to take in a Distress situation where immediate help is needed, but the vessel is not sinking nor needs to be abandoned?
  • Transmit Distress calls by HF/MF/VHF DSC or Inmarsat. (85% chose this)
  • Switch off EPIRB and SART manually. (4% chose this)
  • Notify the RCC (Rescue Coordination Center) through VHF FM on channel 13. (4% chose this)
  • Transmit Distress calls by activating the radiotelegraph automatic alarm signal. (7% chose this)
Click here to add explanation
What statement is true regarding the control the operator can exercise over the NAVTEX receiver's operation?
  • The operator can set the unit to automatically reject any and all categories of messages if the ship desires to not receive them. (12% chose this)
  • Upon entering a coastal area for the first time, the operator enters code KK to indicate "ready to receive NAVTEX". (4% chose this)
  • To reduce the number of messages, the operator can select code 00 to indicate "not in coastal passage". (0% chose this)
  • The operator can set most units to reject all messages except navigation, meteorological warnings, and search and rescue messages. If the unit will reject such messages it may be unsafe to do so. (84% chose this)
Click here to add explanation
When engaging in voice communications via an Inmarsat-B of F77 terminal, what procedures are used?
  • CODECs are used to digitize the voice signal. (77% chose this)
  • Noise-blanking must be selected by the operator. (5% chose this)
  • The voice signal must be compressed to fit into the allowed bandwidth. (9% chose this)
  • The voice signal will be expanded at the receiving terminal. (9% chose this)
Click here to add explanation
Which information determines if a NAVTEX message is to be rejected?
  • The second letter (from A to Z) in the header indicating the type of message. (89% chose this)
  • Transmitter identity (numerals from 1 to 26 identifying transmitting station within the NAVAREA). (7% chose this)
  • The Answerback of the receiving station has not been entered in the NAVTEX receiver. (0% chose this)
  • Only messages having a serial number 00 are rejected. (4% chose this)
Click here to add explanation
Which statement is NOT true regarding the requirements of VHF Survival Craft Transceivers?
  • Operation on Ch-13 is mandatory. (85% chose this)
  • Effective radiated power should be a minimum of 0.25 Watts. (11% chose this)
  • Simplex (single frequency) voice communications only. (0% chose this)
  • Operation on Ch-16 is mandatory. (4% chose this)
Click here to add explanation
What menu function in Inmarsat-C terminals would typically be used to specify an Internet address destination?
  • The System Setup menu to store all required e-mail destinations. (9% chose this)
  • The Address book function (or manual entry) in the SEND/REC or TRANSMIT menu. (91% chose this)
  • The Data Report menu to initiate the SEND/REC or TRANSMIT process. (0% chose this)
  • The menus for File Operations are used for adding the Internet address to the file. (0% chose this)
Click here to add explanation
In using SafetyNETTM for the receipt of MSI (Maritime Safety Information):
  • Only unscheduled Urgency and Distress messages will be received if the Inmarsat-C SES is not logged in. (4% chose this)
  • Both scheduled MSI and unscheduled Urgency and Distress messages will be received if the Inmarsat-C SES is logged in. (20% chose this)
  • All of these answers are correct. (72% chose this)
  • The Inmarsat-C SES must have Enhanced Group Calling (EGC) capability to receive MSI. (4% chose this)
Click here to add explanation
Which Inmarsat Earth stations could a GMDSS Radio Operator select for routine Inmarsat-C traffic if the vessel is in the Sea of Japan and logged-in to the POR satellite?
  • Beijing (PRC), Santa Paula (USA), Auckland (New Zealand) or Sentosa (Singapore). (75% chose this)
  • Auckland (New Zealand), EIK (Norway), Sentosa (Singapore) or Beijing (PRC). (15% chose this)
  • Yamaguchi (Japan), Southbury (USA), Pune (India) or Haifa (Israel). (5% chose this)
  • Southbury (USA), Thermopylae (Greece), Psary (Poland) or Tangua (Brazil). (5% chose this)
Click here to add explanation
What may be used as a homing signal by the search and rescue vessels in the immediate vicinity of the ship in Distress?
  • Flare gun (0% chose this)
  • Strobe Light (17% chose this)
  • 406 MHz signal from a satellite EPIRB. (30% chose this)
  • A 121.5 MHz emergency transmitter in a satellite EPIRB. (53% chose this)
Click here to add explanation
Which of the following would indicate an F77 terminal?
  • 765044177 (91% chose this)
  • 003668202 (0% chose this)
  • 436682433 (9% chose this)
  • 1500270 (0% chose this)
Click here to add explanation
To receive all mandatory MSI using the SafetyNETTM system the vessel must:
  • Notify the NAVAREA coordinator you are using SafetyNETTM for the receipt of MSI (Maritime Safety Information). (9% chose this)
  • Log-in and ensure the position is accurate to receive MSI for the NAVAREA the vessel is currently within. (68% chose this)
  • Set the receiver to your destination Inmarsat Ocean Region. (14% chose this)
  • Notify the NAVAREA coordinator you are using SafetyNETTM for the receipt of MSI (Maritime Safety Information) and set the receiver to your destination Ocean Region. (9% chose this)
Click here to add explanation
Which of the following statements concerning Inmarsat geostationary satellites is true?
  • They are in a polar orbit, in order to provide true global coverage. (7% chose this)
  • They provide coverage to vessels in nearly all of the world's navigable waters. (85% chose this)
  • They are in an equatorial orbit, in order to provide true global coverage. (4% chose this)
  • Vessels sailing in equatorial waters are able to use only one satellite, whereas other vessels are able to choose between at least two satellites. (4% chose this)
Click here to add explanation
DSC relays of Distress alerts by vessels:
  • Should be done for all Distress alerts received aboard the ship. (0% chose this)
  • Should be transmitted to all ships involved in Distress traffic. (12% chose this)
  • Should be avoided; unless an acknowledgement has not been heard. (80% chose this)
  • Are the best means to provide for a retransmission of Distress communications. (8% chose this)
Click here to add explanation
When Inmarsat-B and Inmarsat-C terminals are compared:
  • Inmarsat-C antennas are smaller, with active parabolic antennas but no rewind capability. (26% chose this)
  • Inmarsat-C antennas are smaller, with passive non-parabolic antennas but no rewind capability. (42% chose this)
  • Inmarsat-B antennas are larger, with passive non-parabolic antennas that require rewind capability. (11% chose this)
  • Inmarsat-B antennas are larger, with stationary parabolic antennas but no rewind capability. (21% chose this)
Click here to add explanation
How are paired SITOR (NBDP) frequencies normally used?
  • These are normally used for ARQ communications with coast radio stations. (41% chose this)
  • These are normally used for FEC communications with coast radio stations. (41% chose this)
  • These are normally used only for Distress communications to limit channel interference. (9% chose this)
  • These are normally used for DSC communications with coast radio stations. (9% chose this)
Click here to add explanation
Which of these cannot happen when a paper model NAVTEX receiver runs out of paper?
  • The unit is unable to print messages and all subsequent MSI broadcasts may be missed until the paper is replaced. (18% chose this)
  • The system will automatically change from receiving MSI by NAVTEX to receiving it by SafetyNETTM so that no messages will be lost. (57% chose this)
  • It may give off either an audible and/or visual alarm. (14% chose this)
  • MSI messages may be missed because the unit cannot print them out. (11% chose this)
Click here to add explanation
The Radiotelephone Safety signal is:
  • "Safety Safety Safety" (5% chose this)
  • "Pan Pan" repeated 3 times (5% chose this)
  • "Securite Securite" repeated 3 times (10% chose this)
  • "Securite" repeated 3 times (81% chose this)
Click here to add explanation
With what other stations may portable survival craft transceivers not communicate?
  • Communication between the ship and survival craft transceivers ashore. (67% chose this)
  • Communication between the ship and its survival craft. (4% chose this)
  • Communication between rescue units and survival craft. (4% chose this)
  • Communication between multiple survival craft and with aircraft. (25% chose this)
Click here to add explanation
Which automatic TELEX command should be sent by a ship station during SITOR (NBDP) operations to properly address a weather report to the national weather authority?
  • WX+ followed by the text of the report. (6% chose this)
  • OBS+ then MSG+ to indicate weather report. (0% chose this)
  • OBS+ and then send the weather report. (63% chose this)
  • GA+? then OBS+ and then send the weather report. (31% chose this)
Click here to add explanation
How is a NAVTEX receiver programmed to reject certain messages?
  • The transmitting station's two-digit identification can be entered to de-select reception of its broadcasts. (7% chose this)
  • By choosing a message category's single letter (A-Z) identifier and then deselecting or deactivating. (90% chose this)
  • By entering the SELCAL of the NAVTEX transmitting station. (0% chose this)
  • By pressing "00" in the transmitter's ID block. (3% chose this)
Click here to add explanation
How many total frequencies are available for DSC Distress alerting?
  • One (15% chose this)
  • Two (15% chose this)
  • Five (8% chose this)
  • Seven (62% chose this)
Click here to add explanation
Which of the following is the call sign for a U.S.C.G. coast station?
  • NERK (10% chose this)
  • KPH (17% chose this)
  • WCC (0% chose this)
  • NMN (72% chose this)
Click here to add explanation
What actions should the GMDSS radio operator take prior to any potential Distress situation?
  • Create a table or chart of all the DSC coast stations that might be used during the vessel's itinerary. (0% chose this)
  • All of these answers are good operational practice and should be consistently done. (89% chose this)
  • Prepare a detailed Distress message file on both satellite & MF-HF SITOR (NBDP) equipment containing all information needed in a Distress so it will be available for last-minute editing. (7% chose this)
  • Ensure all LES choices are correct and then updated properly as the vessel transits different SAR jurisdictions. (4% chose this)
Click here to add explanation
Which of the following statements concerning COSPAS-SARSAT is false?
  • 406 MHz EPIRBs are units that are used as alerting devices. (11% chose this)
  • Doppler frequency measurements provide more precise locations than GPIRB signals. (67% chose this)
  • The Doppler frequency measurement concept is used to determine the EPIRB's location. (7% chose this)
  • Satellites in a low-earth polar orbit detect EPIRB beacons on 406 MHz and relay the information to a Local User Terminal (LUT). (15% chose this)
Click here to add explanation
Once ARQ communication with the coast radio station has been established, which of the following events will most likely take place?
  • The vessel then requests the coast radio station's SELCAL so that communication can be set up on the appropriate working channel. (13% chose this)
  • After exchanging answer-backs (WRU-AAB) with the vessel, the coast radio station transmits GA+?. (65% chose this)
  • Since communication has already shifted to the working channel, the vessel then transmits the subscriber number and text of the message to be sent for the coast radio station to store and forward. (13% chose this)
  • The coast radio station will transmit a menu of commands such as DIRTLX+, OBS+ or AMV+ so the ship can select the desired action. (9% chose this)
Click here to add explanation
Which of the following would indicate an Inmarsat-C terminal?
  • A 9 digit number beginning with the MID. (8% chose this)
  • A 9 digit number always starting with 4. (80% chose this)
  • A 7 digit number. (8% chose this)
  • A 9 digit number always starting with 3. (4% chose this)
Click here to add explanation
What sequence best describes an MF-HF DSC Distress menu transmission?
  • Vessel name, Distress priority code, vessel position & time, nature of Distress, (28% chose this)
  • A string of dots to stop the DSC scanner, vessel MMSI, vessel position & time, nature of Distress, frequency for follow-on communications. (40% chose this)
  • Vessel MMSI, frequency & emission for follow-on communications, vessel position & time, Distress priority code. (20% chose this)
  • A string of dots to stop the DSC scanner, Distress priority code, vessel position & time, emission for follow-on communications, DSC frequency. (12% chose this)
Click here to add explanation
Which channel is utilized for the required Bridge-to-Bridge watch?
  • VHF-FM on Ch-13 in most areas of the continental United States. (86% chose this)
  • DSC on Ch-70 (0% chose this)
  • VHF-FM on Ch-16 (7% chose this)
  • The vessel's VHF working frequency. (7% chose this)
Click here to add explanation
A valid MMSI number for a DSC call to a specific group of vessels is:
  • 003664523 (18% chose this)
  • 338462941 (18% chose this)
  • 003036483 (7% chose this)
  • 030327931 (57% chose this)
Click here to add explanation
Which of the following statements concerning MMSI is true?
  • All ship station MMSI must begin with a single zero and include the MID. (7% chose this)
  • All group station MMSI must begin with the MID. (17% chose this)
  • None of these answers are correct. (62% chose this)
  • All Coast Station MMSI must be 9 digits and begin with the MID and then two zeros. (14% chose this)
Click here to add explanation
Which of the following statements concerning DSC equipment is true?
  • The GMDSS Radio Operator is not responsible for properly selecting HF DSC guard channels because they are done automatically by the watch receiver. (4% chose this)
  • All equipment must be type accepted by Inmarsat. (15% chose this)
  • The vessel's navigational position must be updated, either automatically or manually, no less often than every four (4) hours. (63% chose this)
  • The GMDSS Radio Operator is responsible for properly selecting VHF & MF DSC guard channels but the HF frequencies are done automatically by the watch receiver. (19% chose this)
Click here to add explanation
What type of station would be assigned the call sign WAB2174?
  • Tug boat (85% chose this)
  • Container ship (5% chose this)
  • Passenger ship (5% chose this)
  • Bulk Tanker (5% chose this)
Click here to add explanation
What is a potential danger of using the manufacturer's database to set up for operations using MF-HF ITU frequency assignments?
  • All manufacturer's frequency databases are required to be standardized & accurate so that there is no danger. (23% chose this)
  • Using the manufacturer's frequency database to setup the transceiver typically takes longer and is more prone to error than a manual setup. (0% chose this)
  • Different manufacturers use different database numbering systems to incorporate the ITU assignments into the transceiver and therefore a potential for confusion exists. (73% chose this)
  • Using the manufacturer's frequency databases ensures that the transceiver is always restricted to the vessel's licensed frequencies so that there is no danger. (5% chose this)
Click here to add explanation
GMDSS operators should learn which of the following propagation "rules of thumb"?
  • Longer distance = lower frequency, Shorter distance = higher frequency; Daytime = higher frequency, nighttime = lower frequency. (28% chose this)
  • Longer distance = lower frequency, Shorter distance = lower frequency, Daytime = lower frequency, nighttime = higher frequency. (4% chose this)
  • Longer distance = higher frequency, Shorter distance = lower frequency, Daytime = higher frequency, nighttime = lower frequency. (68% chose this)
  • Longer distance = higher frequency, Shorter distance = higher frequency, Daytime = lower frequency, nighttime = higher frequency. (0% chose this)
Click here to add explanation
What action should a GMDSS Radio Operator take when SafetyNETTM Distress or Urgency messages are received by the vessel's EGC receiver?
  • Aural and/or visual alarms are activated and require manual deactivation. (52% chose this)
  • No immediate action is required, as an audible tone will be generated at the beginning and end of the transmission and a paper printout of the message will be generated. (39% chose this)
  • No immediate action is required by the operator, since the transmission will be automatically acknowledged by the receiving vessel. (9% chose this)
  • A periodic alarm tone will be heard until the radio operator prints the message from the unit's memory. (0% chose this)
Click here to add explanation
Which of the following MMSI numbers indicates a U.S. flag ship station?
  • 430326890 (15% chose this)
  • 033609991 (27% chose this)
  • 303236824 (58% chose this)
  • 257326819 (0% chose this)
Click here to add explanation
Which of the following would indicate an Inmarsat-B terminal?
  • 150036 (0% chose this)
  • 430363275 (14% chose this)
  • 1502460 (7% chose this)
  • 366632824 (79% chose this)
Click here to add explanation
Which of these would be vital to a GMDSS SAR situation in polar regions?
  • GOES satellites to receive Distress Alerts and HF Voice for follow-on and SAR activity. (4% chose this)
  • GOES satellites to receive Distress Alerts and Inmarsat Voice for follow-on and SAR activity. (12% chose this)
  • Inmarsat satellites to receive Distress Alerts and HF Voice for follow-on and SAR activity. (16% chose this)
  • COSPAS/SARSAT satellites to receive Distress Alerts and HF Voice for follow-on and SAR activity. (68% chose this)
Click here to add explanation
Which statement is NOT true regarding the COSPAS-SARSAT system?
  • EPIRBs are satellite beacons used as alerting/locating devices. (0% chose this)
  • May be used to transmit public correspondence. (83% chose this)
  • Locates Distress beacons transmitting on 406 MHz. (4% chose this)
  • Doppler shift is used to locate the beacons. (13% chose this)
Click here to add explanation
Which of the following watches must a compulsory Sea Area A1 vessel maintain?
  • A continuous DSC watch on Ch-70. (79% chose this)
  • A continuous DSC watch on 8414.5 kHz plus one other HF DSC frequency. (0% chose this)
  • A continuous DSC watch on 2187.5 kHz. (4% chose this)
  • A continuous DSC watch on Ch-16. (18% chose this)
Click here to add explanation
What is the fundamental purpose for imposing radio silence?
  • To ensure that interference to proprietary communications is minimized. (15% chose this)
  • To ensure that only voice communications can be effected on the Distress frequency or channel. (4% chose this)
  • To ensure that a Distressed vessel will have a "window" twice each hour for transmitting routine messages. (4% chose this)
  • To mitigate the risk of interference on a frequency or channel being used for emergency communications. (77% chose this)
Click here to add explanation
Which of the following conditions does not typically impair Inmarsat-B communications ?
  • An obstruction, such as a mast, blocking the signal between the satellite and the SES antenna when the vessel is steering a specific course. (14% chose this)
  • Normal precipitation from gales and storms. (81% chose this)
  • A satellite whose signal is on a low elevation, below the horizon. (5% chose this)
  • Travel beyond the effective radius of the satellite. (0% chose this)
Click here to add explanation
Which statement best defines the SITOR (NBDP) acronym "ARQ"?
  • Error Correction when 2 stations are in direct & phased telephone communications with each other. (16% chose this)
  • Error correction for one-way TELEX transmissions to a single other station. (16% chose this)
  • Error correction for one-way TELEX broadcasts of weather or navigation information. (8% chose this)
  • Error Correction with 2 stations are in direct & phased TELEX communications with each other. (60% chose this)
Click here to add explanation
What does the MID (Maritime Identification Digits) signify?
  • Port of registry (32% chose this)
  • Nationality (64% chose this)
  • Gross tonnage (0% chose this)
  • Passenger vessel (4% chose this)
Click here to add explanation
Which of the following actions should be taken once the vessel is berthed and will not leave port again for several weeks?
  • The GMDSS Radio Operator must notify the NCS that the vessel will be off-line, and wait for the NCS to acknowledge with a confirmation number that must be logged. (13% chose this)
  • The Inmarsat-C system can be powered down without taking additional steps once the GMDSS Radio Operator has ensured that all incoming SafetyNETTM messages have been received and stored. (7% chose this)
  • The GMDSS Radio Operator may log out of the Inmarsat-C system and turn the power off (unless the vessel decides to leave the unit on during the port stay.) (80% chose this)
  • The GMDSS Radio Operator must transmit an all-ships alert, to notify vessels within the satellite's footprint that the vessel will be off-line. (0% chose this)
Click here to add explanation
The USA-INT control on VHF units:
  • Selects duplex operations for U.S. coastal waters and simplex operations in non-U.S. waters, on the "alpha" channels. (17% chose this)
  • Ensures that the "alpha" channels are correctly set to duplex for use in U.S. waters & on VTS channels. (0% chose this)
  • Changes selected international duplex channels to simplex channels for use in U.S. waters, on the "alpha" channels. (83% chose this)
  • Changes selected international simplex channels to duplex channels for use in U.S. waters, on the "alpha" channels. (0% chose this)
Click here to add explanation
What is the transmitting range of most NAVTEX stations?
  • Typically 50-100 nautical miles (90-180 km) from shore. (0% chose this)
  • Typically upwards of 1000 nautical miles (1800 km) during the daytime. (12% chose this)
  • Typically 200-400 nautical miles (360-720 km). (88% chose this)
  • It is limited to line-of-sight or about 30 nautical miles (54 km). (0% chose this)
Click here to add explanation
Which of the following statements concerning EGC configuration is false?
  • NAVAREA selection should be monitored and appropriately updated. (10% chose this)
  • The originator of MSI information cannot specify receipt only by vessels within a specific geographical area, circular or rectangular. (60% chose this)
  • The originator of MSI information can specify receipt only by vessels within a specific geographical area, circular or rectangular. (5% chose this)
  • GMDSS operators generally can select additional NAVAREAS to acquire EGC messages of interest to the vessel. (25% chose this)
Click here to add explanation
Which Inmarsat Earth stations would be available for Inmarsat-C traffic if the vessel is off the Pacific Coast of the United States but logged-in to the AOR-W satellite?
  • EIK (Norway), Tangua (Brazil), Thermopylae (Greece) (0% chose this)
  • Southbury (USA), Burum (Netherlands), or EIK (Norway). (68% chose this)
  • Santa Paula (USA), Psary (Poland), Yamaguchi (Japan). (26% chose this)
  • Beijing (PRC), Fucino (Italy), Nudol (Russia). (5% chose this)
Click here to add explanation
What statement is true regarding tests and maintenance that could be provided for the SART?
  • Full verification within manufacturer's specifications by the on-board maintainer would be a requirement for all vessels in the A3 & A4 sea areas using measuring equipment to generate 9 GHz signals. (0% chose this)
  • Battery should be replaced within the 90 day grace period following the manufacturer's expiration date shown on the SART and the SART should only be tested at-sea to reduce interference to other vessels. (0% chose this)
  • Extreme care should be exercised because testing of the SART may be received by other vessels, may be interpreted as a Distress condition, or it may interfere with other vessels' safe navigation. (81% chose this)
  • Battery should be replaced with a new one before the manufacturer's expiration date shown on the SART and the SART should only be tested in port to reduce interference to other vessels. (19% chose this)
Click here to add explanation
Which of the following situations would normally use the Safety priority?
  • Treatment of a crewmember with a broken leg that is not life-threatening. (20% chose this)
  • Treatment of a crewmember with a serious cardiac emergency. (8% chose this)
  • A fire in the generator flat/spaces. (0% chose this)
  • Loss of 5 containers with lashing gear over the side. (72% chose this)
Click here to add explanation
Which of the following statements concerning SITOR (NBDP) communications is true?
  • FEC requests are first acknowledged by the vessel's transmitter before broadcasts can be received. (24% chose this)
  • FEC mode broadcasts can be passively received without the transmitter being active. (57% chose this)
  • Weather broadcasts are always made in ARQ mode to ensure reception. (10% chose this)
  • ARQ mode communications can be passively received without the transmitter being active. (10% chose this)
Click here to add explanation
If the Inmarsat-C terminal is inoperative but the vessel remains within NAVTEX coverage -- which of the following message categories should not be disabled by the GMDSS Radio Operator?
  • Navigational warnings, meteorological warnings and metrological forecasts. (0% chose this)
  • Meteorological warnings, Search and Rescue information and Navigational warnings. (71% chose this)
  • Search and Rescue information, navigational warnings and other electronic navaid messages. (29% chose this)
  • Search and Rescue information, Meteorological warnings and ice reports. (0% chose this)
Click here to add explanation
Which of the following is a correctly formatted Inmarsat-C address book entry for sending communications to a shoreside TELEX terminal number 440122 in the United Kingdom (TELEX country code 51)?
  • 51440122+ (20% chose this)
  • (51)440122 (0% chose this)
  • 51440122 (75% chose this)
  • 51440122# (5% chose this)
Click here to add explanation
Which satellite(s) would most likely be selected for use when the vessel is operating off the eastern shore of the United States?
  • IOR (4% chose this)
  • AOR-W (87% chose this)
  • POR (0% chose this)
  • Either AOR-W or IOR will work. (9% chose this)
Click here to add explanation
What sequence of ARQ codes matches the following: request establishment of a landline, end radio link after traffic is done, request connection for AMVER messages?
  • NNNN, KKKK, AMV+ (17% chose this)
  • KKKK, BRK+, AMV+ (4% chose this)
  • BRK+, DIRTLX+, AMV+ (8% chose this)
  • DIRTLX, BRK+, AMV+ (71% chose this)
Click here to add explanation
When sending a DSC call:
  • Vessel's position will automatically be sent with DSC calls specifying an alternate frequency. (12% chose this)
  • Vessel's position will automatically be sent if the vessel is sending a "Distress Hot Key" alert. (68% chose this)
  • Vessel's MMSI will indicate its ocean region and vessel position. (0% chose this)
  • Vessel's MMSI and position will automatically be sent for all types of DSC calls. (20% chose this)
Click here to add explanation
What would be the most appropriate HF bands for communicating from San Francisco to Taiwan or the Philippines?
  • 12 MHz during daylight at each end and 2 MHz when dark at each end. (11% chose this)
  • 8 MHz during daylight hours and 16 MHz during darkness. (6% chose this)
  • 6 MHz during daylight hours and 8 MHz during darkness. (17% chose this)
  • 16 or 22 MHz when daylight at each end and 8 MHz when dark at each end. (67% chose this)
Click here to add explanation
How many MF frequencies are available for DSC Distress related calls?
  • Five (38% chose this)
  • Four (21% chose this)
  • Two (17% chose this)
  • One (25% chose this)
Click here to add explanation
Which of the following best describes a shipboard Inmarsat-C system?
  • A small, lightweight terminal capable of providing satellite store-and-forward message communications. (79% chose this)
  • A satellite communications system that provides real-time connectivity. (0% chose this)
  • A small, lightweight terminal used to transmit messages over high frequency (HF) bands to communicate through a satellite. (0% chose this)
  • A satellite communications system that also provides continuous Digital Selective Calling coverage for all ocean regions. (21% chose this)
Click here to add explanation
How many HF DSC Distress watch channels must be guarded by a compulsory vessel underway.
  • 2 (55% chose this)
  • 3 (3% chose this)
  • 4 (7% chose this)
  • 6 (34% chose this)
Click here to add explanation
A ship has been communicating effectively on 16 MHz during daylight hours with a shore station at a distance of 3500 miles. Toward late afternoon and evening what effect would be noticed?
  • Communications should gradually deteriorate and become impossible on this frequency at night. (61% chose this)
  • Communications should be maintained with slight improvement in the signal received from the shore station. (13% chose this)
  • The gray line effect will prevent communications after dark. (0% chose this)
  • Communications should improve and peak at night. (26% chose this)
Click here to add explanation
Aboard ship, SafetyNETTM messages can be received by which equipment/methods?
  • VHF DSC on the weather channels. (0% chose this)
  • NAVTEX Receiver on 518 kHz or the Tropical Navtex frequency. (14% chose this)
  • EGC receiver of the vessel's Inmarsat-C SES. (50% chose this)
  • HF SITOR (NBDP) MSI frequencies. (36% chose this)
Click here to add explanation
What is meant by the characters GA+ on an Inmarsat terminal?
  • Go ahead for store & forward telex operations. (44% chose this)
  • The instruction to "give address". (4% chose this)
  • Go ahead for live telex operations. (44% chose this)
  • General Address (to all stations). (8% chose this)
Click here to add explanation
You receive a TELEX with the sender's I.D. of 433863491. What type of terminal sent this message to your vessel?
  • Inmarsat-C (84% chose this)
  • Land TELEX terminal (4% chose this)
  • Inmarsat-B (12% chose this)
  • Inmarsat-M (0% chose this)
Click here to add explanation
What statement is true regarding LES codes and Inmarsat "hot-key" alert default menus?
  • Automatic or manual updating of the LES code only needs to be done when switching to a different ocean region satellite. (9% chose this)
  • The SAR jurisdiction software automatically updates the "hot-key" menu based on the vessel's position. (18% chose this)
  • The LES code is determined by the NAVAREA based on the vessel's current position. (23% chose this)
  • The LES code must be updated by the officers depending upon the SAR jurisdictions the vessel transits and current ocean region satellite in use. (50% chose this)
Click here to add explanation
Which of the following best describes the full range of services provided by the Inmarsat-C Satellite system?
  • Polling, enhanced group call, and one-way position and data reporting via satellite. (0% chose this)
  • FM voice communications via satellite. (0% chose this)
  • Two-way messaging and data communications on a store-and-forward basis. (35% chose this)
  • Polling, enhanced group call, one-way position and data reporting via satellite, two-way messaging and data communications on a store-and-forward basis. (65% chose this)
Click here to add explanation
Which NAVAREA is associated with the western North Atlantic and the Caribbean Sea?
  • NAVAREA X (0% chose this)
  • NAVAREA XI (0% chose this)
  • NAVAREA XII (17% chose this)
  • NAVAREA IV (83% chose this)
Click here to add explanation
From an Inmarsat-C terminal, which of the following are correctly formatted address for sending TELEX messages to two vessels in the AOR-W? First to an Inmarsat-B and second to an Inmarsat-C.
  • 870366719020 first and 870436671929 second. (27% chose this)
  • 584436671929 first and 584366719020 second. (9% chose this)
  • 584366719020 first and 584436671929 second. (59% chose this)
  • 58136671920 first and 58136671929 second. (5% chose this)
Click here to add explanation
How is a signal radiated from an Inmarsat-B or F77 system's antenna?
  • It is usually radiated in an omni-directional pattern, but an optional feature allows it to be directional for use when the vessel is on the fringe of the satellite's footprint. (13% chose this)
  • It is a highly focused directional signal that must be beamed at the desired satellite. (54% chose this)
  • It is radiated in an omni-directional pattern. (33% chose this)
  • It is radiated in an omni-directional pattern that can be reversed by the Operator to attain directional beaming to an alternate satellite. (0% chose this)
Click here to add explanation
Which of the following is true of SITOR (NBDP) ARQ mode?
  • This is an interactive mode. (38% chose this)
  • Each character is repeated three times. (24% chose this)
  • Each character is transmitted twice. (29% chose this)
  • This mode is generally used to broadcast messages. (10% chose this)
Click here to add explanation
How is a signal radiated from an Inmarsat-C system's antenna?
  • It is a highly focused directional signal that must be beamed at the desired satellite. (26% chose this)
  • It is usually radiated in an omni-directional pattern, but an optional feature allows it to be directional for use when the vessel is on the fringe of the satellite's footprint. (0% chose this)
  • It is radiated in an omni-directional pattern. (70% chose this)
  • It is radiated in an omni-directional pattern that can be reversed by the Operator to attain directional beaming to an alternate satellite. (4% chose this)
Click here to add explanation
What is the primary purpose of an Inmarsat LES?
  • The LES is required for ship-ship Inmarsat communications, ship-shore communications are handled by terrestrial Coast Radio Stations. (11% chose this)
  • The LES monitors all operations of the satellite and assigns channels and frequencies to the vessel. (21% chose this)
  • The LES makes the satellite connection between the vessel and the requested destination for all types of services. (63% chose this)
  • The LES is dedicated only to processing all vessel Distress priority calls. (5% chose this)
Click here to add explanation
Of the following, which is true of SITOR (NBDP) ARQ mode?
  • The acceptance code consists of three characters. (10% chose this)
  • A continuous data stream is transmitted. (5% chose this)
  • Forward error correction reduces the number of errors. (10% chose this)
  • Each data block consists of three characters. (75% chose this)
Click here to add explanation
"On-scene" communications would best be represented by?
  • Using Inmarsat-C "hot-key" function (5% chose this)
  • Sending DSC alert on VHF Ch-70 (27% chose this)
  • SITOR (NBDP) on 2174.5 kHz (55% chose this)
  • SITOR (NBDP) on 4125.0 kHz (14% chose this)
Click here to add explanation
What action should you take after sending a false Distress alert on VHF?
  • Make a voice announcement to cancel the alert on Ch-16. (84% chose this)
  • Send a DSC cancellation message on Ch-70. (16% chose this)
  • Make a voice announcement to cancel the alert on Ch-13. (0% chose this)
  • Make a voice announcement to cancel the alert on Ch-22A. (0% chose this)
Click here to add explanation
The effectiveness of VHF communications is maximized by:
  • The adjustment of squelch for maximum receiver sensitivity, setting transmitter power to 1W & selecting an appropriate channel. (0% chose this)
  • Appropriate setting of the transmitter power, selecting an appropriate channel & adjustment of squelch for maximum receiver sensitivity. (64% chose this)
  • Selecting an appropriate channel, adjustment of squelch for minimum receiver sensitivity & setting transmitter power to 1W. (16% chose this)
  • Selecting an appropriate channel, adjustment of squelch for minimum receiver sensitivity, setting transmitter power to 25W. (20% chose this)
Click here to add explanation
Which statement is false regarding the COSPAS-SARSAT system and EPIRB operations?
  • The EPIRB's position is calculated by the system and passed to the MCC. (17% chose this)
  • The EPIRB transmits a unique Hex I.D. and vessel position that may be passed to the RCC. (13% chose this)
  • The EPIRB's position and Hex I.D. is passed instantaneously to the RCC. (57% chose this)
  • The EPIRB transmits a unique Hex I.D. that is passed to the RCC if it cannot be determined to be inadvertent by the MCC. (13% chose this)
Click here to add explanation
At mid-day, what would be the best choice in attempting to communicate with a shore station 15 miles distant?
  • 16 MHz band (0% chose this)
  • 156-164 MHz band (88% chose this)
  • 12 MHz band (13% chose this)
  • 22 MHz band (0% chose this)
Click here to add explanation
Which longitude corresponds to the AOR-E satellite for Inmarsat-B/C communications?
  • 15.5W (40% chose this)
  • 64E (5% chose this)
  • 178E (20% chose this)
  • 54W (35% chose this)
Click here to add explanation