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2022 Element 7 pool
217 / 600 questions need explanations
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To correctly address a SITOR (NBDP) message and transmit it "live" to a shore-based office the GMDSS operator would dial which sequence:
  • DIRTLX0051440344+ (47% chose this)
  • DIRTLX051440344+ (19% chose this)
  • DIRTLX581440344+ (16% chose this)
  • DIRTLX05811500260+ (19% chose this)
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Which of the following is a correct dialing sequence for a F77 vessel tracking the AOR-W satellite to make a voice call to an Iridium terminal via Yamaguchi (Japan)?
  • 001# 00881623456789# (20% chose this)
  • 003# 00881623456789# (24% chose this)
  • 003# 11870767588992# (32% chose this)
  • 001# 00870987654321# (24% chose this)
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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. (19% 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. (27% 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. (23% 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. (31% chose this)
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What entry would you make on an Iridium terminal to make a telephone call to another Iridium terminal?
  • 00870765439082 (40% chose this)
  • 00230882419# (4% chose this)
  • 00881648769345 (24% chose this)
  • 8821675902419 (32% chose this)
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A DSC Distress alert 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. (21% 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. (41% 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. (7% 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. (31% chose this)
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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. (10% chose this)
  • POB, vessel description, all vessel I.D. numbers, shore contact numbers, vessel position. (15% chose this)
  • Name/Call sign of vessel, POB, vessel description, all vessel I.D. numbers and shore contact numbers. (30% chose this)
  • Name/Call sign of vessel, nature of Distress, POB, vessel description and all vessel I.D. numbers. (45% chose this)
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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. (20% chose this)
  • The NCS will send a Distress Alert Setup incorrect LES code alarm so the alert can be corrected and re- transmitted. (32% chose this)
  • The NCS will step in and route the Distress Alert transmission to an RCC. (28% chose this)
  • If the LES code is incorrect then the Distress Alert transmission is not detected by any RCC. (20% chose this)
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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. (57% chose this)
  • Upon entering a new NAVTEX station's broadcast range, the GMDSS Radio Operator enters the station's SELCAL number. (11% 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. (29% chose this)
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A vessel is tracking the AOR-E satellite. To initiate an operator assisted F77 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 (14% chose this)
  • Select LES: 012# then dial 1112024567890# (28% chose this)
  • Select LES: 001# then dial 0012024567890# (31% chose this)
  • Select LES: 001+ then dial 202 4567890 (28% chose this)
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Which of the following is a correctly formatted Inmarsat-C address book entry for sending TELEX communications to a vessel in the IOR?
  • 853446323865 (4% chose this)
  • 583446976519 (29% chose this)
  • 582446323862 (25% chose this)
  • 870446976519 (43% chose this)
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Which of the following is true of SITOR (NBDP) ARQ mode?
  • This is an interactive mode. (29% chose this)
  • Each character is repeated three times. (13% chose this)
  • Each character is transmitted twice. (23% chose this)
  • This mode is generally used to broadcast messages. (35% chose this)
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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. (47% chose this)
  • Select Routine priority, enter own vessel's MMSI, specify legal alternate frequency, J3E emission and transmit the properly formatted DSC call. (20% chose this)
  • None of these answers is correct. (30% chose this)
  • Select Urgency priority, enter other vessel's MMSI, specify legal alternate frequency, F1B emission and transmit the properly formatted DSC call. (3% chose this)
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Which statement about Inmarsat-C LESs is true?
  • LESs are only available in the Ocean Regions that overlap one another. (3% chose this)
  • LESs are only available in the Ocean Region controlled by their NCS. (34% chose this)
  • Some LESs are available in all four footprints due to the cloud-based NGC mode. (31% chose this)
  • All LESs are available in all four footprints due to the cloud-based NGC mode. (31% chose this)
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When Inmarsat-FBB and Inmarsat-C terminals are compared:
  • Inmarsat-C antennas are smaller, with active parabolic antennas but no rewind capability. (36% chose this)
  • Inmarsat-C antennas are smaller, with passive non-parabolic antennas but no rewind capability. (32% chose this)
  • Inmarsat-FBB antennas are larger, with passive non-parabolic antennas that require rewind capability. (21% chose this)
  • Inmarsat-FBB antennas are larger, with stationary parabolic antennas but no rewind capability. (11% chose this)
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Which statement concerning Inmarsat-FBB and Inmarsat-C terminals is correct?
  • Both Inmarsat-FBB and Inmarsat-C units are capable of fax and voice communications. (0% chose this)
  • Inmarsat-FBB units are not capable of data communications, but Inmarsat-C units are capable of data communications. (18% chose this)
  • Both Inmarsat-FBB and Inmarsat-C units can send data as well as send messages to fax machines. (32% chose this)
  • None of these answers is correct. (50% chose this)
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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+ (30% chose this)
  • OBS+, WRU then Here is, BRK+ (13% chose this)
  • OBS+, GA+?, KKKK (40% chose this)
  • AMV+, +?, KKKK (17% chose this)
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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. (24% chose this)
  • Transceiver setup, wait for exchange of answer-backs (WRU-AAB), OPR+, operator entry of the appropriate automatic TELEX code. (7% 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. (31% chose this)
  • Transceiver setup, wait for exchange of answer-backs (WRU-AAB), GA+? and then send message text. (38% chose this)
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The purpose of "parity" in SITOR (NBDP) communications is?
  • Error correction in HF BFEC MSI broadcasts, SFEC NAVTEX broadcasts and two-way ARQ exchanges. (14% chose this)
  • Error correction in SFEC NAVTEX broadcasts, HF SFEC MSI broadcasts and two-way ARQ exchanges. (29% chose this)
  • Error correction in BFEC NAVTEX broadcasts, HF BFEC MSI broadcasts and one-way ARQ broadcasts. (21% chose this)
  • Error correction in HF BFEC MSI broadcasts, NAVTEX broadcasts and two-way ARQ exchanges. (36% chose this)
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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". (56% chose this)
  • Contact the nearest U.S.C.G. station to add the desired ship's call sign to the station's traffic list. (4% chose this)
  • Request the VTS operator place the call on channel 22A. (4% 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". (37% chose this)
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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. (28% chose this)
  • If the error percentage of repeat requests becomes too high. (17% chose this)
  • If the operator enters "KKKK" at the end of the message. (34% chose this)
  • If the BRK+? Command is transmitted after time and charges are received. (21% chose this)
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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/snowstorms. (12% chose this)
  • Local RF interference by in-port cell phone or other radio systems. (38% chose this)
  • Shadowing caused by an obstacle, such as a mast, between the SES antenna and the satellite. (38% chose this)
  • The vessel is on the fringe of the coverage area of the satellite. (12% chose this)
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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 wait for MSG+ to dial 023419645+. (7% chose this)
  • DIRTLX23122445+. (11% chose this)
  • DIRTLX followed by GA+? and the TELEX number. (44% chose this)
  • DIRTLX023424998+. (37% chose this)
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A vessel with an 18-hour ETA to the Panama Canal on a voyage from Miami loses the ability to communicate via Inmarsat-C. The most likely cause is?
  • The vessel has sailed beyond the coverage area of the Southbury Land Earth Station. (10% chose this)
  • The vessel has sailed beyond the coverage area of the Eastern Atlantic satellite. (16% chose this)
  • The vessel has sailed beyond the coverage area of the Western Atlantic satellite. (42% chose this)
  • An equipment fault resulting in a loss of signal from the satellite. (32% chose this)
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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. (38% chose this)
  • Select one of the 6 HF MSI frequencies and set-up the transceiver in ARQ TELEX mode. (15% chose this)
  • Select one of the 6 MF MSI frequencies and set-up the transceiver in FEC TELEX mode. (19% chose this)
  • Select the MF MSI frequency dedicated to tropical MSI and set-up the transceiver in FEC TELEX mode. (27% chose this)
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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. (23% chose this)
  • OBS+ then MSG+ to indicate weather report. (15% chose this)
  • OBS+ and then send the weather report. (42% chose this)
  • GA+? then OBS+ and then send the weather report. (19% chose this)
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How are Iridium calls routed through the satellite system?
  • The satellites store the calls and forwards them to ground stations when they are in view. (11% chose this)
  • The satellites are in view of one another and traffic can swiftly be passed to a ground station. (41% chose this)
  • The satellites are geo-stationary and route the traffic immediately to the ground stations. (19% chose this)
  • The satellites in polar orbits pass traffic to geo-stationary satellites and then to ground stations. (30% chose this)
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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 (17% chose this)
  • GA+?, DIRTLX, BRK+ (31% chose this)
  • GA+?, DIRTLX, KKKK (49% chose this)
  • WRU-AAB, DIRTLX, ..... (3% chose this)
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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. (11% chose this)
  • Some units transmit in ascending order of propagation radius to alert nearby ships or shore stations first. (32% chose this)
  • May be transmitted in any order programmed by the GMDSSS operator. (39% chose this)
  • Multi-frequency alerts work quite differently, depending on the manufacturer and require care and understanding of the feature. (18% chose this)
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How are high seas (HF) radiotelephone communications initially established between a vessel and a public correspondence station?
  • The vessel listens for "free signals" and calls the public correspondence station on the SITOR (NBDP) calling channel with the strongest marker signal. (58% chose this)
  • The vessel calls and establishes voice contact with the public correspondence station on a channel that the station is known to monitor, and the two stations then proceed with their business. (35% chose this)
  • The vessel calls the public correspondence station on VHF Channel 16, and the two stations then switch to the working channel. (3% chose this)
  • Public Correspondence Stations operate SITOR (NBDP) only. (3% chose this)
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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. (13% chose this)
  • It permits control of transceiver operations in response to an incoming DSC call. (26% chose this)
  • It provides for the formatting and transmission of outgoing DSC calls. (13% chose this)
  • It provides the scanning watch receiver capability on the 6 MF/HF DSC frequencies. (48% chose this)
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Which statement best defines the SITOR (NBDP) acronym "BFEC"?
  • Error correction for one-way TELEX broadcasts of weather or navigation information. (33% chose this)
  • Error Correction when 2 stations are in direct & phased telephone communications with each other. (18% chose this)
  • Error Correction when 2 stations are in direct & phased TELEX communications with each other. (30% chose this)
  • Error correction when 1 station sends a one-way TELEX to a single other station. (18% chose this)
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What sequence of ARQ codes matches the following: manual over, end of message text, end of connection to land destination terminal?
  • NNNN, KKKK, GA+ (16% chose this)
  • KKKK, DIRTLX, NNNN (29% chose this)
  • +?, NNNN, KKKK (35% chose this)
  • +?, . . . . ., BRK+ (19% chose this)
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Which of the following statements concerning SITOR (NBDP) communications is true?
  • FEC transmissions are made in data groups consisting of three-character blocks. (31% chose this)
  • FEC transmissions require a "phasing" or "handshaking" process prior to character transmission. (14% chose this)
  • FEC transmissions rely upon an error correction technique, which transmits each character twice. (38% chose this)
  • FEC transmissions rely upon parity and "repeat requests" to ensure error correction. (17% chose this)
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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# (15% chose this)
  • 15162294339 (41% chose this)
  • 015162294339 (44% chose this)
  • 1 516-229-4339 (0% chose this)
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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. (17% chose this)
  • ITU List of Coast Stations and Special Service Stations. (List IV) (50% chose this)
  • FCC Part 80, Subpart W Coast Radio Stations. (8% chose this)
  • ITU List of Ship Stations and Maritime Mobile Service Identities. (List V) (25% chose this)
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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. (40% chose this)
  • Listen to each station's voice announcement and determine which channel(s) will be monitored. (20% chose this)
  • Listen to each station's MSI broadcast to determine which public correspondence station to contact. (23% chose this)
  • Listen to the U.S. Coast Guard's traffic list to determine which Coast Guard station will handle commercial traffic. (17% chose this)
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Which mode of communications is NOT possible through an Inmarsat-C SES?
  • Shore-to-ship Facsimile (43% chose this)
  • Data (21% chose this)
  • TELEX (29% chose this)
  • Emergency Activation (7% chose this)
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When requesting a direct TELEX connection to a shore-based TELEX terminal the GMDSS operator must:
  • DIRTLX, 0, Country code, TELEX number, +. (44% chose this)
  • DIRTLX, 00, Ocean Area Code, TELEX number, +. (11% chose this)
  • DIRTLX, 0, Ocean Area, TELEX number, +. (4% chose this)
  • DIRTLX, 00, Country code, TELEX number. (41% chose this)
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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. (10% chose this)
  • If the operator enters "BRK+". (24% chose this)
  • If the automatic exchange of answerbacks is interrupted by keyboard entries. (24% chose this)
  • If the operator enters "NNNN" at the end of the message. (41% chose this)
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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. (48% 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. (36% 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. (6% chose this)
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Which Inmarsat Earth Stations could a vessel utilize for Inmarsat-C traffic if operating on a voyage from Diego Garcia to the Persian Gulf and synched to the IOR satellite?
  • Southbury (USA), Burum (Netherlands), Eik (Norway). (36% chose this)
  • Santa Paula (USA), Fucino (Italy) or Eik (Norway). (33% chose this)
  • Southbury (USA), Santa Paula (USA) or Fucino (Italy). (21% chose this)
  • Southbury, (USA), Fucino (Italy) or Beijing (P.R.C.). (9% chose this)
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"SITOR (NBDP)" communications are based on a digital code system:
  • Consisting of 7 bits, with four zeros and three ones. (41% chose this)
  • Consisting of 7 bits, with four ones and three zeroes. (28% chose this)
  • Consisting of 5 bits TELEX and 8 bits Fax. (10% chose this)
  • Consisting of 5 bits for ship stations and 7 bits for shore stations. (21% chose this)
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Inmarsat FBB coverage is provided by?
  • 66 satellites in near-polar orbits. (21% chose this)
  • The same four satellites that provide Inmarsat-C coverage. (25% chose this)
  • There are four footprints not all of which are identical to Inmarsat-C coverage. (43% chose this)
  • 6 geo-stationary satellites to provide coverage in all navigable waters. (11% chose this)
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Which statement is correct regarding HF SITOR (NBDP) under GMDSS?
  • Distress communications other than directly to the Coast Guard or other coast stations on the channels that they normally guard, should be in the broadcast SSB mode. (9% chose this)
  • Safety communications by direct-printing telegraphy should be in the ARQ mode when communicating with the U.S. Coast Guard or other coast stations on channels that they normally guard. (35% chose this)
  • The ARQ mode may not be used subsequently to the FEC mode even when it is advantageous to do so. (18% chose this)
  • Distress communications other than directly to the Coast Guard or other coast stations on the channels that they normally guard, should be in the broadcast FEC or SSB mode. (38% chose this)
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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. (4% chose this)
  • All of these answers are true. (52% 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. (44% chose this)
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Which longitude corresponds to the AOR-W satellite for Inmarsat-C communications?
  • 25.0 E (4% chose this)
  • 143.5 E (16% chose this)
  • 54.0 W (32% chose this)
  • 98.0 W (48% chose this)
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To request medical assistance from Inmarsat via voice what would be the correct procedure?
  • Enter 36# and then the phone number for the Inmarsat medical advisory system. (24% chose this)
  • Enter 32# and then the phone number for the Inmarsat medical advisory system. (24% chose this)
  • Enter 32# to request the Inmarsat medical advisory system. (48% chose this)
  • Enter 32+ to request the Inmarsat medical advisory system. (4% chose this)
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How is a signal radiated from an Inmarsat-FBB 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. (18% chose this)
  • It is a highly focused directional signal that must be beamed at the desired satellite. (43% chose this)
  • It is radiated in an omni-directional pattern. (36% 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)
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Iridium satellites are in what sort of orbits?
  • 4 satellites in near polar orbit to provide true global coverage. (11% chose this)
  • 66 satellites in geo-stationary orbit to provide true global coverage. (26% chose this)
  • 66 satellites in near polar orbit to provide true global coverage. (48% chose this)
  • 6 geo-stationary satellites providing coverage between 70N & 70S degrees latitude. (15% chose this)
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An incoming Distress priority 16 MHz DSC call requesting J3E emission might automatically switch to what frequency?
  • 16420.0 MHz (25% chose this)
  • 16696.5 kHz (4% chose this)
  • 16420.0 kHz (46% chose this)
  • 16804.5 kHz (25% chose this)
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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. (48% chose this)
  • Gel cell batteries are lead acid with a solid electrolyte; each cell is checked with a voltmeter. (26% chose this)
  • Gel cell batteries are NICAD with a solid electrolyte; each cell is checked with a voltmeter. (7% chose this)
  • Gel cell batteries are have special liquid electrolytes; they are charged with the NICAD charging rates and voltages. (19% chose this)
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The DIRTLX command should be given to a coast station at what point in time?
  • Immediately following the automatic exchange of answerbacks. (22% chose this)
  • After receipt of the Go Ahead indication following the automatic exchange of answerbacks. (48% chose this)
  • After receipt of the Go Ahead indication followed by the automatic exchange of answerbacks. (15% chose this)
  • Sent at the beginning of the message to request a direct TELEX connection. (15% chose this)
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What can be defined as the service that allows terrestrial information providers to send general information messages to pre-defined groups of subscribers?
  • SafetyNET™ (52% chose this)
  • FleetNET™ (42% chose this)
  • COSPAS-SARSAT (0% chose this)
  • InfoNET™ (6% chose this)
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A ship at anchor has been communicating with a shore station approximately 350 miles distant on a frequency in the 4 MHz band through early afternoon. 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. (16% chose this)
  • Communications should gradually improve and peak at night and early morning. (41% chose this)
  • Communications should slowly deteriorate but may be continued throughout the night. (19% chose this)
  • Communications should gradually deteriorate and become impossible on this frequency by night. (25% chose this)
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How would a shoreside party dial an Iridium terminal on a ship?
  • Dial the Inmarsat satellite gateway and then 881612345678. (15% chose this)
  • Dial the national exit code and then 881612345678 (50% chose this)
  • Dial the national exit code and then 870766891244# (23% chose this)
  • Dial the Iridium national access code and then 881612345678# (12% chose this)
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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. (0% chose this)
  • Select Routine priority, enter own vessel's MMSI, specify legal alternate frequency, F1B emission and transmit the properly formatted DSC call. (19% 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. (41% chose this)
  • Select Routine priority, enter other vessel's MMSI, specify legal alternate frequency, F1B emission and transmit the properly formatted DSC call. (41% chose this)
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How are Iridium antennas tracking the satellites?
  • They are flat-panel arrays that must be oriented to the satellites in their near-polar orbit. (0% chose this)
  • They are directional dish antennas that must track the satellites as they pass overhead. (12% chose this)
  • They are omni-directional dish antennas that locate the satellites as they pass overhead. (38% chose this)
  • They are omni-directional antennas that receive signal as various satellites pass overhead. (50% chose this)
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BFEC SITOR (NBDP) transmissions might be used to?
  • Receive Coast station traffic lists, NAVTEX and VHF MSI broadcasts. (38% chose this)
  • Send and receive Distress TELEX communications and receive HF MSI or NAVTEX. (41% chose this)
  • Receive weather messages or download ARQ Coast Station traffic lists. (16% chose this)
  • Receive weather messages and send vessel weather OBS messages. (6% chose this)
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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. (3% 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. (45% chose this)
  • Press all of the “hot keys” available in the GMDSS console to ensure the RCC is notified. (24% chose this)
  • Send a multi-frequency DSC alert to ensure the RCC is notified regardless of Ionospheric propagation conditions. (28% chose this)
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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. (22% 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. (48% chose this)
  • Initiate call, observe exchange of answer-backs (WRU-AAB), send message, send KKKK to terminate radio link, receive MRN & time and charges. (19% 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. (11% chose this)
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What would cause an FBB antenna to lose constant lock on the satellite?
  • An indication on a meter or on the display terminal of lowered transmit power. (15% chose this)
  • Loss of the internal antenna pitch/roll sensors (IMS). (54% chose this)
  • An indication of a very high antenna elevation on the display terminal screen. (0% chose this)
  • An indication that the antenna has reached its maximum travel in one direction. (31% chose this)
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From an Inmarsat-C terminal, which of the following are correctly formatted address for sending TELEX messages to two Inmarsat-C terminals on vessels in the AOR-W?
  • 870766719020 first and 870436671929 second. (23% chose this)
  • 584436671929 first and 584766719020 second. (29% chose this)
  • 584466719020 first and 584436671929 second. (45% chose this)
  • 58176671920 first and 58146671929 second. (3% chose this)
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Which longitude corresponds to the AOR-E satellite for Inmarsat-C communications?
  • 54.0 W (41% chose this)
  • 25.0 E (24% chose this)
  • 143.5 E (18% chose this)
  • 98.0 W (18% chose this)
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The acronym SITOR (NBDP) stands for:
  • Simplified Telephony Over Radio (7% chose this)
  • Simplex TELEX Over Radio (50% chose this)
  • Simplified TELEX Over Radio (18% chose this)
  • Simplex Telephony Over Radio (25% chose this)
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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. (48% chose this)
  • Read the Distress EGC message and if the situation is too far away no response is required. (10% chose this)
  • Read the Distress EGC message and await instructions from the RCC as how to proceed to the distress. (0% 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. (41% chose this)
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What features in a Maritime Safety Terminal (MST) are required for FBB units to meet GMDSS requirements?
  • Distress Alert button, keyboard and either printer or dedicated display/memory.. (58% chose this)
  • Printer, keyboard and 505 Distress menus on the keypad. (0% chose this)
  • Printer, Distress Alert button and dedicated EGC receiver. (42% chose this)
  • FBB units do not require Maritime Safety terminals to be compliant. (0% chose this)
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What entry would you make on an Iridium terminal to make a telephone call to an Inmarsat terminal on another ship that is 300 miles west of San Francisco?
  • 00582430353680# (10% chose this)
  • 00881612376935 (28% chose this)
  • 00870765890074 (48% chose this)
  • 00582336850450+ (14% chose this)
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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. (14% chose this)
  • One-way communications to all stations, two-way communications, one-way communications to a single station. (25% chose this)
  • One-way communications to all stations, one-way communications to a single station, two-way communications. (50% chose this)
  • Two-way communications, one-way communications to all stations, two-way communications. (11% chose this)
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Which of the following statements concerning EGC configuration is FALSE?
  • NAVAREA selection should be monitored and appropriately updated. (6% chose this)
  • The originator of MSI information cannot specify receipt only by vessels within a specific geographical area, circular or rectangular. (45% chose this)
  • The originator of MSI information can specify receipt only by vessels within a specific geographical area, circular or rectangular. (26% chose this)
  • GMDSS operators generally can select additional NAVAREAS to acquire EGC messages of interest to the vessel. (23% chose this)
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What is the normal specific gravity of a fully charged lead acid battery cell? What device is used to measuring the electrolyte of a lead acid battery?
  • 1.375 Voltmeter (17% chose this)
  • 1.180 Voltmeter (13% chose this)
  • 1.210 Hydrometer (23% chose this)
  • 1.265 Hydrometer (47% chose this)
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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. (0% chose this)
  • Request repairs of the Sat-C system and wait until within range of NAVTEX. (4% chose this)
  • Select 518 kHz FEC TELEX on the MF/HF console to receive MSI. (50% chose this)
  • Select an HF MSI frequency and ARQ TELEX mode to receive MSI. (46% chose this)
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Which statement concerning Inmarsat-FBB and Inmarsat-C terminals is correct?
  • Inmarsat-FBB terminals require GPS input, in order to enable the initial acquisition for satellite tracking. (45% chose this)
  • Inmarsat-FBB terminals require gyro and GPS input, in order to enable automatic satellite tracking. (16% chose this)
  • Inmarsat-C terminals require only GPS input, in order to enable automatic satellite tracking. (6% chose this)
  • Inmarsat-C terminals require continuous GPS input, in order to enable automatic satellite tracking. (32% chose this)
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What is an advantage of an Iridium terminal for making voice calls?
  • It can use compatible terrestrial cellular phone networks if available. (50% chose this)
  • Dual use technology permits Inmarsat satellites as well as Iridium satellites to be used. (25% chose this)
  • Dual use technology permits terrestrial cellular phone calls and Inmarsat calls. (14% chose this)
  • It can make calls only through the Iridium satellite system. (11% chose this)
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Which of the following situations would normally use the Urgency priority?
  • A crewmember falling over the side. (12% chose this)
  • A serious medical situation involving a crewmember with potential loss of life. (39% chose this)
  • An important meteorological warning concerning hazardous weather. (3% chose this)
  • A cargo shift or weather situation considered to be of greater hazard than would justify a Safety priority designation. (45% chose this)
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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. (28% chose this)
  • FEC mode broadcasts can be passively received without the transmitter being active. (47% chose this)
  • Weather broadcasts are always made in ARQ mode to ensure reception. (16% chose this)
  • ARQ mode communications can be passively received without the transmitter being active. (9% chose this)
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The "short rules" of propagation necessary to select the appropriate frequency band are:
  • Shorter distance = Higher Frequency, Daytime = Higher Frequency. (17% chose this)
  • Shorter distance = Lower Frequency, Daytime = Higher Frequency. (63% chose this)
  • Shorter distance = Higher Frequency, Daytime = Lower Frequency. (13% chose this)
  • Shorter distance = Lower Frequency, Daytime = Lower Frequency. (8% chose this)
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When Inmarsat-FBB and Inmarsat-C terminals are compared:
  • Inmarsat-FBB antennas are larger, but omni-directional, while Inmarsat-C antennas are smaller and parabolic, for aiming at the satellite. (4% chose this)
  • Inmarsat-FBB antennas are parabolic and smaller for higher gain, while Inmarsat-C antennas are larger but omni-directional. (4% chose this)
  • Inmarsat-C antennas are smaller, but omni-directional, while Inmarsat-FBB antennas are parabolic for lower gain. (39% chose this)
  • Inmarsat-FBB 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. (54% chose this)
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Which of the following is utilized to transmit Enhanced Group Calls?
  • COSPAS satellite (0% chose this)
  • HF SITOR (NBDP) shore stations (28% chose this)
  • NAVTEX shore stations (12% chose this)
  • Inmarsat satellite (60% chose this)
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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. (17% chose this)
  • The SAR jurisdiction software automatically updates the “hot-key” menu based on the vessel’s position. (14% chose this)
  • The LES code is determined by the NAVAREA based on the vessel’s current position. (17% 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. (52% chose this)
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What is the primary purpose of an Iridium LES?
  • The LES is required for ship-ship Inmarsat communications, ship-shore communications are handled by terrestrial Coast Radio Stations. (15% chose this)
  • The LES monitors all operations of the satellite and assigns channels and frequencies to the vessel. (27% chose this)
  • The LES makes the satellite connection between the vessel and the requested shore destination. (45% chose this)
  • The LES is dedicated only to processing all vessel Distress priority calls. (12% chose this)
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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 AOR-E?
  • 581366269025 (10% chose this)
  • 870466269025 (20% chose this)
  • 870763972514 (50% chose this)
  • 581761138138 (20% chose this)
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Which of the following is a correctly formatted Inmarsat-C address book entry for sending TELEX communications to two Inmarsat-C terminals in the POR?
  • 583452998777 first and 583423500120 second. (33% chose this)
  • 582450302113 first and 582761579051 second. (10% chose this)
  • 582452998777 first and 582423500120 second. (50% chose this)
  • 582762267098 first and 582450302113 second. (7% chose this)
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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. (14% chose this)
  • Enter Azimuth and Elevation values correctly so the Inmarsat-C SES can find the NCS CC. (21% chose this)
  • Remove stack deposits and other debris from the antenna to prevent degraded performance. (52% chose this)
  • Adjust a reference oscillator or synthesizer to tune the unit to the NCS CC. (14% chose this)
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Which of the following is a correctly formatted Inmarsat-C address book entry for sending TELEX communications to a vessel in the POR?
  • 582436559121 (54% chose this)
  • 870436559121 (21% chose this)
  • 582436559121+ (14% chose this)
  • 583436559121+ (11% chose this)
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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. (15% chose this)
  • The transceiver may be switched out of the marine bands or the frequency may not match the requested priority or emission. (44% chose this)
  • The automatic transceiver switching software always detects improper priorities, emissions & frequencies to ensure there is no danger. (9% 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. (32% chose this)
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How is maximum communications coverage provided by satellites in the Inmarsat maritime satellite service?
  • Four satellites in polar orbit to provide worldwide coverage. (14% chose this)
  • Four satellites in geo-stationary orbit for each Inmarsat Service (C and FBB). (18% chose this)
  • Four satellites in geo-stationary orbit approximately 22,184 miles above the equator. (54% chose this)
  • Through coordinated use of COSPAS-SARSAT satellites. (14% chose this)
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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. (16% chose this)
  • To provide multi-mode communications between the Inmarsat station placing a call and the coast radio station that will deliver it. (16% 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. (19% chose this)
  • To monitor and control communications through the Inmarsat satellite for which it is responsible. (48% chose this)
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Selective FEC communications (SFEC) are employed when:
  • Multiple stations without a group SELCAL must receive communications without using their transmitters (Radio Silence). (21% chose this)
  • Multiple stations must receive communications by using their transmitters to achieve phasing. (12% chose this)
  • An individual station must receive communications by using their transmitter to achieve phasing and block other stations from breaking in. (24% chose this)
  • An individual station must receive communications without using any transmitters (Radio Silence). (44% chose this)
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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. (19% chose this)
  • The average delivery time for a message sent by Inmarsat-C is about 10 minutes. (47% chose this)
  • Date/time notification of delivery is possible only through Inmarsat-FBB. (3% 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. (31% chose this)
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How is a voice call to a shoreside destination typically dialed from an Iridium terminal handset?
  • Dial * to gain access to the Iridium system then dial the country code, subscriber I.D. and then the # sign. (17% chose this)
  • Dial 00 for automatic dialing, then dial the country code and IMN, then the +sign (17% chose this)
  • Dial 00 for automatic dialing, dial the country code subscriber I.D and IMN and then the #sign (13% chose this)
  • Dial 00 for automatic dialing, then the country code and subscriber I.D. (53% chose this)
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Why must the GMDSS operator be able to set-up FEC & ARQ modes and differentiate between them?
  • The proper mode of SFEC must be selected for reception of HF MSI and ARQ selected for initial follow-on TELEX communications in a Distress situation (4% chose this)
  • The proper mode must be selected for follow-on TELEX communications in a Distress situation and for the reception of HF MSI. (59% chose this)
  • The ARQ TELEX mode must be selected for follow-on TELEX communications in a Distress situation and the BFEC TELEX mode selected for reception of HF MSI. (22% chose this)
  • The BFEC TELEX mode must be selected for follow-on TELEX communications in a Distress situation and the ARQ TELEX mode selected for reception of HF MSI. (15% chose this)
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What statement is true regarding Inmarsat-C?
  • There is a propagation delay, but a direct connection is made between the ship and shore users. (9% chose this)
  • There are delays in establishing communications. Then a direct real-time connection is maintained with the other party. (14% chose this)
  • The TELEX message is stored until the mailbox is accessed by the station desiring to retrieve their message. (5% 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. (73% chose this)
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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. (36% 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. (64% chose this)
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Which LES should a GMDSS Radio Operator select to update an Inmarsat-C Distress alert message if the vessel is in the southern Pacific Ocean near the Dateline and logged-in to the POR satellite?
  • Santa Paula (USA) or Beijing (PRC) would be the best choice depending on SAR jurisdiction. (27% chose this)
  • EIK (Norway) or Nudol (Russia) would be the best choice depending on SAR jurisdiction. (3% chose this)
  • Yamaguchi (Japan) or Nakhoda (Russia) would be the best choice depending on SAR jurisdiction. (17% chose this)
  • Burum (Australia) or Santa Paula (USA) would be the best choice depending on SAR jurisdiction. (53% chose this)
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What additional equipment provides the maximum availability for receiving SafetyNET™ broadcasts when the associated Inmarsat-C SES is engaged in communications?
  • An integrated EGC receiver with the existing Inmarsat-C equipment. (24% chose this)
  • HF SSB can be used to receive voice MSI broadcasts. (8% chose this)
  • A separate EGC receiver. (64% chose this)
  • Automatic switching between Inmarsat-C and EGC functions. (4% chose this)
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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. (6% chose this)
  • Call up and edit a pre-saved detailed Distress message, select the closest LES and press the “hot-key.” (9% 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. (36% 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. (48% chose this)
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How does an FBB terminal fully meet compulsory GMDSS requirements?
  • All FBB terminals are automatically certified under GMDSS by the IMO. (20% chose this)
  • FBB terminals are not certified for use by GMDSS compulsory vessels. (10% chose this)
  • The FBB terminal is replaced by a Maritime Safety Terminal, Distress Alert button, keyboard and printer. (17% chose this)
  • The addition of a Maritime Safety Terminal, Distress Alert button, keyboard and printer or dedicated display. (53% chose this)
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The Iridium terminal typically displays what status indicators?
  • Power, GPS, signal strength, data and handset port conditions. (52% chose this)
  • Power, GPS, signal strength and satellite tracking azimuth and elevation. (35% chose this)
  • GPS satellites overhead, conditions of data and handset ports and data throughput. (10% chose this)
  • Geo-stationary satellite status, signal strength and data and handset port conditions. (3% chose this)
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Detailed Distress situation report message formats can best be found in?
  • IAMSAR manual Volume III. (52% chose this)
  • ITU list of RCC and Coast stations. (6% chose this)
  • AMVER chapter of NGA PUB 117. (6% chose this)
  • FCC Title 47, Part 80. (35% chose this)
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Which statement concerning Inmarsat-FBB and Inmarsat-C terminals is correct?
  • Both Inmarsat-FBB and Inmarsat-C units are subject to shadowing effects due to their omni-directional antennas. (6% chose this)
  • Both Inmarsat-FBB and Inmarsat-C units are subject to shadowing effects, but Inmarsat-FBB units have directional antennas. (52% chose this)
  • Both Inmarsat-FBB and Inmarsat-C units are subject to shadowing effects, but Inmarsat-C units have directional antennas. (13% chose this)
  • Both Inmarsat-FBB and Inmarsat-C units are subject to shadowing effects, due to their directional antennas. (29% chose this)
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A Coast Station that is described as ATOR typically provides what type of services?
  • NAVTEX BFEC weather broadcasts. (16% chose this)
  • ARQ SITOR (NBDP) connections to shoreside terminals. (50% chose this)
  • BFEC SITOR (NBDP) connections to shoreside terminals. (9% chose this)
  • SITOR (NBDP) HF weather broadcasts. (25% chose this)
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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. (7% chose this)
  • 8 MHz during daylight hours and 16 MHz during darkness. (17% 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. (59% chose this)
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A ship has been communicating effectively on 16 MHz during daylight hours with a shore station at a distance of 3200 miles. Toward late afternoon and evening what effect would be noticed?
  • Communications should gradually deteriorate and become impossible on this frequency at night. (55% chose this)
  • Communications should be maintained with slight improvement in the signal received from the shore station. (16% chose this)
  • The gray line effect will prevent communications after dark. (3% chose this)
  • Communications should improve and peak at night. (26% chose this)
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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. (9% 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. (31% 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. (53% chose this)
  • Broadcasts of Maritime Safety Information, traffic lists, etc. can be copied by the receiving station in ARQ mode. (6% chose this)
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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. (4% chose this)
  • The vessel will request the shore station's answerback to confirm it has reached the correct station. (7% chose this)
  • The ship will transmit the desired command (such as DIRTLX+, OBS+ or AMV+) to the coast radio station. (26% chose this)
  • After exchanging answer-backs (WRU/AAB) the coast station transmits GA+? and awaits a command. (63% chose this)
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The USA-INT control on VHF units:
  • Was made necessary by a desire for more duplex channels in the U.S. (3% chose this)
  • Correctly set, will result in duplex operations in U.S. Coastal waters on the "alpha" channels. (19% chose this)
  • Correctly set, will result in simplex operations in U.S. Coastal waters on the "alpha" channels. (55% chose this)
  • Was made necessary by a desire to convert simplex international channels to duplex channels in the U.S. (23% chose this)
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All country codes which are transmitted by MF/HF SITOR (NBDP) are preceded by which character(s)?
  • 00 (19% chose this)
  • + (22% chose this)
  • 0 (53% chose this)
  • DIR (6% chose this)
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When Inmarsat-FBB and Inmarsat-C terminals are compared:
  • Inmarsat-FBB units provide greater communications capabilities, with the benefits of greater size, weight, installation expense and initial cost. (0% chose this)
  • Inmarsat-C provides lesser communications capabilities, with the trade-offs of greater size, weight, installation expense and initial cost. (10% chose this)
  • Inmarsat-FBB units provide greater communications capabilities, with the trade-offs of greater size, weight, installation expense and initial cost. (59% chose this)
  • Inmarsat-C units are of smaller size, weight, installation expense and initial cost and provide greater communications capabilities due to modern technology. (31% chose this)
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It is possible to transmit all of the following via Inmarsat-C from a vessel EXCEPT?
  • TELEX (11% chose this)
  • Text for delivery by fax. (21% chose this)
  • Voice (61% chose this)
  • x.400 data services (7% chose this)
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FEC SITOR (NBDP) transmissions are normally used to?
  • Receive Coast station traffic lists, NAVTEX and VHF MSI broadcasts. (29% chose this)
  • Receive weather messages, Coast Station traffic lists and company messages. (10% chose this)
  • Receive HF MSI and NAVTEX. (55% chose this)
  • Receive company communications sent through coast stations. (6% chose this)
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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. (3% 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. (42% chose this)
  • Select an HF MSI frequency and FEC TELEX mode to receive MSI. (55% chose this)
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Which of the following is true of SITOR (NBDP) ARQ mode:
  • The ship station sends a group of 3 characters, the shore station checks for proper parity. If parity is OK, the shore station indicates readiness for transmission of the next 3 characters. (71% chose this)
  • The ship station sends a group of 3 characters twice and then waits for an "RQ" signal to indicate proper receipt before continuing transmission. (4% chose this)
  • The Ship station sends each character twice, using a time diversity system to ensure proper parity. (8% chose this)
  • The ship station sends a group of 3 characters, the shore station checks for proper parity and then requests the same group be resent to enable error correction. (17% chose this)
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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. (69% 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. (23% chose this)
  • The U.S. Coast Guard coordinates the communications and assigns the working channel. (8% chose this)
  • U.S. flag ships are licensed to communicate only with U.S. coast radio stations. (0% chose this)
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Why is the correct selection of the LES in the Inmarsat-C 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. (72% chose this)
  • Inmarsat-C terminals use the GPS position to automatically determine the optimum LES choice in a Distress situation. (8% 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. (8% chose this)
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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. (10% chose this)
  • After exchanging answer-backs (WRU-AAB) with the vessel, the coast radio station transmits GA+?. (58% 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. (19% 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. (13% chose this)
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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. (10% chose this)
  • Examine the Transmitted Data Directory or the printer to recover the information. (26% chose this)
  • Call the Distress vessel on the DSC frequency and request a retransmission. (6% chose this)
  • Examine the Received Data Directory or the printer to recover the information. (58% chose this)
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Which of the following statements concerning SITOR (NBDP) communications is true?
  • In ARQ, each character is transmitted twice, about 250 milliseconds apart. (7% 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. (19% chose this)
  • SITOR (NBDP) communications can be used to contact a NAVTEX transmitting station when requesting a repeat transmission of a missed NAVTEX message. (7% chose this)
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Upon receipt of SafetyNET™ 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. (53% 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. (32% chose this)
  • No immediate action is required by the operator since the transmission will be automatically acknowledged by the receiving vessel. (3% chose this)
  • A periodic alarm tone will be heard until the radio operator prints the message from the unit's memory. (12% chose this)
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Which longitude corresponds to the POR's satellite location for Inmarsat-C communications?
  • 25.0 E (9% chose this)
  • 54.0 W (17% chose this)
  • 98.0 W (23% chose this)
  • 143.5 E (51% chose this)
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Which of the following would be a valid SELCAL for use in ARQ communications?
  • 1106 (56% chose this)
  • 212420 WHAQ X. (0% chose this)
  • Four marks (ones) and three spaces (zeroes) forming the binary signal "1001101". (25% chose this)
  • This is established by the communications protocol used with the modem. (19% chose this)
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The sequence ARQ, FEC, SFEC best corresponds to which of the following sequences?
  • One-way communications to a single station, one-way communications to all stations, two-way communications. (11% chose this)
  • One-way communications to all stations, two-way communications, one-way communications to a single station. (5% chose this)
  • Two-way communications, one-way communications to all stations, one-way communications to a single station. (49% chose this)
  • Two-way communications, One-way communications to a single station, One-way communications to all stations. (35% chose this)
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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.) (60% chose this)
  • No additional action is necessary after turning on the receiver and aiming the antenna at the desired satellite. (10% chose this)
  • The system needs only to be commissioned and turned on. (3% chose this)
  • The GMDSS Radio Operator must log-in to the desired satellite and receive the message reference number (MRN) from the LES. (27% chose this)
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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. (60% chose this)
  • Integrating EGC receiver with the existing Inmarsat-C equipment. (27% chose this)
  • Redundancy using HF SSB to receive voice broadcasts. (10% chose this)
  • Automatic switching between Inmarsat-C and EGC functions. (3% chose this)
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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+ (13% chose this)
  • KKKK, BRK+, AMV+ (23% chose this)
  • BRK+, DIRTLX+, AMV+ (6% chose this)
  • DIRTLX, BRK+, AMV+ (58% chose this)
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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. (7% 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. (15% chose this)
  • An additional hardware upgrade is required to enable your ship’s Inmarsat-C terminal to send and receive e- mails. (67% chose this)
  • Not all land earth station service providers support e-mail service. (11% chose this)
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Which of the following is a correctly formatted Inmarsat-C address book entry for sending TELEX communications to an Inmarsat-C terminal in the AOR-W?
  • 584765044177 (17% chose this)
  • 584431014013 (60% chose this)
  • 870331014013 (20% chose this)
  • 584331014013+ (3% chose this)
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What is an advantage of the Iridium system for placing ship-ship calls?
  • Iridium terminals are compatible with the Inmarsat system for maximum flexibility. (16% chose this)
  • All ship-ship calls are passed through Iridium ground stations and then forwarded to the other ship. (16% chose this)
  • Ships-ship calls are routed through the satellites and passed through ground stations. (10% chose this)
  • Iridium satellites can pass the calls directly to the other ship using gateway signaling. (58% chose this)
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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." (34% 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." (59% 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. (6% chose this)
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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. (10% chose this)
  • The amplitudes in the sideband(s) changes but the radio carrier frequency remains constant. (61% chose this)
  • The amplitude of the carrier is changed but there is still only a single frequency being transmitted. (29% chose this)
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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. (9% chose this)
  • Enter PAN PAN or SECURITE into the heading of the message file so the message will be routed by priority. (22% chose this)
  • Only Routine or Distress priority messages can be sent from an Inmarsat-C terminal. (9% 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. (59% chose this)
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How is an Iridium Distress alert routed to the correct RCC?
  • The RCC is determined by the geographical area of the vessel or chosen manually by the ship’s officers. (73% chose this)
  • By dialing the correct code on the telephone remote unit. (15% 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)
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A vessel is tracking the AOR-W satellite. To initiate an F77 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# (63% chose this)
  • Select LES #002 then dial 11234567890# (10% chose this)
  • Select LES 104# then dial 11234567890+ (10% chose this)
  • Select LES 001+ then dial 123 4567890# (17% chose this)
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Which of the following would be a valid sequence to request an F77 automatically dialed ship-ship voice call to an F77 terminal on a vessel tracking the IOR satellite?
  • 00583430662888# (0% chose this)
  • 00870430662888# (22% chose this)
  • 00583763240864# (7% chose this)
  • 00870763240864# (70% chose this)
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Of the following, which is true of SITOR (NBDP) ARQ mode?
  • The acceptance code consists of three characters. (12% chose this)
  • A continuous data stream is transmitted. (12% chose this)
  • Forward error correction reduces the number of errors. (21% chose this)
  • Each data block consists of three characters. (56% chose this)
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Which statement is FALSE regarding a GMDSS equipped ship?
  • Ships must have the required equipment inspected at least once every 12 months. (11% chose this)
  • The regulations apply to all passenger ships regardless of size and cargo ships of 300 gross tons and upwards. (14% 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. (68% chose this)
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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. (4% chose this)
  • Selecting a frequency in the MF band averts interference from severe static discharges. (16% 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. (76% chose this)
  • Re-position the antenna toward the coast radio station and press the "call request" button. (4% chose this)
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How does an FBB terminal notify shore authorities of a Distress situation with priority pre-emption?
  • Dial 505 on the keypad to request an “SOS” voice call. (3% chose this)
  • Dial 505 on the keypad to make a pre-emptive priority Distress call. (11% chose this)
  • Press the dedicated Distress Alert button on the FBB handset. (31% chose this)
  • Press the dedicated Distress Alert button on the connected Maritime Safety Terminal. (54% chose this)
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Which functions may the holder of a GMDSS Radio Operator License not perform on the Inmarsat-C equipment?
  • Selection of LES for routine traffic. (10% chose this)
  • Maintain the antenna clear of soot, paint, etc. (27% chose this)
  • Adjust the azimuth and elevation values. (63% chose this)
  • Logon, traffic and logoff functions. (0% chose this)
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What is the primary danger of an Inmarsat-C terminal if it is not properly logged out?
  • The vessel will be barred in the future from sending traffic through an LES. (4% 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. (70% chose this)
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What is the best way to use Iridium to alert an RCC of a Distress and then follow-up with voice SAR communications?
  • Using the combo Alert/voice feature and then dial the telephone number of the RCC. (12% chose this)
  • Using the combo Alert/Voice feature. The terminal will initiate a Distress voice call to the RCC, (58% chose this)
  • It is necessary to wait until the RCC receives the Alert requesting they initiate a voice call to the vessel. (12% chose this)
  • First use the Alert feature and then wait for the RCC to call back to the vessel. (18% chose this)
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At mid-day in the summer, what would be the best choice in attempting to communicate, using J3E voice with a shore station some 1800 miles distant?
  • VHF-FM (3% chose this)
  • Lower HF bands (21% chose this)
  • Higher HF bands (66% chose this)
  • MF (10% chose this)
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What factors bear on the choice of NCS on an Inmarsat terminal?
  • NAVAREA weather patterns, shore-ship routine communications, signal strength. (17% chose this)
  • Best email provider, preventing interference in port, Distress SAR choices. (3% chose this)
  • Signal strength, Distress SAR choices, choice of MSI NAVAREAS. (63% chose this)
  • Minimize overlapping footprint coverage, reduce ship-ship message costs, receive BALD warnings. (17% chose this)
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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. (17% chose this)
  • ARQ transmissions are made in data groups consisting of three-character blocks. (63% chose this)
  • ARQ communications rely upon error correction by time diversity transmission and reception. (10% chose this)
  • Forward error correction is an interactive mode. (10% chose this)
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At mid-day, what would be the best choice in attempting to communicate with a shore station some 75 miles distant?
  • MF (61% chose this)
  • VHF-FM (15% chose this)
  • 22 MHz band (12% chose this)
  • 16 MHz band (12% chose this)
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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. (15% chose this)
  • Use the SEND/REC or TRANSMIT menu, compose a text file and use the file attach function in the file menu. (15% chose this)
  • Internet addresses cannot be reached from an Inmarsat-C terminal without a separate e-mail computer. (9% 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. (61% chose this)
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A vessel loses Inmarsat-FBB 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. (15% chose this)
  • Misalignment of the shadow correction filter. (4% chose this)
  • The vessel sailed beyond the footprint of the satellite coverage. (7% chose this)
  • The ship’s superstructure is now blocking the satellite signal. (74% chose this)
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Which of the following would indicate an Inmarsat-C terminal?
  • A 9-digit number beginning with the MID. (14% chose this)
  • A 9-digit number always starting with 4. (69% chose this)
  • A 9 digit number always starting with 970. (17% chose this)
  • A 9-digit number always starting with 3. (0% chose this)
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Which longitude corresponds to the IOR's satellite location for Inmarsat-C communications?
  • 25.0 E (67% chose this)
  • 143.5 E (13% chose this)
  • 54.0 W (10% chose this)
  • 98.0 W (10% chose this)
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Which of the following statements concerning Iridium satellites is true?
  • They are in a geo-stationary orbit, in order to provide true global coverage. (16% chose this)
  • They provide coverage to vessels in all of the world's navigable waters including polar regions. (80% chose this)
  • They are in an equatorial orbit, in order to provide true global coverage. (0% 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)
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Which statement best defines the SITOR (NBDP) acronym "ARQ"?
  • Error Correction when 2 stations are in direct & phased telephone communications with each other. (15% chose this)
  • Error correction for one-way TELEX transmissions to a single other station. (6% chose this)
  • Error correction for one-way TELEX broadcasts of weather or navigation information. (18% chose this)
  • Error Correction with 2 stations are in direct & phased TELEX communications with each other. (61% chose this)
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If you are tracking the AOR-W satellite and wish to communicate by F77 voice using LES Southbury with another ship tracking the AOR-E satellite what is the proper procedure?
  • Select LES: 001# then dial 00870763972310# (74% chose this)
  • Select LES: 004# then dial 11582430315036# (7% chose this)
  • Select LES: 001# then dial 00851636824323# (11% chose this)
  • Select LES: 003# then dial 00581430326430# (7% chose this)
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Which of the following are correctly formatted Inmarsat-C address book entries for sending communications to an F77 with a fax machine in the AOR-W?
  • 870768790319 (65% chose this)
  • 8704336837925 (10% chose this)
  • 584768790319 (26% chose this)
  • 1 870 768790319 (0% chose this)
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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. (10% chose this)
  • Propagation rules, Sunspot cycle status and seasonal variations (winter & summer) must always be employed to calculate the proper band selection. (19% chose this)
  • Propagation "rules of thumb" should be combined with Solar flare alerts to determine band selection. (6% chose this)
  • Propagation "rules of thumb" are usually sufficient for routine operations. (65% chose this)
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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 (23% chose this)
  • 571436772983 (7% chose this)
  • 581323500120+ (3% chose this)
  • 581423500120 (67% chose this)
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To ensure effective HF communications, GMDSS operators should:
  • Employ the short rules of propagation selection or rely on previous successful communications as a guide. (61% chose this)
  • Disregard the short rules of propagation selection and try different bands until one works. (3% chose this)
  • Do not rely on previous successful communications on the selected frequency band - the ionosphere changes too rapidly and inconsistently. (12% chose this)
  • Rely on the equipment calculations of Optimum Usable Frequency. (24% chose this)
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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.) (65% chose this)
  • Insert the Internet address into the correct field when creating the message file. (16% chose this)
  • Select the recipient using the e-mail code into the DNID/ENID setup e-mail function. (13% chose this)
  • Insert the Internet address into the correct field of the System setup e-mail function. (6% chose this)
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A vessel, before transiting the Panama Canal, on a voyage from Hawaii to Florida, loses the ability to communicate via Inmarsat-C. The most likely cause is:
  • The vessel has sailed beyond the coverage area of the Pacific satellite. (69% chose this)
  • The vessel has sailed beyond the coverage area of the Santa Paula Land Earth Station. (10% chose this)
  • The vessel has sailed beyond the coverage area of the Western Atlantic satellite. (17% chose this)
  • The satellite orbit is beyond the usable range of the SES. (3% chose this)
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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. (13% chose this)
  • If all satellite channels are busy then one of them will be preempted by a Distress request. (10% chose this)
  • Any Distress request is automatically switched to an Inmarsat Distress working frequency. (65% chose this)
  • Any request message with Distress priority is automatically recognized by the LES and a satellite channel is instantly assigned. (13% chose this)
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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+ (75% chose this)
  • MSG+ (0% chose this)
  • GA+? (25% chose this)
  • ENTER (0% chose this)
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Which of the following is true of SITOR (NBDP) in FEC mode, in the presence of static crashes.
  • FEC reduces the error rate by transmitting each character twice. (70% chose this)
  • Data flow rate depends on signal propagation. (13% chose this)
  • Idle characters are sent upon request. (3% chose this)
  • Transmitter and receiver do not synchronize. (13% chose this)
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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. (17% 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. (10% 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. (3% chose this)
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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+ (12% chose this)
  • (51)440122 (0% chose this)
  • 51440122 (84% chose this)
  • 51440122# (4% chose this)
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An incoming DSC Distress alert on 8414.5 kHz will have what result?
  • The DSC controller will emit both an audible and visual alarm. (26% chose this)
  • The particulars of the alert may be printed out. (3% chose this)
  • The Distress information contained in the alert will be sent to the data directory. (3% chose this)
  • All of these answers would typically occur. (68% chose this)
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In ARQ, when the information sending station (ISS) receives a signal that the parity check failed what happens?
  • The next block will be sent. (7% chose this)
  • The data link will break. (7% chose this)
  • The acknowledge light should illuminate. (11% chose this)
  • The last block will be resent. (75% chose this)
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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 (7% chose this)
  • Higher UHF bands (11% chose this)
  • Communications are impossible at this distance. (7% chose this)
  • HF bands (75% chose this)
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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# (23% chose this)
  • 810453345678 (70% chose this)
  • 81(045)3345678 (7% chose this)
  • 81 (045) 334-5678 (0% chose this)
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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), Beijing (P.R.C.), Burum (Netherlands) (7% chose this)
  • Southbury (USA), Burum (Netherlands), or EIK (Norway). (70% chose this)
  • Santa Paula (USA), Hai Phong (Vietnam), Yamaguchi (Japan). (23% chose this)
  • Beijing (PRC), Fucino (Italy), Nudol (Russia). (0% chose this)
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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. (10% chose this)
  • Listen to shore station "free signals" and choose the band with the strongest signal. (72% chose this)
  • If static interference is present, try lower bands first. (7% chose this)
  • During nighttime, choose higher frequencies. Choose lower frequencies in the daytime. (10% chose this)
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With an Inmarsat-C LES, how are messages routed to receiving stations?
  • All messages are forwarded via a store and forward network. (61% chose this)
  • Direct connections are made to the receiving stations via gateways. (6% chose this)
  • Intermediary stations are used to connect the sending station with the receiving station in a real-time mode. (19% chose this)
  • Messages are stored until the network is polled by the receiving station. (14% chose this)
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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. (32% chose this)
  • Longer distance = lower frequency, Shorter distance = lower frequency, Daytime = lower frequency, nighttime = higher frequency. (0% chose this)
  • Longer distance = higher frequency, Shorter distance = lower frequency, Daytime = higher frequency, nighttime = lower frequency. (65% chose this)
  • Longer distance = higher frequency, Shorter distance = higher frequency, Daytime = lower frequency, nighttime = higher frequency. (3% chose this)
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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. (28% 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. (61% 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. (8% chose this)
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What is the purpose of a CODEC?
  • Noise and echo-canceling used in TELEX operation. (3% chose this)
  • To enable Distress communications. (10% chose this)
  • To enable data communications. (10% chose this)
  • To convert analog voice signals to digital transmissions. (76% chose this)
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What will cause an individual battery cell to reverse polarity.
  • High discharge rates without allowing for a cool down period. (13% 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. (71% chose this)
  • Insufficient charging which does not bring all of the cells up to full charge. (6% chose this)
  • The charging circuits are connected in the correct polarity but all of the cells are equally charged. (10% chose this)
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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. (76% chose this)
  • Transmit and receive frequencies must always be manually entered from the keypad. (3% chose this)
  • Transmit and receive frequencies must always be recalled from a database or memory. (3% chose this)
  • Frequencies in the manufacturer’s databases are always accurate and legal for use. (17% chose this)
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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. (0% chose this)
  • Adjust the station's EIRP. (12% chose this)
  • Adjust any front panel controls. (85% chose this)
  • Adjust a reference oscillator or synthesizer. (4% chose this)
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Which of the following statements concerning COSPAS-SARSAT is FALSE?
  • EPIRBs, ELTs, and PLBs use the system primarily for Distress alerting. (3% chose this)
  • These satellites monitor 406 MHz for EPIRB signals. (9% chose this)
  • After initiating a call request and selecting the LES, these satellites may be used for commercial messages. (67% chose this)
  • These satellites use Doppler shift measurement to determine the location of the beacons. (21% chose this)
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How may a Distress Alert be initiated to a specific RCC through Iridium?
  • By transmitting the Distress message on the U.S. Coast Guard's Iridium monitoring channel. (0% chose this)
  • By adding the word "Distress" in the first line of the message's preamble. (9% chose this)
  • All Iridium terminals chose the optimum RCC based upon the vessel’s SAR jurisdiction. (22% chose this)
  • By programming the preferred RCC and then pressing the dedicated Alert keys. (69% chose this)
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Which of the following would indicate an Inmarsat-C terminal?
  • 003698202 (3% chose this)
  • 325467263 (3% chose this)
  • 436782433 (74% chose this)
  • 764835982 (19% chose this)
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Which satellite should be chosen when the vessel is operating between Japan and the Bering Sea?
  • AOR-W (13% chose this)
  • IOR (6% chose this)
  • POR (72% chose this)
  • AOR-E (9% chose this)
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GMDSS operators should routinely focus on the factors affecting propagation in what priority?
  • Distance & time of day, seasonal variations, sunspot cycle, solar flare alerts. (77% chose this)
  • Sunspot cycle, distance & time of day, seasonal variations, solar flare alerts. (3% chose this)
  • Solar flare alerts, distance & time of day, sunspot cycle, seasonal variations. (17% chose this)
  • Solar flare alerts, sunspot cycle, seasonal variations, distance & time of day. (3% chose this)
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Which of the following best describes Inmarsat-C operation?
  • Is an analog-based system. (20% chose this)
  • Requires a stabilized directional antenna. (0% chose this)
  • Provides for voice, TELEX, high and low-speed data and compressed video communications. (3% chose this)
  • Is a digital store-and-forward system that also provides Enhanced Group Call, data reporting, polling and Distress alerting capabilities. (77% chose this)
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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 (82% chose this)
  • 583442519372 (11% chose this)
  • 1870442519372 (4% chose this)
  • 870323500121 (4% chose this)
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Which of the following conditions does not typically impair Inmarsat-FBB 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. (20% chose this)
  • Normal precipitation from gales and storms. (77% chose this)
  • A satellite whose signal is on a low elevation, below the horizon. (0% chose this)
  • Travel beyond the effective radius of the satellite. (3% chose this)
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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. (19% 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. (8% chose this)
  • A constant 30 volt reading on the GMDSS console voltmeter. (64% chose this)
  • After testing the station on battery power, the ammeter reading indicates a high rate of charge that then declines. (8% chose this)
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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. (3% chose this)
  • Change the ship's course. (79% chose this)
  • Increase the receiver gain. (7% chose this)
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Which Inmarsat Earth stations could a GMDSS Radio Operator select to update an Inmarsat- C Distress alert message if the vessel is in the Mediterranean Sea and logged into the AOR-E satellite?
  • Fucino (Italy), Assaguel (France) or Burum (Netherlands). (79% chose this)
  • Pune (India), EIK (Norway), Sentosa or Beijing (P.R.C.). (7% chose this)
  • Yamaguchi (Japan), Southbury (USA), Fucino (Italy). (3% chose this)
  • Beijing (P.R.C.), Southbury (USA) or EIK (Norway). (10% chose this)
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What does the term "ARQ" mean in SITOR (NBDP) operations?
  • Automation Repeat Request (0% chose this)
  • Automaton Repeat Request (14% chose this)
  • Automatic Repeat Request (79% chose this)
  • Automatic Request Repeat (7% chose this)
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Which of the following would indicate an F77 terminal?
  • A 9-digit number always starting with 76. (72% chose this)
  • A 12-digit number starting with the MID. (9% chose this)
  • A 9-digit number ending with the MID. (3% chose this)
  • A 9-digit number always starting with 4. (16% chose this)
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What is the effect of temperature on the specific gravity of lead acid batteries?
  • Higher temperature results in a higher specific gravity reading. (13% chose this)
  • Higher temperature results in a lower specific gravity reading. (77% 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)
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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. (3% chose this)
  • Operates simplex on Ch-70 and at least one other channel. (75% chose this)
  • Effective radiated power should be a minimum of 0.25 Watts. (19% chose this)
  • The antenna is fixed and non-removable. (3% chose this)
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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 (20% chose this)
  • 30842267+ (0% chose this)
  • (582)30842267 (0% chose this)
  • 30842267 (80% chose this)
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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. (75% chose this)
  • Transmission of synoptic weather reports and company traffic. (6% chose this)
  • Reception of the mandatory scheduled BALD MSI messages. (16% chose this)
  • Reception of company traffic related to ship’s business. (3% chose this)
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How often should the charge condition of RSE GMDSS batteries be checked?
  • Every day with the battery charger on trickle charge. (23% chose this)
  • At least every 30 days with the battery charger turned off. (69% chose this)
  • At least every 30 days with the battery charger on full manual charge. (6% chose this)
  • Weekly with the battery charger on full manual charge. (3% chose this)
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Messages are transmitted by an Inmarsat LES according to what criteria?
  • First In, First Out (14% chose this)
  • Priority (83% chose this)
  • Last In, First Out (0% chose this)
  • Serial Number (3% chose this)
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When engaging in voice communications via an Inmarsat-FBB terminal, what procedures are used?
  • CODECs may be used to digitize the voice signal. (78% chose this)
  • Noise-blanking must be selected by the operator. (3% chose this)
  • The voice signal must be compressed to fit into the allowed bandwidth. (13% chose this)
  • The voice signal will be expanded at the receiving terminal. (6% chose this)
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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. (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 SMS destinations. (78% 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. (9% chose this)
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If your vessel is in the IOR, which of the following is a correctly formatted Inmarsat-C address book entry for sending communications to a shoreside TELEX terminal number 77829 in the Philippines (TELEX country code 758)?
  • 75877829+ (3% chose this)
  • 87375877829 (9% chose this)
  • 58375877829 (17% chose this)
  • 75877829 (71% chose this)
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Which of the following statements concerning MMSI is true?
  • Coast station MMSI numbers have 9 digits starting with 4. (7% chose this)
  • All MMSI numbers are 9 digits and contain an MID. (83% chose this)
  • Ship station MMSI numbers can be 7 digits or 9 digits depending on the Inmarsat terminal. (0% chose this)
  • Group MMSI numbers must begin with 2 zeros. (10% chose this)
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Which of the following would indicate an Inmarsat-C terminal?
  • 436782011 (79% chose this)
  • 003662517 (6% chose this)
  • 325463325 (6% chose this)
  • 764848791 (9% chose this)
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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. (12% 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. (9% chose this)
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Which statement is correct regarding a method that a vessel experiencing problems with shadowing of an Inmarsat-FBB SES antenna by an on-board obstruction could use to attempt reliable communications?
  • Change course to remove the shadow. (90% chose this)
  • Change the Coast Station ID programming. (3% chose this)
  • Install a shadow correction filter. (0% chose this)
  • Switch from TELEX to voice mode. (7% chose this)
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When placing a TELEX call to a Coast Station, you should always:
  • Choose the closest station. (10% chose this)
  • Tune the transmitter on another frequency. (3% chose this)
  • Wait until the coast station sends his traffic list. (3% chose this)
  • Make sure the frequency is not occupied with normal traffic. (84% chose this)
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When logging into the Inmarsat system using Inmarsat-C, it is necessary to:
  • Enter your IMN when requested by the NCS. (6% chose this)
  • Select the Ocean Region or select the NCS. (74% chose this)
  • Enter the LES answer back when requested by the LES. (14% chose this)
  • Call the LES and inform them that you are now operating in the appropriate ocean region. (6% chose this)
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Which Inmarsat Earth Stations could a vessel utilize for Inmarsat-C traffic if operating off the Atlantic Coast of the United States and tracking the AOR-E satellite?
  • Beijing (P.R.C.), Yamaguchi (Japan) or Hai Phong (Vietnam). (0% chose this)
  • Southbury (USA), Burum (Netherlands) or Hai Phong (Vietnam) (10% chose this)
  • Pune (India), Burum (Netherlands) or Nudol (Russia). (0% chose this)
  • Southbury (USA), Burum (Netherlands) or Assaguel (France). (90% chose this)
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Which of the following situations would normally use the Safety priority?
  • A scenario concerning an important navigational or meteorological warning. (90% chose this)
  • A serious medical situation involving a crewmember. (3% chose this)
  • A crewmember falling over the side. (0% chose this)
  • Important company communications involving weather routing. (7% chose this)
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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. (0% chose this)
  • The Address book function (or manual entry) in the SEND/REC or TRANSMIT menu. (93% 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. (7% chose this)
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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. (0% chose this)
  • Log-on, traffic and log-off functions. (3% chose this)
  • Entry of position data and selection of LES. (0% chose this)
  • Optimize performance by adjusting the transmitter EIRP. (97% chose this)
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What are the directional characteristics of the Inmarsat-C SES antenna?
  • Highly directional parabolic antenna requiring stabilization. (0% chose this)
  • Omni-directional. (93% chose this)
  • Wide beam width in a cardioid pattern off the front of the antenna. (3% chose this)
  • Very narrow beam width straight-up from the top of the antenna. (3% chose this)
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Which of the following situations would normally use the Safety priority?
  • Important navigational or meteorological warnings. (93% chose this)
  • A serious medical situation involving a crewmember. (3% chose this)
  • An unanticipated warning related to piracy or terrorism. (0% chose this)
  • Grounding in a way that could lead to imminent danger to the ship’s crew. (3% chose this)
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Which of the following is a correctly formatted Inmarsat-C address book entry for sending communications to a shoreside TELEX terminal number 45992 in Taiwan (TELEX country code 769)?
  • 76945992+ (15% chose this)
  • None of these answers is correct. (85% chose this)
  • 769 45992+ (0% chose this)
  • (769)45992 (0% chose this)
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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 (0% chose this)
  • 4414248821902# (3% chose this)
  • 44+ 14248821902+ (0% chose this)
  • 4414248821902 (97% chose this)
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What action should be taken on changing from one Inmarsat-C ocean region to another?
  • Power the system down and turn the power back on again. (0% chose this)
  • Manually realign the antenna. (0% chose this)
  • Log out of the current satellite and log in to the correct satellite. (93% chose this)
  • No action is required -- the unit will scan for another satellite and log in. (7% chose this)
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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 (81% chose this)
  • (238)276992 (3% chose this)
  • 238276992# (8% chose this)
  • 238276992+ (8% chose this)
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Which of the following would indicate an F77 terminal?
  • 765044177 (83% chose this)
  • 0036648202 (6% chose this)
  • 436682433 (9% chose this)
  • 367224126 (3% chose this)
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What action should you take after sending a false or mistaken Distress alert on MF?
  • Send another DSC alert on 2187.5 kHz. and follow on with voice on 2187.5 kHz. (0% chose this)
  • No action is necessary. (3% chose this)
  • Make a voice announcement to cancel the alert on 2182.0 kHz. (88% chose this)
  • Send a DSC alert on all 7 DSC frequencies and follow on voice on 2174.5 kHz. (9% chose this)
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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. (83% chose this)
  • Send a "WRU" then a "Here is" when requested to do so by the coast station. (6% 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. (11% chose this)
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Which Inmarsat Earth stations would be available for Inmarsat-C traffic if the vessel is off the Atlantic Coast of the United States and tracking the AOR-E satellite?
  • Fucino (Italy), Nakhoda (Russia) or Haiphong (Vietnam). (3% chose this)
  • Santa Paula (USA), Beijing (P.R.C.), Sentosa (Singapore). (3% chose this)
  • Southbury (USA), Burum (Netherlands), or EIK (Norway). (91% chose this)
  • Haiphong (Vietnam), Burum (Netherlands), or EIK (Norway). (3% chose this)
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