MF-HF Equip. and Comms:
MF-HF DSC Controller Call Programming:
Which of these is not a primary purpose of the MF/HF DSC controller?
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It provides for the electronic memory of incoming and outgoing DSC calls.
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It permits control of transceiver operations in response to an incoming DSC call.
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It provides for the formatting and transmission of outgoing DSC calls.
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Correct AnswerIt provides the scanning watch receiver capability on the 6 MF/HF DSC frequencies.
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A "Distress Hot Key" MF/HF DSC Distress alert:
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Correct AnswerWill be transmitted on 2187.5 kHz or another DSC frequency, depending on the manufacturer.
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Will always be transmitted on 2187.5 kHz and 8414.5 kHz to trip DSC alarms on the mandatory MF/HF DSC watch frequencies.
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Will always be transmitted on 2187.5 kHz first to alert the nearest vessels and coast stations.
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Will always be sent first on 16804.5 kHz to reach coast stations far away from the vessel.
(A). A "Distress Hot Key" MF/HF DSC Distress alert will be transmitted on 2187.5 kHz or another DSC frequency, depending on the manufacturer.
§ 80.304 Watch requirement during silence periods.
Each ship station operating on telephony on frequencies in the band 1605-3500 kHz must maintain a watch on the frequency 2182 kHz. This watch must be maintained at least twice each hour for 3 minutes commencing at x h.00 and x h.30 Coordinated Universal Time (UTC) using either a loudspeaker or headphone. Except for distress, urgency or safety messages, ship stations must not transmit during the silence periods on 2182 kHz.
Regarding 2,182 kHz see § 80.304
For a great reference on various topics, see the Title 47 Chapter I Subchapter D Part 80 - STATIONS IN THE MARITIME SERVICES on Code of Federal Regulations
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A Distress Priority DSC call may be formatted and transmitted specifying and requesting:
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Nature of Distress, vessel position, follow-on frequency, only voice follow-on communications.
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Correct AnswerNature 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.
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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
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Nature of Distress, vessel position, follow-on frequency, only TELEX follow-on communications.
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Which of these statements regarding a multi-frequency MF/HF DSC Distress alert is false?
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Some units transmit on the mandatory MF/HF DSC watch frequencies first, and then on the others.
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Some units transmit in ascending order of propagation radius to alert nearby ships or shore stations first.
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Correct AnswerMay be transmitted in any order programmed by the GMDSSS operator.
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Multi-frequency alerts work quite differently, depending on the manufacturer and require care and understanding of the feature.
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To make a call to another vessel requesting voice communications regarding important company business, the GMDSS operator should:
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Select Routine priority, enter other vessel's MMSI, specify legal alternate frequency, J2B emission and transmit the properly formatted DSC call.
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Select Routine priority, enter own vessel's MMSI, specify legal alternate frequency, J3E emission and transmit the properly formatted DSC call.
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Correct AnswerNone of these answers is correct.
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Select Urgency priority, enter other vessel's MMSI, specify legal alternate frequency, F1B emission and transmit the properly formatted DSC call.
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To make a call to another vessel requesting TELEX communications regarding important company business, the GMDSS operator should:
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Select Urgency priority, enter other vessel's MMSI, specify legal alternate frequency, F1B emission and transmit the properly formatted DSC call.
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Select Routine priority, enter own vessel's MMSI, specify legal alternate frequency, F1B emission and transmit the properly formatted DSC call.
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Select Routine priority, enter other vessel's SELCAL for TELEX specify legal alternate frequency, F1B emission and transmit the properly formatted DSC call.
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Correct AnswerSelect Routine priority, enter other vessel's MMSI, specify legal alternate frequency, F1B emission and transmit the properly formatted DSC call.
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