Which statement is true regarding the receipt and acknowledgement of actual Distress follow-on communications by GMDSS ship stations?

(C). A ship station that receives a Distress call from another vessel must, as soon as possible, inform the Master or person responsible for the ship of the contents of the Distress communications received.

47 CFR 80.1121(a) Ship or ship earth stations that receive a distress alert must, as soon as possible, inform the master or person responsible for the ship of the contents of the distress alert.

47 CFR 80.1121(b) Distress alert relays to “all ships” on these bands may only be sent by a ship who has knowledge that another ship in distress is not itself able to transmit the distress alert, and the Master of the ship considers that further help is necessary.

Please see at Code of Federal Regulations, Title 47 Chapter I Subchapter D Part 80 Subpart W Operating Procedures § 80.1121 Receipt and acknowledgement of distress alerts by ship stations and ship earth stations.

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What is meant by the acronym "EOS" in a DSC message?

(D). End Of Sequence

The “end of sequence” (EOS) character is sent with ARQ, automatic repeat request.

From Recommendation ITU-R M.493-15, Digital selective-calling system for use in the maritime mobile service

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What is the proper procedure to be followed upon receipt of a Distress alert transmitted by use of Digital Selective Calling techniques?

(A). Set watch on the radiotelephone Distress and Safety frequency associated with the Distress and Safety calling frequency on which the Distress alert was received.

The requirement is to be on the same frequency and monitor it for further information.

47 CFR 80.1123(b) While at sea, all ships must maintain radio watches for broadcasts of maritime safety information on the appropriate frequency or frequencies on which such information is broadcast for the area in which the ship is navigating.

Please see at Code of Federal Regulations, Title 47 Chapter I Subchapter D Part 80 Subpart W Operating Procedures § 80.1123 Watch requirements for ship stations.

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What is meant by the acronym "ECC" in a DSC message?

(B). Error Check Character

From Recommendation ITU-R M.493-15, Digital selective-calling system for use in the maritime mobile service

The error-check character (ECC) is the last character sent. It helps to catch and correct errors resulting from interference in transmission.

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What action should be taken on receipt of a DSC Distress alert?

(B). Silence the alarm, read the display screen and/or printout and listen for any follow on transmissions.

The other choices include steps that are not reasonable in this situation.

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What action should be taken if a Distress alert is received on the 12 MHz DSC frequency?

(C). Set the transceiver to 12290.0 kHz simplex J3E emission.

From VHF AND SSB RADIO CHANNELS, FREQUENCIES, AND HF FREQUENCY PROPAGATION PREDICTION CURVES

Class of Emission J3E is a duplex ships' transmit carrier frequency 12290.0 kHz.

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