7-A-031: Response to a Distress Alert
7-31E1:
Which statement is true regarding the receipt and acknowledgement of actual Distress follow-on communications by GMDSS ship stations?
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.
Ship stations in receipt of Distress alert should not defer acknowledgement for a short interval, so that receipt may be acknowledged by the coast station.
A Coast station has the sole obligation to respond. A ship station should wait for the Coast station MMSI DSC Acknowledgement before taking action. If a Coast station has no response in 15 minutes the ship should DSC acknowledge and inform the RCC.
Alerts concerning navigational hazards are second only to Safety traffic.
7-31E2:
What is meant by the acronym "EOS" in a DSC message?
End of Sequence
Error Of Sequence
End Of Signals
Equal Operating Signals
7-31E3:
What is the proper procedure to be followed upon receipt of a Distress alert transmitted by use of Digital Selective Calling techniques?
Set watch on the radiotelephone Distress and Safety frequency associated with the Distress and Safety calling frequency on which the Distress alert was received.
Set watch on the DSC alerting frequency in the band of frequencies the alert was received.
Set a continuous watch on VHF-FM Channel 13, 16 and DSC on Channel 70.
Ship stations equipped with narrow-band direct-printing equipment should respond to the Distress alert as soon as practicable by this means.
7-31E4:
What is meant by the acronym "ECC" indicate in a DSC message?
Error Check Character
Every Cipher Counted
Error Cannot Confirm
Even Characters Counted
7-31E5:
What action should be taken on receipt of a DSC Distress alert?
Silence the alarm, read the display screen and/or printout and listen for any follow on transmissions.
Read the display screen and/or printout, silence the alarm, always call the Master to confirm the alert is real.
Listen for any follow on voice/TELEX transmission on the appropriate DSC frequency.
Silence the alarm, read the display screen and/or printout, only call the Master if the alert is within 500 NM.
7-31E6:
What action should be taken if a Distress alert is received on the 12 MHz DSC frequency?
Set the transceiver to 12290.0 kHz simplex J3E emission.
Use DSC to acknowledge/relay the alert using the 12 MHz DSC frequency.
Do nothing. Ship is too far away to render assistance.
Set the transceiver to 12520.0 kHz simplex F1B/J2B emission.
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● = Unseen
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● = Weak
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● = Review
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● = Learned
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● = Incorrect answer
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