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Subel. D
6 questions
Subelement D

Distress, Urgency & Safety Comms:

Section 20

Response to a Distress Alert:

Which statement is true regarding the receipt and acknowledgement of Distress alerts by ship stations?

  • Ship stations in receipt of a Distress alert should acknowledge it immediately to assist the coast station in responding to the Distress alert.
  • Correct Answer
    A ship station that receives a Distress alert must, as soon as possible, inform the Master or person responsible for the ship of the contents of the Distress alert.
  • Ship stations that receive a Distress alert from a vessel in their vicinity must immediately send a DSC relay to inform the RCC.
  • Alerts concerning navigational hazards are second only to Safety traffic.
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What is meant by the acronym "EOS" in a DSC message?

  • Error Of Sequence
  • End Of Signals
  • Correct Answer
    End Of Sequence
  • Equal Operating Signals
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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?

  • 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.
  • Correct Answer
    Set watch on the radiotelephone Distress and Safety frequency associated with the Distress and Safety calling frequency on which the Distress alert was received.
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What is meant by the acronym "ECC" in a DSC message?

  • Correct Answer
    Error Check Character
  • Every Cipher Counted
  • Error Cannot Confirm
  • Even Characters Counted
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What action should be taken on receipt of a VHF Distress alert?

  • Read the display screen and/or printout and call the Master to verify if the Distress is genuine.
  • Silence the alarm, examine the display screen and acknowledge the DSC alert via DSC.
  • Silence the alarm and listen for any follow on voice transmission on Ch-70.
  • Correct Answer
    Silence the alarm and set up watch on Ch-16 to determine if the Distress is genuine.
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What precautions should be taken when viewing an incoming DSC Distress alert message?

  • Correct Answer
    Be careful not to activate a DSC acknowledgement or relay.
  • If the message is not clear make a DSC call to all ships requesting clarification.
  • No precautions are necessary -- the unit will auto-acknowledge an incoming DSC Distress alert.
  • If there are errors in the call the unit didn't auto-acknowledge via DSC and the watch officer must do so instead.
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