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Subel. C
6 questions
Subelement C

DSC & Alpha-Numeric ID Systems:

Section 17

DSC Operations:

A Ch-70 DSC Distress alert is received. What action should be taken?

  • Correct Answer
    Silence the alarm, review the message and set up watch on Ch-16 to listen for Mayday communications.
  • Silence the alarm and immediately call the master for further instructions.
  • Review the incoming message information but take no action unless requested to do so by the RCC.
  • Use DSC to immediately notify the vessel their Distress has been received.
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Which of the following statements on DSC acknowledgement and relay of DSC Distress alerts is true?

  • Operators cannot initiate acknowledgements or relays.
  • Correct Answer
    Most equipment was designed to allow for DSC acknowledgements and ALL SHIPS DSC relays but this should only be done per current regulations.
  • The equipment was designed to allow for DSC acknowledgements and relays and the operator should follow the software menu structure accordingly.
  • DSC acknowledgements and relays are automatically transmitted by the unit to ensure the RCC receives the Distress.
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What does the DSC control unit do if the GMDSS Radio Operator fails to insert updated information when initiating a DSC Distress alert?

  • It will abort the transmission and set off an audible alarm that must be manually reset.
  • It will initiate the DSC Distress alert but, as no information will be transmitted, rescue personnel will not be able to identify the vessel, its position, or its situation.
  • Correct Answer
    It will initiate the DSC Distress alert and default information will automatically be transmitted.
  • It will initiate the DSC Distress alert, but any station receiving it will have to establish contact with the distressed vessel to determine its identity, position, and situation.
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A DSC Distress alert is received. What action should be taken?

  • Transmit a DSC acknowledgement.
  • Call the nearest Coast Guard Station.
  • No action is necessary.
  • Correct Answer
    Advise the Master and monitor Ch-16.
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What is the quickest method of transmitting a DSC Distress alert?

  • Correct Answer
    Press the "Distress Hot Key".
  • Make a "MAYDAY" call on Ch-70.
  • Make a "MAYDAY" call on Ch-16.
  • Select "Distress" priority from the menu.
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DSC relays of Distress alerts by vessels:

  • Should be done for all Distress alerts received aboard the ship.
  • Correct Answer
    Should be avoided; unless an acknowledgement has not been heard.
  • Should be transmitted to all ships involved in Distress traffic.
  • Are the best means to provide for a retransmission of Distress communications.
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