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Subel. G
6 questions
Subelement G

VHF-DSC Equipment & Comms:

Section 48

VHF-DSC Calls: Routine and Ship-to-Ship:

How are Routine calls usually formatted/initiated?

  • By pressing the "Distress Hot Key".
  • Correct Answer
    By making the appropriate key strokes to select the appropriate menu choices.
  • By pressing the "Alarm" button and then selecting from various options.
  • Using Ch-70 to make Routine priority DSC calls is not permitted.
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What would be the appropriate menu choice when calling another ship station?

  • Ch-28
  • Duplex
  • Correct Answer
    Simplex
  • Ch-22
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What would be the appropriate channel selection for follow-on voice communications for a Routine priority call to another vessel?

  • Ch-70
  • Ch-16
  • Ch-22
  • Correct Answer
    Ch-08
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If the vessel you wish to call is not listed in your VHF address book, what action would not resolve the problem?

  • Correct Answer
    Look in the DSC Distress call data directory for the MMSI number of the other vessel.
  • The vessel's MMSI number could be manually entered during the call setup.
  • The vessel's name and MMSI number may be entered in the address book for use.
  • Look the number up in the ITU books and manually call the vessel.
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What conditions must exist for a completely automatic DSC acknowledgement of a Routine call and change to suggested working channel?

  • Both stations must be monitoring Ch-16 or the sending station must be set up for automatic DSC response.
  • The receiving station must be monitoring the suggested working frequency.
  • All routine priority DSC calls must be manually acknowledged by the watch officer.
  • Correct Answer
    The receiving station must be set up for automatic DSC response.
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What actions will take place upon receipt of a Routine call from another vessel if both vessels are programmed for automatic response and the ECC is no good?

  • Correct Answer
    Some portion of the call particulars will appear on the screen and the channel will not change.
  • The ECC alarm will sound and the watch officer should call back to determine the working frequency.
  • The ECC alarm will sound and the channel will change but the watch officer should ensure it is legal.
  • The channel will not change because the working frequency requested is illegal.
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