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Subel. C
6 questions
Subelement C

DSC & Alpha-Numeric ID Systems:

Section 15

MMSI: Group & Coast Station I.D. Nrs:

A DSC call is received from a station with a MMSI number of 003669991. What type of station made the call?

  • A vessel operating in Sea Area A3.
  • A group ship station
  • Correct Answer
    A U.S. coast station
  • An Intercoastal vessel
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A valid MMSI number for a DSC call to a specific group of vessels is:

  • 003664523
  • 338462941
  • 003036483
  • Correct Answer
    030327931
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A MMSI 030346239 indicates what?

  • Correct Answer
    Group MMSI
  • Inmarsat-C I.D. number
  • Coast station
  • Ship station
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Which of the following statements concerning MMSI is true?

  • Coast station MMSI numbers have 9 digits starting with 4.
  • Correct Answer
    All MMSI numbers are 9 digits and contain an MID.
  • Ship station MMSI numbers can be 7 digits or 9 digits depending on the Inmarsat terminal.
  • Group MMSI numbers must begin with 2 zeros.
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Which of the following statements concerning MMSI is false?

  • All Coast Station MMSI must begin with 2 zeros.
  • Correct Answer
    All Coast Station MMSI must begin with the MID then 2 zeros.
  • A group call must begin with a single zero followed by the MID.
  • The first 3 digits of a ship MMSI comprise the MID.
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Which of the following statements concerning MMSI is true?

  • All ship station MMSI must begin with a single zero and include the MID.
  • All group station MMSI must begin with the MID.
  • Correct Answer
    None of these answers are correct.
  • All Coast Station MMSI must be 9 digits and begin with the MID and then two zeros.
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