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Subel. F
6 questions
Subelement F

Maritime Safety Information (M.S.I.):

Section 39

Navtex-3: Message Format:

The NAVTEX message header contains the following?

  • A two-digit number (01-99) indicates the NAVTEX message category.
  • Message numbers include a date/time group, along with the transmitting station's numerical ID.
  • Correct Answer
    The first letter (from A to Z) indicates the NAVTEX transmitting station.
  • None of these answers is correct.
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If the Inmarsat-C terminal is inoperative but the vessel remains within NAVTEX coverage -- which of the following message categories should not be disabled by the GMDSS Radio Operator?

  • Navigational warnings, meteorological warnings and metrological forecasts.
  • Search and Rescue information, navigational warnings and other electronic navaid messages.
  • Search and Rescue information, Meteorological warnings and ice reports.
  • Correct Answer
    Meteorological warnings, Search and Rescue information and Navigational warnings.
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How are NAVTEX broadcasts transmitted?

  • Correct Answer
    Using FEC techniques.
  • NAVTEX is transmitted by commercial coast radio stations following their traffic lists.
  • NAVTEX is transmitted only when an Urgency or Distress broadcast is warranted.
  • No more often than every two hours and should immediately follow the radiotelephone silent periods.
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What determines whether a NAVTEX receiver prints a particular type of message content from a programmed NAVTEX station?

  • The serial number and type of message have already been received but additional printouts are generated to ensure receipt aboard the vessel.
  • Correct Answer
    The serial number and type of message has not been previously received or the subject indicator has not been programmed for rejection.
  • The subject indicator has been programmed for rejection by the operator but the message contains a priority override print command.
  • The transmitting station ID covering your area has been programmed for rejection by the operator or has not been previously received.
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Which information determines if a NAVTEX message is to be rejected?

  • Transmitter identity (numerals from 1 to 26 identifying transmitting station within the NAVAREA).
  • Correct Answer
    The second letter (from A to Z) in the header indicating the type of message.
  • The Answerback of the receiving station has not been entered in the NAVTEX receiver.
  • Only messages having a serial number 00 are rejected.
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NAVTEX broadcasts are sent:

  • Immediately following traffic lists.
  • On request of maritime mobile stations.
  • Correct Answer
    In categories of messages indicated by a single letter or identifier.
  • Regularly, after the radiotelephone silent periods.
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