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Subel. F
6 questions
Subelement F

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

Section 38

Navtex-2: Programming:

How is a NAVTEX receiver programmed to reject certain messages?

  • The transmitting station's two-digit identification can be entered to de-select reception of its broadcasts.
  • By entering the SELCAL of the NAVTEX transmitting station.
  • By pressing "00" in the transmitter's ID block.
  • Correct Answer
    By choosing a message category's single letter (A-Z) identifier and then deselecting or deactivating.
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How can reception of certain NAVTEX broadcasts be prevented?

  • Correct Answer
    The receiver can be programmed to reject certain stations and message categories.
  • Stations are limited to daytime operation only.
  • Coordinating reception with published broadcast schedules.
  • Automatic receiver desensitization during night hours.
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Which of the following statements is true?

  • No NAVTEX receiver can be programmed to reject category A, B, D and L messages since they are mandatory to be received via NAVTEX.
  • Correct Answer
    A GMDSS Radio Operator may choose to program certain NAVTEX receivers to reject category A, B, D and L messages if they are being received by another MSI system.
  • Upon entering a new NAVTEX station's broadcast range, the GMDSS Radio Operator enters the station's SELCAL number.
  • The GMDSS Radio Operator can select the "None" option in the message category menu.
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What means are used to prevent the reception of unwanted broadcasts by vessels utilizing the NAVTEX system?

  • Operating the receiver only during daytime hours.
  • Coordinating reception with published broadcast schedules.
  • Correct Answer
    Programming the receiver to reject certain stations and message categories.
  • Automatic receiver de-sensitization during night hours.
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What statement is true regarding the control the operator can exercise over the NAVTEX receiver's operation?

  • The operator can set the unit to automatically reject any and all categories of messages if the ship desires to not receive them.
  • Upon entering a coastal area for the first time, the operator enters code KK to indicate "ready to receive NAVTEX".
  • Correct Answer
    The operator can set most units to reject all messages except navigation, meteorological warnings, and search and rescue messages. If the unit will reject such messages it may be unsafe to do so.
  • To reduce the number of messages, the operator can select code 00 to indicate "not in coastal passage".
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Which messages are mandatory to be received and should not typically be rejected or disabled by the operator of a NAVTEX receiver?

  • Meteorological warnings, SAR information, Pilot Service Messages.
  • Meteorological warnings, meteorological forecasts, navigational warnings.
  • SAR information, navigational warnings, ice reports.
  • Correct Answer
    Navigational warnings, meteorological warnings, SAR information.
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