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Subelement J
MF-HF Equip. and Comms:
Section 80
MF-HF Panel Controls:
Which modes could be selected to receive vessel traffic lists from high seas coast radio stations:
  • AM and VHF-FM
  • Correct Answer
    SSB and FEC
  • ARQ and FEC
  • VHF-FM and SSB
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MF/HF Transceiver Power levels should be set:
  • To the highest possible level to ensure effective communications.
  • To the lowest possible level at all times regardless of whether communications are effective.
  • Correct Answer
    To the lowest level needed to achieve the necessary propagation radius and communications range.
  • To the highest level possible so as to ensure other stations cannot "break-in" on the channel during use.
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Which statement regarding GMDSS MF/HF Transceiver frequency set-up is true:
  • Manual keypad entries are quicker and more certain than using the database.
  • All consoles ensure that manual keypad entries are checked for legal outcomes.
  • All consoles ensure that ITU channel recall from a database produces accurate and legal outcomes.
  • Correct Answer
    Using the manufacturer's database typically produces a more swift and certain result.
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Which statement regarding GMDSS MF/HF Transceiver frequency set-up is true:
  • Correct Answer
    Some consoles allow both manual keypad entry and ITU channel recall from a database or memory.
  • Transmit and receive frequencies must always be manually entered from the keypad.
  • Transmit and receive frequencies must always be recalled from a database or memory.
  • Frequencies in the manufacturer's databases are always accurate and legal for use.
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To set-up the MF/HF Transceiver for a TELEX call to a coast station, the operator must:
  • Select J3E mode for proper SITOR (NBDP) operations.
  • Select F1B/J2B modes or J3E mode, depending on whether ARQ or FEC is preferred.
  • Select J3E mode for ARQ and H3E mode for FEC.
  • Correct Answer
    Select F1B mode or J2B mode, depending on the equipment manufacturer.
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To set-up the MF/HF Transceiver for a voice call to a coast station, the operator must:
  • Correct Answer
    Select J3E mode for proper voice operations.
  • Select J3E mode for proper SITOR (NBDP) operations.
  • Select F1B mode or J2B mode, depending on the equipment manufacturer.
  • Select F1B/J2B modes or J3E mode, depending on whether FEC or ARQ is preferred.
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