Element 7: GMDSS Radio Operating Practices

effective 8/01/2006

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7-A-079: MF-HF: Controls: Volume, Squelch, Power, Frequency & Mode

7-79I1: Which modes could be selected to receive vessel traffic lists from high seas shore stations:

SSB and FEC

AM and VHF-FM

ARQ and FEC

VHF-FM and SSB



7-79I2: MF/HF Transceiver Power levels should be set:

To the lowest level necessary for effective communications.

To the level necessary to maximize the propagation radius.

To the highest level possible so as to ensure other stations cannot "break-in" on the channel during use.

Both a) and c)



7-79I3: Which statement regarding GMDSS MF/HF Transceiver frequency set-up is true:

Depending on the manufacturer, either a) or b) could be true.

Transmit and receive frequencies may be manually entered from the keypad.

ITU channels must be recalled from a database or memory.

All consoles allow both manual keypad entry and ITU channel recall from a database.



7-79I4: Which statement regarding GMDSS MF/HF Transceiver frequency set-up is true:

Some consoles allow both manual keypad entry and ITU channel recall from a database or memory, while others do not.

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.

None of the above



7-79I5: To set-up the MF/HF Transceiver for a TELEX call to a coast station, the operator must:

Select F1B mode or J2B mode, depending on the equipment manufacturer.

Select J3E mode for proper SITOR operations.

Select F1B/J2B modes or J3E mode, depending on whether ARQ or FEC is preferred.

None of the above



7-79I6: To set-up the MF/HF Transceiver for a voice call to a coast station, the operator must:

Select J3E mode for proper voice operations.

Select J3E mode for proper SITOR 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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7-A-078: INMARSAT Equipment Faults and Maintenance-2
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Element 7: GMDSS Radio Operating Practices
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7-A-080: MF-HF: Frequencies: Simplex, Duplex & Half-duplex