GMDSS. FCC Test 48 – Online Maritime Tests

For general communications purposes, simplex frequencies are:

An ITU duplex channel frequency is defined as:

Transmit and receive frequencies must be identical.
Transmit and receive frequencies may be different, depending on whether communications are ship-shore or ship to ship.
Transmit and receive frequencies must be different.
Transmit and receive frequencies may be different, depending on whether communications are ship-shore or ship to ship.

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.
None of the above.
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.

To set-up the MF/HF Transceiver for a telex call to a coast station, the operator must:

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

Depending on the manufacturer, either a
ITU channels must be recalled from a database or memory.
Transmit and receive frequencies may be manually entered from the keypad.
All consoles allow both manual keypad entry and ITU channel recall from a database.

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

How are paired NBDP frequencies normally used?

These are normally used only for distress communications to limit channel interference.
These are normally used for FEC communications with coast radio stations.
These are normally used for DSC communications with coast radio stations.
These are normally used for ARQ communications with coast radio stations.

An ITU simplex channel frequency assignment is defined as:

Transmit and receive frequencies are different regardless of emission mode.
Transmit and receive frequencies may be different, depending on whether communications are ship-shore or ship to ship.
Transmit and receive frequencies must be identical.
Transmit and receive frequencies must be different.

For general communications purposes, paired frequencies are:

How are paired SSB frequencies normally used?

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