GMDSS. FCC Test 51 – Online Maritime Tests

Through which coast radio station(s) may a U.S.-flag merchant vessel communicate?

Any coast radio station in the world that is licensed to provide such communications, but prior authorization must be obtained for a U.S.-flag merchant vessel to communicate through a non-U.S. station.
Any coast radio station in the world that is licensed to provide such communications.
Any coast radio station in the world that has been commissioned to provide such communications.
The U.S. Coast Guard coordinates the communications and assigns the working channel.

What is the correct procedure for calling a coast radio station using HF radiotelephone?

Request the VTS operator place the call on channel 22A.
Contact the nearest U.S.C.G. station to add the desired ship's call sign to the station's traffic list.
On a properly selected ITU channel, give the name of the coast radio station being called three times, and the words 'this is' followed by the name of the ship initiating the call three times, and concluding with 'over'.
On a properly selected ITU channel, give the call sign of the coast radio station being called three times using the ICAO alphabet, and the words 'this is' followed by the call sign of the ship initiating the call three times, using the ICAO alphabet, and concluding with 'over'.

A multi-frequency MF/HF DSC Distress Alert:

Must be transmitted in ascending order of propagation radius to alert nearby ships first.
May be transmitted on the mandatory MF/HF DSC watch frequencies first, and then on the others.
May be transmitted in any order programmed by the GMDSSS operator.
Either a

What is the best procedure for calling another ship station using HF radiotelephone when the signals are weak but readable?

Notify the local vessel traffic service control station of your intention to contact a specific vessel, and request the VTS operator place the call on channel 22A.
On a properly selected ITU channel, give the call sign of the ship being called three times using the ICAO alphabet, and the words 'this is' followed by the call sign of the ship initiating the call three times, using the ICAO alphabet, and concluding with 'over.'
Instruct the nearest public correspondence station to add the desired ship's call sign to the station's traffic list.
Give the name of the ship being called three times, and the words 'this is' followed by the name of the ship initiating the call three times, and concluding with 'over.'

The purpose of the MF/HF DSC controller is?

Both a
Permitting control of transceiver operations via an interface.
Providing the scanning watch receiver capability on the 6 MF/HF DSC frequencies.
Providing for the formatting and transmission of outgoing DSC calls.

What is the best source of information to find changes or additions to the routine communications frequencies of a Commercial Radio Station?

To make a call to another vessel requesting telex communications regarding important company business, the GMDSS operator should:

Select Routine priority, enter other vessel's MMSI, specify legal alternate frequency, F1B emission and transmit the properly formatted DSC call.
Select Urgent priority, enter other vessel's MMSI, specify legal alternate frequency, F1B emission and transmit the properly formatted DSC call.
Select Routine priority, enter other vessel's SelCall for telex specify legal alternate frequency, F1B emission and transmit the properly formatted DSC call.
Select Routine priority, enter own vessel's MMSI, specify legal alternate frequency, F1B emission and transmit the properly formatted DSC call.

A Distress Priority DSC call may be formatted and transmitted specifying and requesting:

Nature of Distress or alternate frequency but not both in a single call, vessel position or alternate frequency/emission but not both in a single call, voice or telex follow-up communications.
Nature of Distress or alternate frequency but not both in a single call, vessel position or alternate frequency/emission but not both in a single call, only telex follow-up communications
Nature of Distress, vessel position, follow-on frequency, only voice follow-on communications.
Nature of Distress, vessel position, follow-on frequency, only telex follow-on communications.

To make a call to another vessel requesting voice communications regarding important company business, the GMDSS operator should:

Select Routine priority, enter other vessel's MMSI, specify legal alternate frequency, J2B emission and transmit the properly formatted DSC call.
Select Urgent priority, enter other vessel's MMSI, specify legal alternate frequency, F1B emission and transmit the properly formatted DSC call.
None of the above.
Select Routine priority, enter own vessel's MMSI, specify legal alternate frequency, J3E emission and transmit the properly formatted DSC call.

A 'Distress Hot Key' MF/HF DSC Distress Alert:

None of the above.
Must go out on 2187.5 kHz and 8414.5 kHz to trip DSC alarms on the mandatory MF/HF DSC watch frequencies.
Must go out on 2187.5 kHz to alert the nearest vessels and coast stations.
May go out on 2187.5 kHz or may go out on another DSC frequency, depending on the manufacturer.

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