GMDSS. FCC Test 20 – Online Maritime Tests

What is the fundamental purpose for imposing radio silence?

To ensure that interference on a particular frequency or channel for communications concerning emergency traffic is minimized.
To ensure that only voice communications can be effected on the distress frequency or channel.
To ensure that interference to proprietary communications is minimized.
To ensure that a distressed vessel will have a 'window' twice each hour for transmitting routine messages.

Transmission of a distress alert by a station not in itself in distress should occur:

When the Master or responsible person on the mobile unit not in distress so decides.
When the responsible person at the Coast Station determines further help is necessary.
In some cases, all of the preceding situations may justify a Distress Alert relay.
When the mobile unit actually in distress is not itself in a position to transmit the distress alert.

What action should you take after sending a false distress alert on MF?

What action should you take after sending a false distress alert on 8 MHz?

What action should you take after sending a false distress alert on MF?

What action should you take after sending a false distress alert on VHF?

What action should you take after sending a false distress alert on 12577.0 kHz?

No action is necessary.
Make an 'ALL SHIPS' call on the associated 12 MHz J3E frequency canceling the alert.
Send a message to the nearest RCC via Inmarsat canceling the alert.
Make an 'ALL SHIPS' call on all 5 H.F. telex frequencies canceling the alert.

What action should you take after sending a false distress alert on Inmarsat-C?

None of the above.
Press the 'Distress Hot Keys? then press the 'cancel' key.
Select 'Transmit' menu and send a cancel message via the CES used for the distress alert.
Both of the above.

Relays of Distress Alerts using DSC may still be done. However, it is now recommended that such relays be done:

By any of the above methods which will effectively provide Distress communications to an RCC or Coast station without further activations of other Mobile Units' DSC controllers.
Only by Inmarsat-A voice or telex with Distress priority.
Only by Inmarsat-C telex with Distress Priority.
Preferably by MF/HF voice or telex directly to the RCC.

When can routine communications be resumed when radio silence has been imposed?

If, in the master's opinion, communications on that frequency will interfere with emergency communications.
After determining that the frequency or channel appears to be no longer in use.
After determining that geographic distance from the distress situation will prohibit any other signal from interfering with emergency communications.
Routine communications can resume after the Rescue Coordination Center transmits a message on the frequency or channel being used for emergency communications stating that such traffic has concluded.

Review Answers