Section-e: Distress, Urgency & Safety Communications: Key Topic #33: Action-False Distress Alert:

33E1 What action should you take after sending a false Distress alert on VHF?

A. Make a voice announcement to cancel the alert on Ch-16.

B. Send a DSC cancellation message on Ch-70.

C. Make a voice announcement to cancel the alert on Ch-13.

D. Make a voice announcement to cancel the alert on Ch-22A.

33E2 What action should you take after sending a false Distress alert on MF?

A. Make a voice announcement to cancel the alert on 2187.5 kHz.

B. Make a voice announcement to cancel the alert on 2182.0 kHz.

C. Make a voice announcement to cancel the alert on 2174.5 kHz.

D. Send another DSC alert and follow on with voice on 2182.0 kHz.

33E3 What action should you take after sending a false Distress alert on MF?

A. Send another DSC alert on 2187.5 kHz. and follow on with voice on 2187.5 kHz.

B. No action is necessary.

C. Make a voice announcement to cancel the alert on 2182.0 kHz.

D. Send a DSC alert on all 7 DSC frequencies and follow on voice on 2174.5 kHz.

33E4 What action should you take after sending a false Distress alert on 8 MHz?

A. Make an "ALL STATIONS” call on all 5 H.F. TELEX channels canceling the alert.

B. Make a "MAYDAY" call on 8414.5 kHz canceling the alert.

C. Make an "Urgency" call on 8614.0 kHz canceling the alert.

D. Make an "ALL STATIONS" call on 8291.0 kHz canceling the alert.

33E5 What action should you take after sending a false Distress alert on 12577.0 kHz?

A. Make an "ALL STATIONS” call on the associated 12 MHz J3E frequency canceling the alert.

B. No action is necessary.

C. Make an "ALL STATIONS” call on all 5 H.F. TELEX frequencies canceling the alert.

D. Send a message to the nearest RCC via Inmarsat canceling the alert.

33E6 What action should you take after sending a false or accidental Distress alert on Inmarsat-C?

A. Press the "Distress Hot Keys” then press the "cancel" key.

B. Select "Transmit" or “SEND/REC” menu and send a cancellation message via the LES used for the Distress alert.

C. Do nothing until the RCC contacts your vessel to determine if the Distress alert was genuine.

D. Select the cancel false Distress alert option in the Distress Setup Menu and re-transmit the call.

Answers: 33E1 - A 33E2 - B 33E3 - C 33E4 - D 33E5 - A 33E6 - B

Section-e: Distress, Urgency & Safety Communications: Key Topic #34: Radio Silence – Resume Traffic:

34E1 What is the fundamental purpose for imposing radio silence?

A. To ensure that interference to proprietary communications is minimized.

B. To ensure that only voice communications can be effected on the Distress frequency or channel.

C. To ensure that a Distressed vessel will have a "window" twice each hour for transmitting routine messages.

D. To mitigate the risk of interference on a frequency or channel being used for emergency communications.

34E2 When can routine communications be resumed when radio silence has been imposed?

A. 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.

B. After determining that the frequency or channel appears to be no longer in use.

C. After determining that geographic distance from the Distress situation will prohibit any other signal from interfering with emergency communications.

D. If, in the master's opinion, communications on that frequency will interfere with emergency communications.

34E3 What is meant by the term "Seelonce Mayday”?

A. Stations remaining off the air to safeguard proprietary information.

B. Stations not directly involved with the on-going Distress communications may not transmit on the Distress frequency or channel.

C. Two three-minute silent periods, at 15 and 45 minutes after the hour that provide a transmitting "window" for distressed vessels to transmit Distress alerts using J3E.

D. Communications on a Distress frequency or channel is banned for 24 hours following the cessation of the Distress traffic.

34E4 How is "radio silence" imposed?

A. By the Land Earth Station (LES) controlling the Distress communications on that frequency.

B. By the nearest Public Correspondence Coast Station.

C. By the On Scene Coordinator (OSC) or the RCC chosen by the SAR Mission Coordinator.

D. By the vessel first responding to the Distress call.

34E5 How are normal working conditions restored on a SITOR (NBDP) frequency on which radio silence had been imposed?

A. The LES that imposed the radio silence must transmit a SITOR (NBDP) message stating "SILENCE FINI".

B. The Public Correspondence Station (PCS) that imposed the radio silence must transmit a narrow band direct printing message on the Distress frequency stating "SILENCE FINI".

C. The RCC or Coast station that imposed the radio silence must transmit a SITOR (NBDP) message stating "SILENCE FINI".

D. The High Seas Service (HSS) that imposed the radio silence must transmit a narrow band direct printing message on the Distress frequency stating "SILENCE FINI".

34E6 How are normal working conditions restored after radio silence has been imposed?

A. All of these answers are correct.

B. The Land Earth Station (LES) that imposed the radio silence must transmit a voice message on the Distress frequency stating "SILENCE FINI".

C. The Public Correspondence Station (PCS) that imposed the radio silence must transmit a voice message on the Distress frequency stating "SILENCE FINI".

D. The Rescue Coordination Center (RCC) that imposed the radio silence must transmit a voice message on the Distress frequency stating "SEELONCE FEENEE".

Answers: 34E1 - D 34E2 - A 34E3 - B 34E4 - C 34E5 - C 34E6 - D