The Public Correspondence Station (PCS) that imposed the radio silence must transmit a voice message on the Distress frequency stating "SILENCE FINI".ħ-A-033: Action to take after sending a false distress alertĮlement 7: GMDSS Radio Operating Practices The Land Earth Station (CES) that imposed the radio silence must transmit a voice message on the Distress frequency stating "SILENCE FINI". The Rescue Coordination Center (RCC) that imposed the radio silence must transmit a voice message on the Distress frequency stating "SEELONCE FEENEE". How are normal working conditions restored after radio silence has been imposed?
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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". 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". The LES that imposed the radio silence must transmit a SITOR (NBDP) message stating "SILENCE FINI". The RCC or Coast station that imposed the radio silence must transmit a SITOR (NBDP) message stating "SILENCE FINI". How are normal working conditions restored on a SITOR (NBDP) frequency on which radio silence had been imposed? 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.Ĭommunications on a Distress frequency or channel is banned for 24 hours following the cessation of the Distress traffic.īy the On Scene Coordinator (OSC) or the RCC chosen by the SAR Mission Coordinator.īy the Land Earth Station (LES) controlling the Distress communications on that frequency.īy the nearest Public Correspondence Coast Station.īy the vessel first responding to the Distress call. Stations remaining off the air to safeguard proprietary information. Stations not directly involved with the on-going Distress communications may not transmit on the Distress frequency or channel. What is meant by the term "Seelonce Mayday"? If, in the master's opinion, communications on that frequency will interfere 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.Īfter determining that the frequency or channel appears to be no longer in use.Īfter determining that geographic distance from the Distress situation will prohibit any other signal from interfering with emergency communications. When can routine communications be resumed when radio silence has been imposed? To ensure that a Distressed vessel will have a "window" twice each hour for transmitting routine messages. 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 mitigate the risk of interference on a frequency or channel being used for emergency communications. What is the fundamental purpose for imposing radio silence?
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Radio silence & resumption of normal trafficĮlement 7: GMDSS Radio Operating Practices effective ħ-A-034: Radio silence & resumption of normal traffic