What is meant by the term “radio silence”?（）<br>A:Stations not directly involved with the on-going distress communications may not transmit on the distress frequency or channel<br>B:Stations remaining off the air to safeguard proprietary information<br>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<br>D:Communications on a distress frequency or channel is banned for 24 hours following the cessation of the distress traffic

What is meant by the term “radio silence”?（）
A:Stations not directly involved with the on-going distress communications may not transmit on the distress frequency or channel
B:Stations remaining off the air to safeguard proprietary information
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

出自：海船船员证

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