How is “radio silence” imposed?（）<br>A:By the On Scene Coordinator (OSC)<br>B:By the Coast Earth Station (CES) controlling the distress communications on that frequency<br>C:It is imposed by the Public Correspondence Station (PCS) controlling the distress communications on that frequency or channel<br>D:It is imposed by the High Seas Service (HSS) controlling the distress communications on that frequency or channel

How is “radio silence” imposed?（）
A:By the On Scene Coordinator (OSC)
B:By the Coast Earth Station (CES) controlling the distress communications on that frequency
C:It is imposed by the Public Correspondence Station (PCS) controlling the distress communications on that frequency or channel
D:It is imposed by the High Seas Service (HSS) controlling the distress communications on that frequency or channel

出自：海船船员证

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