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单选题
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


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