单项选择题

You hear the fog signal of another vessel forward of your beam.Risk of collision may exist.You MUST（）.

A.Reduce speed to bare steerageway
B.Stop your engines
C.Begin a radar plot
D.All of the above

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单项选择题

You are underway in reduced visibility.You hear the fog signal of another vessel about 20° on your starboard bow.Risk of collision may exist.You should（）.

A.alter course to starboard to pass around the other vessel
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You are underway and approaching a bend in the channel where vessels approaching from the opposite direction cannot be seen．You should sound（）.

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