单项选择题

The risk of collision shall be deemed to exist if the compass bearing of an approaching vessel （）.

A.did not appreciably change
B.does not appreciably change
C.do not appreciably change
D.not appreciably change

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单项选择题
The effectiveness of the action shall be carefully checked until the other vessel is finally （）.

A.past
B.clear
C.past or clear
D.past and clear
单项选择题
Sailing vessels are stand-on over power-driven vessels except（）.

A.in a crossing situation
B.in a meeting situation
C.when they are the overtaking vessel
D.on the inland waters of the PR China
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