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
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相关考题
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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 -
单项选择题
Risk of collision is considered to exist if（）.
A.four vessels are nearby
B.a vessel has a steady bearing at a constant range
C.there is any doubt that a risk of collision exists
D.a special circumstance situation is apparent -
单项选择题
Power-driven vessels must keep out of the way of sailing vessels except（）.
A.in a crossing situation
B.when they are making more speed than the power-driven vessel
C.when the sailing vessel is overtaking
D.on the Inland Waters of the United States
