单项选择题
A.did not appreciably change B.does not appreciably change C.do not appreciably change D.not appreciably change
The effectiveness of the action shall be carefully chec...
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
Sailing vessels are stand-on over power-driven vessels ...
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
Risk of collision is considered to exist if（）.A.four ve...
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
