单项选择题
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
Power-driven vessels must keep out of the way of sailin...
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
