单项选择题
A.have someone standing by B.make sure there is sufficient air within the locker C.de-energize the windlass D.All of the above
According（）the report，the ship hit the wharf when berth...
单项选择题According（）the report，the ship hit the wharf when berthing.
A.of B.to C.for D.on
A vessel showing a yellow light over a white light at n...
单项选择题A vessel showing a yellow light over a white light at night is a vessel（）.
A.engaged in piloting B.towing astern C.engaged in fishing D.in distress
A message warning of a tropical storm should be sent as...
单项选择题A message warning of a tropical storm should be sent as a(n)（）.
A.routine message B.urgent message C.distress message D.safety message
