单项选择题
A.change course twenty degrees to the left B.put the rudder left twenty degrees C.put the rudder hard left for the first twenty degrees of swing D.put the rudder left twenty degrees and then ease back as the vessel starts swinging
The circulation around a low pressure center in the Nor...
单项选择题The circulation around a low pressure center in the Northern Hemisphere is（）.
A.counterclockwise B.variable C.clockwise D.anticyclonic
How long are you prohibited to consume alcohol prior to...
单项选择题How long are you prohibited to consume alcohol prior to serving as a member of a watch?（）
A.within two hours B.within three hours C.within four hours D.within five hours
It is dangerous for vessels without the operational rad...
单项选择题It is dangerous for vessels without the operational radar（）the estuary.
A.to get B.to approach C.to proceed D.to close
