单项选择题
A.Steady B.Meet her C.Midships D.Stop engines
（）means check the swing of the vessel’s head in a turn....
单项选择题（）means check the swing of the vessel’s head in a turn.
1 nautical mile is the lenth of an arc of a great circl...
单项选择题1 nautical mile is the lenth of an arc of a great circle which subtends an angel of（）at the center of the Earth.
A.1degree B.1 minute C.1second D.1.5 degree
A ship is side to be（）when the whole ship moves bodily ...
单项选择题A ship is side to be（）when the whole ship moves bodily to port and then to starboard.
A.rolling B.pitching C.heaving D.swaying
