单项选择题
A.windlass B.steer C.propeller D.helm
The main body of a vessel is the （）.A.hullB.superstruct...
单项选择题The main body of a vessel is the （）.
A.hull B.superstructure C.engine room D.poop
Sailors should keep （）at sea.A.lookoutB.outlookC.uplook...
单项选择题Sailors should keep （）at sea.
A.lookout B.outlook C.uplook D.lookup
（）refers to the height from the waterline to the bottom...
单项选择题（）refers to the height from the waterline to the bottom of the ship.
A.Draft B.Freeboard C.Derrick D.Drift
