单项选择题
The principal purpose of adjustment of the magnetic compass is to eliminate（）as far as possible.
A.variation
B.compass error
C.deviation
D.earth‟s magnetic force
点击查看答案&解析
相关考题
-
单项选择题
You are standing the wheelwatch on entering port and the master gives you a rudder command which conflicts with a rudder command from the pilot.What should you do?（）
A.obey the master‟s
B.obey the pilot‟s
C.bring the rudder to a position midway between the two conflicting orders
D.ask the pilot if he relinquishes control -
单项选择题
（）is used for lifting cargo.
A.A mooring winch
B.A windlass
C.A deck crane
D.A lifeboat -
单项选择题
The original equilibrium position is stable when（）.
A.metacentric height is positive
B.metacentric radius is positive
C.KG exceed maximum allowable limits
D.Free surfaces are excessive
