单项选择题
Which of the following is the reason that the metacentric height is a valid measure of only the initial stabilit?（）.
A.The metacenter does not remain in the same position for large angles of inclination
B.The center of gravity shifts due to inclination
C.The center of gravity shifts above the metacenter as the vessel is inclined
D.The mean draft will change as the vessel is inclined
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单项选择题
A wind has caused a difference between drafts starboard and port. This difference is（）.
A.list
B.heel
C.trim
D.flotation -
单项选择题
Deballasting a double bottom has what affect on KG?（）.
A.KG is increased
B.KG is decreased
C.KG is not affected
D.KG increases at light drafts and decreases at deep drafts -
单项选择题
For a floating vessel，the center of buoyancy and the metacenter are in the line of action of the buoyant force（）.
A.only when there is positive stability
B.only when there is negative stability
C.only when there is neutral stability
D.at all times
