单项选择题
In the absence of external forces,the center of buoyancy of an inclined vessel is vertically aligned directly below the().
A.center of gravity
B.amidships station
C.center of flotation
D.geometric center of the waterplane area
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A.a little deeper aft
B.a little deeper forward
C.at the same draught between fore and aft
D.a balance between two sides -
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A.increase the righting moment
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If the buoyant force on a ship’s hull is equal to the displacement tonnage,the ship will().
A.require ballast
B.be down by the head
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D.float
