单项选择题

The center of the underwater volume of a floating vessel is the（）.

A.center of buoyancy
B.center of flotation
C.uncorrected height of the center of gravity of the vessel
D.center of gravity of the vessel corrected for free surface effects

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单项选择题

The center of flotation of a vessel is（）.

A.the center of volume of the immersed portion of the vessel
B.the center of gravity of the water plane
C.that point at which all the vertical downward forces of weight are considered to be concentrated
D.that point at which all the vertical upward forces of buoyancy are considered to be concentrated

单项选择题

The center of buoyancy is located at the（）.

A.geometric center of the waterplane area
B.intersection of the vertical centerline and line of action of the buoyant force
C.center of gravity of the vessel corrected for free surface effects
D.geometric center of the displaced volume

单项选择题

The average of the forward and after drafts is the（）.

A.mean draft
B.true mean draft
C.mean of the calculated drafts
D.draft at the center of flotation