单选题For a floating vessel,true mean draft is always the（）.Aaverage of the observed draftsBdraft at the centre of flotationCdraft corresponding to the center of buoyancyDmetacentric height
单选题
For a floating vessel,true mean draft is always the（）.
A
average of the observed drafts
B
draft at the centre of flotation
C
draft corresponding to the center of buoyancy
D
metacentric height
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