For a floating vessel，true mean draft is always the（）.<br>A:average of the observed drafts<br>B:draft at the center of flotation<br>C:draft corresponding to the calculated displacement<br>D:mean of the calculated drafts

For a floating vessel，true mean draft is always the（）.
A:average of the observed drafts
B:draft at the center of flotation
C:draft corresponding to the calculated displacement
D:mean of the calculated drafts

出自：海船船员证

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