（）refers to the depth of a vessel below the waterline，measured vertically to the lowest part of the hull，propellers or other reference points.<br>A:Free board<br>B:Stability height<br>C:Metacentric height<br>D:Draft

（）refers to the depth of a vessel below the waterline，measured vertically to the lowest part of the hull，propellers or other reference points.
A:Free board
B:Stability height
C:Metacentric height
D:Draft

出自：海船船员证

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