The volume of watertight spaces of a vessel above its waterline is the vessel’s（）.<br>A:free surface<br>B:marginal stability<br>C:reserve buoyancy<br>D:freeboard

The volume of watertight spaces of a vessel above its waterline is the vessel’s（）.
A:free surface
B:marginal stability
C:reserve buoyancy
D:freeboard

出自：海船船员证

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