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
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A.mean draft
B.true mean draft
C.mean of the calculated drafts
D.draft at the center of flotation
A.trim
B.yaw
C.heel
D.loll
A.lighter／large
B.light／larger
C.lighter／larger
D.light／large
A.be pooped
B.pitchpole
C.broach
D.squat
A.unoccupied space below the waterline
B.volume of intact space above the waterline
C.excess of the buoyant force over the gravity force
D.difference in the buoyant force in salt and fresh waters
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The controlling depth of the river is（）.
Reducing the liquid free surfaces in a vessel reduces the（）.
Owing to the big draft，the ship is not permitted to go alongside until the time of（）.
The center of the underwater volume of a floating vessel is the（）.
The center of volume of the immersed portion of the hull is called the（）.
After transferring a weight forward on a vessel，the draft at the center of flotation will（）.
Although KG for a ship in lightweight is relatively high，the vessel is stiff because（）.
In the absence of external forces，the center of buoyancy of an inclined vessel is vertically aligned directly below the（）.
The center of buoyancy is located at the（）.
For a floating vessel，true mean draft is always the（）.