单项选择题
Reserve buoyancy is the（）.
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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相关考题
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单项选择题
Reserve buoyancy is（）.
A.also called GM
B.the void portion of the ship below the waterline which is enclosed and watertight
C.affected by the number of transverse watertight bulkheads
D.the watertight portion of a vessel above the waterline -
单项选择题
Reducing the liquid free surfaces in a vessel reduces the（）.
A.roll period
B.metacentric height
C.waterplane area
D.vessel's draft -
单项选择题
Owing to the big draft，the ship is not permitted to go alongside until the time of（）.
A.ebb tide
B.flood tide
C.spring tide
D.slack water
