單項(xiàng)選擇題

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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單項(xiàng)選擇題

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

單項(xiàng)選擇題

Reducing the liquid free surfaces in a vessel reduces the（）.

A.roll period
B.metacentric height
C.waterplane area
D.vessel's draft