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單項選擇題

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

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

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單項選擇題

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

單項選擇題

On the cargo manifest，the gross weight of a box containing cargo is the weight of the（）.

A.cargo
B.box
C.cargo and box
D.rate weight