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（）.
单项选择题 Owing to the big draft，the ship is not permitted to go alongside until the time of（）.
单项选择题 On the cargo manifest，the gross weight of a box containing cargo is the weight of the（）.
