单项选择题
A.transverse moment B.vertical moment C.righting moment D.inclining moment
On a semisubmersible ship，reserve buoyancy is increased...
单项选择题On a semisubmersible ship，reserve buoyancy is increased by the presence of void spaces above the waterline in the（）.
A.submerged hulls B.quarters C.columns and upper structure D.submerged connecting structures
My drafts are 28 feet（）and 29 feet aft.A.foreB.advanceC...
单项选择题My drafts are 28 feet（）and 29 feet aft.
A.fore B.advance C.before D.beforehand
Keeping the draft at or below the load line mark will i...
单项选择题Keeping the draft at or below the load line mark will insure that the vessel has adequate（）.
A.ballast B.reserve buoyancy C.displacement D.rolling periods
