单项选择题
If the cause of severe list or trim is off-center ballast，counterflooding into empty tanks will（）.
A.increase the righting moment B.increase the righting arm C.increase list or trim D.decrease list or trim
单项选择题 If the buoyant force on a ship’s hull is equal to the displacement tonnage，the ship will（）.
单项选择题 For an upright vessel，draft is the vertical distance between the keel and the（）.
单项选择题 For a floating vessel，true mean draft is always the（）.
