单项选择题
To improve your vessel’s stability in a hazardous situation，you should（）.
A.ballast deep tanks if they are slack B.transfer ballast athwartships C.pump out double bottoms D.fill double bottoms from deep tanks
单项选择题 To ensure the ship’s general stability，（）.
单项选择题 The vertical distance between G and M is used as a measure of（）.
单项选择题 The trim and stability booklet must be approved by the（）.
