单项选择题
When a vessel has positive stability，the distance between the line of force through B and the line of force through G is called the（）.
A.metacentric height B.righting arm C.righting moment D.metacentric radius
单项选择题 What will NOT decrease the stability of a vessel?（）
单项选择题 What is used as an indicator of initial stability? （）
单项选择题 What is the stability term for the distance from the center of gravity (G) to the Metacenter (M)，when small-angle stability applies? （）
