单项选择题
（）measured at the midship section and taken from outside of the ship’s side shell plating on one side to the outside of ship’side shell plating on the other side.
A.Length overall B.After perpendicular C.Amidships D.Extreme breadth
单项选择题 （）is a point midway between the forward and the after perpendicular.
单项选择题 （）length of the ship measured from extreme points of the ship forward and aft.
单项选择题 You should always wear（）when working on deck.
