单项选择题
A.sagging with tensile stress on main deck
B.sagging with compressive stress on main deck
C.hogging with tensile stress on main deck
D.hogging with compressive stress on main deck
单项选择题 Your vessel is going from a warm climate to a cold climate with a hygroscopic cargo. Which statement is true?（）.
单项选择题 Your vessel is listening 4°to port and has a short rolling period. There is loose firefighting water in the hull. The ship is trimmed down by th end with one foot of freeboard at the bow. Which action should you take first?（）
单项选择题 Your vessel is listening because of a negative GM. To lower G below M, you should（）.