单项选择题

If a vessel takes a sudden，severe list or trim from an unknown cause，you should FIRST（）.

A.determine the cause before taking countermeasures
B.assume the shift is due to off-center loading
C.counterflood
D.assume the cause is environmental forces

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单项选择题

If a vessel lists to port，the center of buoyancy will（）.

A.move to port
B.move to starboard
C.move directly down
D.stay in the same position

单项选择题

Horizontal transverse motion of a vessel is known as（）.

A.pitch
B.surge
C.sway
D.heave