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單項選擇題

If the officer on watch is in any doubt as to the pilot’s actions,or intentions,he should（）.

A.notify the captain as soon as possible
B.seek clarification from the pilot
C.take action by his own judgment
D.cease the duty of pilot's at once

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單項選擇題

If the result of loading a vessel is an increase in the height of the center of gravity,there will always be an increase in the（）.

A.metacentric height
B.righting arm
C.righting moment
D.vertical moment

單項選擇題

If the sling bumps（）the beams,serious accidents may follow.

A.at
B.on
C.into
D.against