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單項選擇題

A vessel’s bottom will be subjected to tension when weight is concentrated（）.

A.amidships
B.aft
C.at both ends of the vesel
D.forward

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單項選擇題

A vessel’s quarter is that section which is（）.

A.abeam
B.dead astern
C.just aft of the bow
D.on either side of the stern

單項選擇題

A V-shaped ripple with the point of the V pointing upstream in a river may indicate a（）.

A.submerged rock, not dangerous to navigation
B.sunken wreck, not dangerous to navigation
C.towed-under buoy
D.All of the above

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