單項(xiàng)選擇題In a river subject to tidal currents，the best time to dock a ship without the assistance of tugs is（）.

A.at high water
B.when there is a following current
C.at slack water
D.at flood


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1.單項(xiàng)選擇題If your vessel is dragging her anchor in a strong wind，you should（）.

A.shorten the scope of anchor cable
B.increase the scope of anchor cable
C.put over the sea anchor
D.put over a stern anchor

2.單項(xiàng)選擇題If you were being assisted by an icebreaker and he sent you the single letter Q，he would be telling you（）.

A.that he has his engines in reverse
B.that he is shortening the distance between vessels
C.to shorten the distance between vessels
D.that his vessel is healthy

3.單項(xiàng)選擇題If you wear extra clothing when entering the water after abandoning ship it will（）.

A.weigh you down
B.preserve body heat
C.reduce your body heat
D.make it more difficult to breathe

4.單項(xiàng)選擇題If you shorten the scope of anchor cable，your anchor’s holding power（）.

A.decreases
B.increases
C.remains the same
D.has no relation to the scope

5.單項(xiàng)選擇題If you saw flames aboard a vessel but could see the vessel was not on fire，you would know that the（）.

A.crew was trying to get warm
B.vessel required immediate assistance
C.vessel was attempting to attract the attention of a pilot boat
D.vessel was being illuminated for identification by aircraft