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單項選擇題

The Coordinator Surface Search in a SAR situation should display by day（）.

A.the code flags FR
B.a black ball over a black diamond shape
C.code flag Quebec over a black ball
D.two black diamond shapes in a vertical line

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Some sea water came into the wheel house during the voyage due to（）the window thereof.

A.not close
B.not closing
C.we didn't close
D.not to be closed

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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

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