單項選擇題When visibility is 20 nautical miles, we say that visibility is（）.
A.very good
B.good
C.poor
D.moderate
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1.單項選擇題Our ship has not been to shipyard for a long time, the fouling on the ship’s hull greatly decreases her（）.
A.resistance
B.weight
C.speed
D.displacement
2.單項選擇題Radar is not only to obtain（）,but also to measure their distance away from you.
A.brightness of obtain
B.color of targets
C.shape of targets
D.bearing of objects
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Before any loading takes place any signs of the previous cargo should do（）.
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The company should establish and maintain procedures to control all documents and date which are relevant to（）.
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The mean draft of a ship is the draft（）.
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（）is halfway between the forward and after perpendiculars and is reference point for vessel construction.
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Manoeuvring information can not be obtained from（）.
題型：單項選擇題