單項選擇題An ocean tow is sinking in deep water. Attempts to sever the towing hawser are unsuccessful. Which action should now be taken? （）

A.Abandon the towing vessel
B.Radio for emergency assistance
C.Slip the towline and allow it to run off the drum
D.Secure all watertight openings on the towing vessel


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1.單項選擇題A wedge of water building up between the bow and nearer bank which forces the bow out and away describes（）.

A.bank cushion
B.bank suction
C.combined effect
D.bend effect

2.單項選擇題A vessel must proceed at a safe speed（）.

A.in restricted visibility
B.in congested waters
C.during darkness
D.at all times

3.單項選擇題A vessel is proceeding from a very cold climate to a warm climate.With a cargo of non-hygroscopic nature，which of the following is correct?（）.

A.There is danger of heavy cargo sweat if outside air is introduced by ventilation
B.Danger of the ship sweat exists.Constant and vigorous ventilation is required
C.There is little danger of ship's sweat;slight possibility of cargo sweat
D.The possibility of any ship or cargo sweat is remote

4.單項選擇題A tug would NOT assist a ship to steer if the tug is made up to the large vessel（）.

A.by a tow line ahead of the vessel
B.forward on either bow of the vessel
C.approximately amidships of the vessel
D.on the vessel's quarter

5.單項選擇題A towing vessel is tripped when（）.

A.it is overtaken by the tow
B.it is pulled sideways by the tow
C.the weight of the towing hawser causes loss of maneuverability
D.the propeller is fouled by the towing hawser