As you approach Kate Aubrey Bar Light (mile 788 AHP)，yoursearchlight will show what type of marking at the light? （）

单项选择题An overtaking situation would be one in which one vessel is approaching another from more than how many degrees abaft the beam? （）

A.0°
B.10°
C.22.5°
D.None of the above

单项选择题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

单项选择题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

单项选择题A vessel must proceed at a safe speed（）.

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

单项选择题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