单项选择题

As look-out，you spot an object 45°off your port bow. You should report the object as（）.

A.broad on the port bow
B.3 points on the port bow
C.3 points forward of the port beam
D.on the port beam

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单项选择题

A vessel may exhibit lights other than those prescribed by the Rules as long as the additional lights（）.

A.do not interfere with the keeping of a proper look-out
B.are not the color of either sidelight
C.have a lesser range than the prescribed lights
D.All of the above

单项选择题

A vessel engaged in trawling will show identification lights of（）.

A.a red light over a white light
B.a white light over a red light
C.a green light over a white light
D.two red lights in a vertical line