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（）.
单项选择题 A vessel engaged in mine clearance operations is called（）.
单项选择题 A vessel engaged in fishing shall keep out of the way of a vessel（）.
