单项选择题
A.The vessel must carry only the lights that comply with the rules; the others may be omitted
B.The vessel's lights must comply as closely as possible，as determined by her government
C.The vessel must be altered to permit full compliance with the rules
D.An all-round light should be substituted for the after masthead light and the stern light
单项选择题 You are Master of a towing vessel engaged in towing three barges astern.The middle barge of the tow would be required to sound which of the following during restricted visibility （）.
单项选择题 You are approaching another vessel and will pass starboard to starboard without danger if no course changes are made.You should（）.
单项选择题 You are aboard the give-way vessel in a crossing situation．What should you NOT do in obeying the Rules（）.