单项选择题
Underway at night，a vessel displaying the lights shown is（）.
A.Engaged in fishing B.Mine sweeping C.A pilot boat D.Under sail
单项选择题 Under what condition are you allowed to depart from the rules of the road（）.
单项选择题 Two vessels meeting in a “head-on” situation are directed by the Rules to（）.
单项选择题 Two vessels are in an overtaking situation.Which of the lights on the overtaken vessel will the overtaking vessel see（）.
