单项选择题

While underway at night you observe a vessel’s range lights in line off your starboard beam． You should（）.

A.come right
B.sound the danger signal
C.continue on your course
D.come left

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单项选择题
You are in restricted visibility and hear a fog signal forward of the beam. Nothing appears on your radar screen. You must（）.

A.stop your engines
B.sound two prolonged blasts of the whistle
C.sound the danger signal
D.slow to bare steerageway
单项选择题
You are approaching another vessel and are not sure whether danger of collision exists. You must assume（）.

A.there is a risk of collision
B.you are the give-way vessel
C.the other vessel is the give-way vessel
D.there is no risk of collision
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