单项选择题
Where does the look-out man stand?（）.
A.In positions in which the noises in the ship are least likely to interfere with the hearing of a fog signal and the man can see clearly
B.In positions in which the noises in the ship are much likely to interfere with the hearing of a fog signal
C.In positions in which the hearing of a signal is reduced to a minimum
D.In a position in which the man can see clearly
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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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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
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