单项选择题

When your vessel enters thick fog，she should sound（）every two minutes in accordance with these Rules.

A.one short blast
B.one prolonged blast
C.two short blasts
D.three short blasts

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单项选择题

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

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

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