You are in restricted visibility and hear a fog signal forward of the beam. Nothing appears on your radar screen. You must（）.<br>A:stop your engines<br>B:sound two prolonged blasts of the whistle<br>C:sound the danger signal<br>D:slow to bare steerageway

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

出自：海船船员证

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