At night you observe a vessel ahead show three flashes of a white light. This signal indicates that the vessel ahead is（）.<br>A:in distress<br>B:approaching a bend in the channel<br>C:operating astern propulsion<br>D:intending to overtake another vessel

At night you observe a vessel ahead show three flashes of a white light. This signal indicates that the vessel ahead is（）.
A:in distress
B:approaching a bend in the channel
C:operating astern propulsion
D:intending to overtake another vessel

出自：海船船员证

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