On a chart，the characteristic of the light on a lighthouse is shown as flashing white with a red sector.The red sector（）.<br>A:Indicates the limits of the navigable channel<br>B:Indicates a danger area<br>C:Is used to identify the characteristics of the light<br>D:Serves no significant purpose

On a chart，the characteristic of the light on a lighthouse is shown as flashing white with a red sector.The red sector（）.
A:Indicates the limits of the navigable channel
B:Indicates a danger area
C:Is used to identify the characteristics of the light
D:Serves no significant purpose

出自：海船船员证

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