Sector lights
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Image:Fishing light Perämeri Finland.jpg Sector lights are a man-made pilotage and position fixing aid that indicates a safe channel through shallow or dangerous waters.
Generally, there are three lights of different colours, each identifying a sector:
- white - this sector is inside the safe channel
- red - indicates the port (nautical) side of the channel for incoming vessels
- green - indicates the starboard side of the channel for incoming vessels
