Light Sectors
Many lights show different colours in different directions (sectors). These sectors are designed to guide vessels on safe tracks. A white sector might indicate the safe approach channel, while red and green sectors mark the limits or warn of dangers on either side.
Sector boundaries are shown on the chart as dashed lines radiating from the light. The colours are given as abbreviations: W (white), R (red), G (green). When you see the light change colour, you know you have crossed a sector boundary.
Key Points
- White sector often = safe channel
- Red/Green sectors often = warning of danger or channel limits
- Sector boundaries shown as dashed lines on chart
- Colour change = you have crossed a sector boundary