Requirements
Federal law requires specific navigation lights from sunset to sunrise. These communicate vessel size, direction, and right-of-way to other boaters.
| Light | Color | Location |
|---|---|---|
| Sidelights | Red (port) / Green (starboard) | Bow |
| Stern | White | Stern |
| Masthead | White | Forward, above sidelights |
| All-around | White, 360° | Highest point (anchor/small boats) |
Wiring
- Tinned 16 AWG marine wire for LED nav lights
- Dedicated fused switch circuit at helm
- Waterproof connectors at all junctions, especially bow
- Test all lights before launching
- Carry spare bulbs or LED modules aboard
Troubleshooting
- Light out: check fuse, switch, then connector corrosion
- Dim: voltage drop from undersized wire or corroded connections
- Flickering: loose or corroded ground connection
Key Takeaway
Nav lights are safety and legal requirements. Use marine LED upgrades, wire on a dedicated fused circuit, test before every trip.
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Frequently Asked Questions
What lights does my boat need?
Power vessels under 39 ft: red/green sidelights, white stern, white masthead (or combined all-around). At anchor: single white all-around.