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Part C – Lights and shapes
Day shapes from COLREG
| Navigation status | Day shape | Restriction |
|---|---|---|
| Vessel under sail & power | Cone | > 12m |
| Anchored | Ball | > 7m (not in channel) > 20m (in Anchorage) |
| Constrained by draft | Cylinder | |
| Aground | 3 balls (vert. line) | > 12m |
| Not under command | 2 balls (vert. line) | > 12m |
| Restricted in ability to maneuver | 1 ball+1 diamond+1 ball | > 12m (except dive boats) |
| Fishing (commercial) | 2 cones (vert. line) | > 20m (but must display (nets or trawling) basket shape |
| Vessel towing | Diamond | Tow > 200m |
| Vessel being towed | Diamond | Tow > 100m |
| Minesweeping | 3 Balls | Naval |
- 22. Visibility of lights
- Lights must be bright enough to be visible as follows[11][page needed]
| Light type | Vessels 50 meters (164 ft) or more in length | Vessels between 12–50 meters (39–164 ft) in length | Vessels less than 12 meters (39 ft) in length |
|---|---|---|---|
| Masthead light | 6 nautical miles | 5 miles; except for vessels less than 20 metres (66 ft), 3 miles | 2 miles |
| Sidelight | 3 miles | 2 miles | 1 mile |
| Towing light | 3 miles | 2 miles | 2 miles |
| White, red, green or yellow all-around light | 3 miles | 2 miles | 2 miles |