International Association of Marine Aids to Navigation and Lighthouse Authorities
The International Association of Marine Aids to Navigation and Lighthouse Authorities brings together representatives of the aids to navigation services of more than 80 member countries for technical coordination, information sharing, and coordination of improvements to visual aids to navigation throughout the world. More on International Association of Marine Aids to Navigation and Lighthouse Authorities
Port Lateral Marker
Red BuoyBlinking Red light. Any frequency except 2+1Port Lateral Marker
Red BuoyBlinking Red light. Any frequency except 2+1Port Lateral Marker
Red BuoyBlinking Red light. Any frequency except 2+1Starboard Lateral Marker
Green BuoyBlinking Green LightStarboard Lateral Marker
Green BuoyBlinking Green LightStarboard Lateral Marker
Green BuoyBlinking Green LightCardinal Marker - East
Yellow/Black BuoyEast Quadrant of Hazard. Clear water to East. 3 Very Quick White Flashes.Cardinal Marker - East
Yellow/Black BuoyEast Quadrant of Hazard. Clear water to East. 3 Very Quick White Flashes.Cardinal Marker - North
Yellow/Black BuoyNorth Quadrant of Hazard. Clear water to North. Continous Quick White Flashes.Cardinal Marker - North
Yellow/Black BuoyNorth Quadrant of Hazard. Clear water to North. Continous Quick White Flashes.Cardinal Marker - West
Yellow/Black BuoyWest Quadrant of Hazard. Clear water to West. 9 Quick White Flashes.Cardinal Marker - West
Yellow/Black BuoyWest Quadrant of Hazard. Clear water to West. 9 Quick White Flashes.Cardinal Marker - South
Yellow/Black BuoySouth Quadrant of Hazard. Clear water to South. 6 Quick White Flashes plus 1 long flash.Cardinal Marker - South
Yellow/Black BuoySouth Quadrant of Hazard. Clear water to South. 6 Quick White Flashes plus 1 long flash.Safe Water Marker
Red/White BuoyNavigable water all around mark. White light occulting.Emergency Wreck Marker
Yellow/Blue BuoyPlaced as close to wreck as possible or in a pattern around wreck. Alternating yellow/blue flashing lightEmergency Wreck Marker
Yellow/Blue BuoyPlaced as close to wreck as possible or in a pattern around wreck. Alternating yellow/blue flashing lightIsolated Danger Marker
Black/Red BuoyIsolated danger of limited extent with navigable water around it. White flashing light with group of 2 flashesPreferred Channel Marker - Port
Red/Green BuoyPreferred channel to port. Green group flashing light (2 + 1).Preferred Channel Marker - Port
Red/Green BuoyPreferred channel to port. Green group flashing light (2 + 1).Preferred Channel Marker - Port
Red/Green BuoyPreferred channel to port. Green group flashing light (2 + 1).Preferred Channel Marker - Starboard
Red/Green BuoyPreferred channel to starboard. Red group flashing light (2 + 1).Preferred Channel Marker - Starboard
Red/Green BuoyPreferred channel to starboard. Red group flashing light (2 + 1).Preferred Channel Marker - Starboard
Red/Green BuoyPreferred channel to starboard. Red group flashing light (2 + 1).Special Marker
Yellow BuoyRefer to Chart. Yellow light, any frequency not used for white lights.Special Marker
Yellow BuoyRefer to Chart. Yellow light, any frequency not used for white lights.Special Marker
Yellow BuoyRefer to Chart. Yellow light, any frequency not used for white lights.Special Marker
Yellow BuoyRefer to Chart. Yellow light, any frequency not used for white lights.Special Marker
Yellow BuoyRefer to Chart. Yellow light, any frequency not used for white lights.