Main Recommendations
The IALA is primarily known for its buoyage or sea mark systems that are used in the pilotage of vessels at sea:
- Lateral marks indicate the edges of a channel.
- Cardinal marks indicate the direction of safe water at a dangerous spot.
- Safe water marks indicate the deep water and open end of a channel.
- Special marks indicate administrative areas, such as speed restrictions or water skiing areas.
- Isolated danger marks indicate a hazard to shipping.
Each type of mark has a distinctive colour, shape and possibly a characteristic light.
Read more about this topic: International Association Of Lighthouse Authorities
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