IALA marks

This module is an illustrated guide to core IALA maritime buoyage marks for Region A — colours, topmarks, how to pass and typical lights.

How to use

• Help → IALA marks
• Browse categories: lateral and bifurcation, cardinal, other
• Tap a mark — details with an enlarged drawing

Content (Region A)

• Lateral: port (red), starboard (green), preferred channels
• Cardinal: N, E, S, W
• Other: isolated danger, safe water, special mark