IALA Buoyage System A
IALA Buoyage System B Preferred Channel Marks are used in the majority of the world including Europe, Africa, Australia and most of Asiac. The shapes and top marks of the buoys are the same in IALA A as they are for Preferred Channel Marks in IALA B
Port Preferred Channel Marker
Preferred Channel to Port Buoy
- Major Colour
- Green
- Minor Colour
- Red
- Shapes
- Conical, Cylindrical, Pillar, Spar
- Top Marks
- Conical or Pointed Top
- Lights
- Green light with flashing 2 + 1
- Chart Symbol
Starboard Preferred Channel Marker
Preferred Channel to Starboard Buoy
- Major Colour
- Red
- Minor Colour
- Green
- Shapes
- Conical, Cylindrical, Pillar, Spar
- Top Marks
- Square or Flat top
- Lights
- Red light with flashing 2 + 1
- Chart Symbol
