IALA B Preferred Channel Markers

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Preferred Channel Markers

Theory

Used when there's 2 different navigable channels available, they are placed at the split of channels to identify which is the preferred channel

IALA Buoyage System B

IALA Buoyage System B Preferred Channel Marks are used in the majority of the world including the Americas, South Korea, Japan, the Philippines and the eastern Pacific. The shapes and top marks of the buoys are the same in IALA B as they are for Preferred Channel Marks in IALA A

Port Preferred Channel Marker

Preferred Channel to Port Buoy

Preferred Channel Mark to PORT - IALA B
Major Colour
Red
Minor Colour
Green
Shapes
Conical, Cylindrical, Pillar, Spar
Top Marks
Conical or Pointed Top
Lights
Red light with flashing 2 + 1
Chart Symbol
Preferred channel to PORT - IALA Buoyage System B - Chart Symbol

Starboard Preferred Channel Marker

Preferred Channel to Starboard Buoy

Preferred Channel Mark to STARBOARD - IALA B
Major Colour
Green
Minor Colour
Red
Shapes
Conical, Cylindrical, Pillar, Spar
Top Marks
Square or Flat top
Lights
Green light with flashing 2 + 1
Chart Symbol
Preferred channel to STARBOARD - IALA Buoyage System B - Chart Symbol