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Preferred Channel Markers

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

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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

Preferred Channel Mark to PORT - IALA A
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 Preferred channel to PORT - IALA Buoyage System A - Chart Symbol

Starboard Preferred Channel Marker

Preferred Channel to Starboard Buoy

Preferred Channel Mark to STARBOARD - IALA A
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 Preferred channel to STARBOARD - IALA Buoyage System A - Chart Symbol