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

Test Summary

Difficulty:
702 Number of times this test has been taken.
50% The average score for this test.

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
Preferred channel to PORT - IALA Buoyage System A - 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
Preferred channel to STARBOARD - IALA Buoyage System A - Chart Symbol

Tests

Taking a test can be a great way to build on what you have learnt already and build confidence before taking a formal qualification test. The Preferred Channel Marks test consists of 5 questions randomly chosen from a selection.

702 Total Tests Taken
50% Average Score
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Terminology

Here's a list of the sailing terminiology used within this theory