Lateral Marks

Define the edges of a navigable channel, most commonly when entering/leaving harbours

Test Summary

392 Number of times this test has been taken.
74% The average score for this test.

Lateral marks are used to define the edge of a navigable channel, most commonly when entering/leaving harbours, and consist of 2 different buoys, a port lateral marker and a starboard lateral marker. Red is used for one side of the channel and green for the other side, depending on which IALA buoyage system you are currently in depends on which colour is used for which side. Also which side of the channel the respective buoys are placed depends upon the direction of buoyage.

IALA Buoyage System A

IALA Buoyage System B


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 Lateral Marks test consists of 5 questions randomly chosen from a selection.

392 Total Tests Taken
74% Average Score
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