Boating Basics Online - Basic Boating Safety Course
Chapter 6 - Operations

Aids to Navigation

Preferred channel markers or junction markers indicate the preferred channel at points where the waterway splits or branches off in another direction. If you are returning from sea and see a preferred channel marker that is red over green, to stay in the main channel you would consider the marker as if it were a red marker and keep it on your right. However, if your intended destination is the waterway branch consider the marker a green marker and leave to your port side.

Lateral Buys and waterway markers

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