On Maneuvers: Understanding Channel Markers

How to make quick sense of waterway signage.

There are probably a hundred or more different navigation markers on American waterways, so learning to follow them can be a full-time endeavor. Most markers are set by the United States Coast Guard and some by local marine authorities. If you want to stay off the rocks, learning to identify these marks and symbols on the water and on a chart — and knowing what the fine print means — is mandatory.

Channel Markers
Understanding Channel MarkersBoating Magazine