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Intrercoastal Waterway

For the sea buoys that delineate channels off the coast of the United States, and for the Intracoastal Waterway (ICW), red is on the right (shore side) when proceeding clockwise around the U. S. from the East Coast to the Gulf Coast,
or proceeding north along the West Coast.

ICW marks are further identified by a small yellow reflector at the bottom of the mark. The same port and starboard marks shown above will look like the following:


Numbers on the marks ascend when traveling in this direction. Where the IALA-B and ICW marks meet, one
must be very careful to observe the change in meaning by referral to local charts.