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US Buoyage

Intracoastal Waterway marks

Technical visualIntracoastal Waterway marks
Intracoastal Waterway marksYellow triangle and square ICW symbols show the route-specific cues for the Atlantic and Gulf Intracoastal Waterway; a plain yellow band is shown without lateral instruction.ATLANTIC & GULF ICW ROUTE MARKS TRIANGLESQUAREBAND Triangle / square carry ICW lateral instruction; a band alone does not.
Intracoastal Waterway marksYellow triangle and square ICW symbols show the route-specific cues for the Atlantic and Gulf Intracoastal Waterway; a plain yellow band is shown without lateral instruction. 123451ATLANTIC & GULF ICW ROUTEMARKS2TRIANGLE3SQUARE4BAND5Triangle / square carry ICWlateral instruction; a bandalone does not.

Yellow triangle

Yellow square

Plain yellow band

For the ICW route, yellow triangle and square symbols are controlling cues. A plain yellow band identifies the route but gives no lateral instruction.

On the Atlantic and Gulf Intracoastal Waterway, yellow symbols identify the ICW route.

When following the ICW conventional direction:

yellow triangle: keep to starboard

yellow square: keep to port

A yellow triangle or square can be mounted on an aid that also has ordinary red or green lateral significance.

For following the ICW route, the yellow symbol is the controlling ICW cue.

A plain yellow horizontal band identifies an aid as part of the ICW but does not itself provide lateral information.

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