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US Buoyage

Safe-water mark

Technical visualSafe-water mark
Safe-water markA red-and-white vertically striped safe-water mark with a red spherical topmark and navigable water shown around it.SAFE-WATER MARK navigable water all around
Safe-water markA red-and-white vertically striped safe-water mark with a red spherical topmark and navigable water shown around it. 121SAFE-WATER MARK2navigable water all around

red + white vertical stripes

Navigable water exists all around a safe-water mark; still verify the intended route on the chart.

Appearance

vertical red and white stripes

spherical or other permitted shape

red spherical topmark where fitted

Light

White, commonly Morse "A".

Meaning

Navigable water exists all around the mark.

Common uses include:

mid-channel

fairway

landfall

It does not mean every course beyond the buoy is free from every hazard.

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