Boating Coach US
Aids to navigationQuestion 231 of 352

What does a buoy with red and white vertical stripes mean?

  1. Navigable water all around the mark
  2. A hazard on every side of the mark
  3. A channel junction to pass on one side
  4. An area closed to vessels
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Correct answer: Navigable water all around the mark

Red and white stripes show a safe water mark. It often marks the middle of a channel or the sea end of a channel.

Source: US Code of Federal Regulations (eCFR), 33 CFR Part 62: United States Aids to Navigation System, § 62.27 Safe water marks

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Questions last reviewed: 18 October 2026