Aids to navigationQuestion 232 of 352

What shape are red and white safe water buoys?

  1. Conical (nun)
  2. Cylindrical (can)
  3. Round (spherical)
  4. Square
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Correct answer: Round (spherical)

A safe water buoy is a sphere, or has a red ball on top. The round shape sets it apart from side marks.

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