Aids to navigationQuestion 259 of 352

What color light do special marks show?

  1. Green
  2. White with Morse A
  3. Red
  4. Yellow
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Correct answer: Yellow

Special marks have yellow lights, with a fixed light or slow flash preferred.

Source: US Code of Federal Regulations (eCFR), 33 CFR Part 62: United States Aids to Navigation System, § 62.45 Light characteristics

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Questions last reviewed: 18 October 2026