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Navigation lights and shapesQuestion 101 of 352

A sailboat under power is 10 meters long. Must it show the cone shape?

  1. Yes, always
  2. Yes, but only in fog
  3. No, and it may not show it
  4. No, but it may
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Correct answer: No, but it may

Boats under 12 meters do not have to show the cone, but they may.

Source: US Code of Federal Regulations (eCFR), 33 CFR Part 83: Inland Navigation Rules, § 83.25 Sailing vessels underway and vessels under oars (Rule 25)

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Questions last reviewed: 18 October 2026