Boating Coach US
Navigation lights and shapesQuestion 84 of 352

Is a second masthead light required on a power boat shorter than 50 meters?

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

The second, higher masthead light is only required for boats of 50 meters or more.

Source: US Code of Federal Regulations (eCFR), 33 CFR Part 83: Inland Navigation Rules, § 83.23 Power-driven vessels underway (Rule 23)

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Questions last reviewed: 18 October 2026