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Sound signalsQuestion 119 of 352

At what length must a vessel carry a bell as well as a whistle?

  1. 20 meters or more
  2. 7 meters or more
  3. 12 meters or more
  4. 50 meters or more
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Correct answer: 20 meters or more

A bell is added at 20 meters. A gong is added at 100 meters.

Source: US Code of Federal Regulations (eCFR), 33 CFR Part 83: Inland Navigation Rules, § 83.33 Equipment for sound signals (Rule 33)

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Questions last reviewed: 18 October 2026