Boating Coach US
Sound signalsQuestion 132 of 352

You run a power boat in fog and make way through the water. What signal do you sound?

  1. Two prolonged blasts every minute
  2. Five short blasts every 2 minutes
  3. One short blast every 30 seconds
  4. One prolonged blast at least every 2 minutes
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Correct answer: One prolonged blast at least every 2 minutes

A moving power boat gives one prolonged blast at intervals of not more than 2 minutes.

Source: US Code of Federal Regulations (eCFR), 33 CFR Part 83: Inland Navigation Rules, § 83.35 Sound signals in restricted visibility (Rule 35)

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Questions last reviewed: 18 October 2026