Boating Coach US
Sound signalsQuestion 137 of 352

A boat at anchor wants to warn an approaching boat of its position. What may it add to the bell?

  1. Short, prolonged, short blasts
  2. Five short blasts
  3. Two prolonged blasts
  4. Three short blasts
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Correct answer: Short, prolonged, short blasts

This optional signal warns of the anchored vessel and a possible collision.

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