Boating Coach US
Sound signalsQuestion 123 of 352

You do not understand the other boat's plan, or doubt it is safe. What signal do you give?

  1. One prolonged blast
  2. At least five short and rapid blasts
  3. Three short blasts
  4. Two prolonged blasts
Show answer

Correct answer: At least five short and rapid blasts

Five or more rapid blasts warn the other boat of your doubt.

Source: US Code of Federal Regulations (eCFR), 33 CFR Part 83: Inland Navigation Rules, § 83.34 Maneuvering and warning signals (Rule 34)

All questionsPractice the topic "Sound signals"

Questions last reviewed: 18 October 2026