Rules of the roadQuestion 151 of 352

What is a vessel not under command?

  1. One that has no working radio on board
  2. One that has a new and untrained operator
  3. One that cannot maneuver as required because of an unusual event
  4. One that is moving slower than other boats
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Correct answer: One that cannot maneuver as required because of an unusual event

An exceptional circumstance prevents the vessel from keeping out of the way of others.

Source: US Code of Federal Regulations (eCFR), 33 CFR Part 83: Inland Navigation Rules, § 83.03 General definitions (Rule 3)

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Questions last reviewed: 18 October 2026