Alcohol and drugsQuestion 303 of 352

When is a vessel underway under this part?

  1. When it is not at anchor, made fast to shore, or aground
  2. Only when it is above 5 knots
  3. Only when the engine runs
  4. Only when it is in open sea
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Correct answer: When it is not at anchor, made fast to shore, or aground

A boat is underway unless it is anchored, tied to shore or aground.

Source: US Code of Federal Regulations (eCFR), 33 CFR Part 95: Operating a Vessel While Under the Influence of Alcohol or a Dangerous Drug, § 95.010 Definition of terms as used in this part

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Questions last reviewed: 18 October 2026