Boating Coach US
Rules of the roadQuestion 179 of 352

Your boat is 15 meters long. A vessel that can only use a narrow channel is coming. What must you not do?

  1. Impede its passage
  2. Keep to your starboard side
  3. Slow down
  4. Stay alert
Show answer

Correct answer: Impede its passage

A vessel under 20 meters, or any sailing vessel, must not impede a vessel that can use only the narrow channel.

Source: US Code of Federal Regulations (eCFR), 33 CFR Part 83: Inland Navigation Rules, § 83.09 Narrow channels (Rule 9)

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Questions last reviewed: 18 October 2026