Boating Coach US
Rules of the roadQuestion 181 of 352

When must a vessel not cross a narrow channel?

  1. When the crossing is at night
  2. When the crossing impedes a vessel that can use only the channel
  3. When the vessel is a sailboat
  4. When the channel is wider than 100 meters
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Correct answer: When the crossing impedes a vessel that can use only the channel

Crossing is not allowed if it impedes a vessel that can safely navigate only in the 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