Boating Coach US
Navigation lights and shapesQuestion 113 of 352

A boat shorter than 12 meters runs aground. Must it show the two red lights and three balls?

  1. No, it is excused
  2. Yes, always
  3. Yes, but only at night
  4. Yes, but only by day
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Correct answer: No, it is excused

Boats under 12 meters are excused from the extra aground signals. They still follow the anchor light rules.

Source: US Code of Federal Regulations (eCFR), 33 CFR Part 83: Inland Navigation Rules, § 83.30 Vessels anchored, aground and moored barges (Rule 30)

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Questions last reviewed: 18 October 2026