Boating Coach US
Navigation lights and shapesQuestion 86 of 352

On the Great Lakes, what may a power boat carry in place of the second masthead light and the sternlight?

  1. One all-round yellow light
  2. One all-round white light
  3. One flashing red light
  4. Two sidelights
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Correct answer: One all-round white light

On the Great Lakes, one all-round white light may replace those two lights.

Source: US Code of Federal Regulations (eCFR), 33 CFR Part 83: Inland Navigation Rules, § 83.23 Power-driven vessels underway (Rule 23)

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Questions last reviewed: 18 October 2026