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Navigation lights and shapesQuestion 75 of 352

What does an all-round light show?

  1. A light only to the front and sides
  2. An unbroken light over 360 degrees of the horizon
  3. A light that flashes 120 times a minute
  4. A light over 225 degrees of the horizon
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Correct answer: An unbroken light over 360 degrees of the horizon

An all-round light can be seen from every direction.

Source: US Code of Federal Regulations (eCFR), 33 CFR Part 83: Inland Navigation Rules, § 83.21 Definitions (Rule 21)

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Questions last reviewed: 18 October 2026