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Navigation lights and shapesQuestion 110 of 352

By day, a vessel at anchor shows one shape in its fore part. Which shape?

  1. One diamond
  2. One ball
  3. One cone
  4. One cylinder
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Correct answer: One ball

The shape for a vessel at anchor is a ball.

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