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Navigation lights and shapesQuestion 105 of 352

A vessel restricted in its ability to maneuver shows three day shapes. Which ones?

  1. Ball, ball, ball
  2. Ball, diamond, ball
  3. Diamond, ball, diamond
  4. Cone, ball, cone
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Correct answer: Ball, diamond, ball

The top and bottom shapes are balls and the middle shape is a diamond.

Source: US Code of Federal Regulations (eCFR), 33 CFR Part 83: Inland Navigation Rules, § 83.27 Vessels not under command or restricted in their ability to maneuver (Rule 27)

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Questions last reviewed: 18 October 2026