Navigation lightsQuestion 218 of 566

What does a boat at anchor under 50 m show during the day?

  1. One white flag
  2. One black ball
  3. A cone pointing down
  4. A red light
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Correct answer: One black ball

A black ball by day shows that the boat is at anchor.

Source: Safe Boating Guide (TP 511E, 2026), Table 7: Navigation light and shape requirements, page 30

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Questions last reviewed: 18 October 2026