Aids to navigationQuestion 253 of 352

A lighted aid shows a green light. What does it mean when you go in the Conventional Direction of Buoyage?

  1. Keep the light on your left (port) side
  2. Keep the light on your right side
  3. Pass on either side
  4. Do not pass the light
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Correct answer: Keep the light on your left (port) side

Green lights mark the port side of a channel. Red lights mark the starboard side.

Source: US Code of Federal Regulations (eCFR), 33 CFR Part 62: United States Aids to Navigation System, § 62.45 Light characteristics

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Questions last reviewed: 18 October 2026