Boating Coach US
Navigation lights and shapesQuestion 76 of 352

Which sidelight colors does a boat show on its starboard and port sides?

  1. Red on starboard, green on port
  2. White on both sides
  3. Green on starboard, red on port
  4. Green on both sides
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Correct answer: Green on starboard, red on port

Green marks the right (starboard) side and red marks the left (port) side.

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