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USCG Exam PracticeAids to Navigation — IALA-B (US) buoyage

In IALA-A waters, what color are starboard-hand lateral marks when returning from sea?

  1. A. Red
  2. GreenCorrect
  3. C. White
  4. D. Black

Why B is correct

In IALA-A, starboard-hand marks are green — the same color as the US (IALA-B) system, but reversed in position relative to port-hand marks. The key difference from IALA-B is that port-hand marks are red in IALA-A.

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In IALA-A waters, what color are starboard-hand lateral marks when… — USCG Exam Practice · CaptainsGround