USCG Exam PracticeAids to Navigation — IALA-B (US) buoyage
A mariner planning a Near-Coastal voyage to Australia must account for which buoyage system in those waters?
- A. IALA-B, the same system used in the United States
- ✓ IALA-A, where port-hand marks are redCorrect
- C. IALA-A, where port-hand marks are green
- D. A unique Australian system not covered by IALA
Why B is correct
The Light List identifies Australia as an IALA-A region. In IALA-A, port-hand marks are red — the opposite lateral color assignment from IALA-B used in the Americas.