USCG Exam PracticeAids to Navigation — IALA-B (US) buoyage
In the IALA-B system, which numbering convention applies to green starboard-hand lateral aids?
- A. Even numbers
- ✓ Odd numbersCorrect
- C. No numbers; green aids use only letters
- D. Numbers above 100 only
Why B is correct
In IALA-B, even numbers are assigned to red (port-hand) aids and odd numbers to green (starboard-hand) aids. Numbers increase from seaward toward the head of navigation.
Cited:Bowditch Ch. 5 §501