USCG Exam PracticeAids to Navigation — IALA-B (US) buoyage
A vessel is entering a US port. The navigator observes a lighted buoy displaying a green light. According to IALA-B, this buoy marks which side of the navigable channel?
- A. The port side of the channel
- B. The centerline of the channel
- ✓ The starboard side of the channelCorrect
- D. A hazard on both sides of the channel
Why C is correct
Green is used on starboard-hand lateral aids in IALA-B. When returning from sea (entering port), a green lighted buoy marks the starboard side of the navigable channel and must be kept to starboard.