Navigation General · Lateral Buoyage
In U.S. waters (IALA Region B), a red buoy with an even number marks which side of the channel when returning from sea?
- AStarboard (right) side — keep it to starboard✓ Correct
- BPort (left) side — keep it to port
- CThe center of a safe channel
- DAn isolated danger below the surface
Explanation
IALA Region B follows 'Red Right Returning.' Red, even-numbered aids mark the starboard side of the channel when proceeding from seaward toward a harbor or upriver.
Authority: 33 CFR 62 (U.S. ATON System)
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