If a buoy is marked with an even number, what does that typically indicate?

The indication of a buoy marked with an even number typically signifies that it is positioned on the starboard side of the channel when a vessel is proceeding upstream or returning toward the source of the waterway. This system is part of the IALA (International Association of Lighthouse Authorities) buoyage system, which establishes a standardized method for mariners to identify navigational markers.

In this system, even-numbered buoys generally denote that they are to be passed on the right (starboard) side of a vessel. This helps guide boaters safely through navigable waters by providing clear visual cues regarding the proper course. Therefore, understanding the nature of buoy markings, including that even numbers correspond to the starboard side, is essential for safe navigation in boating activities.