What type of lateral marker is indicated by even numbers?

Even-numbered lateral markers are represented by green-colored buoys. These markers are utilized to indicate the left side of a navigable waterway when traveling upstream toward the source of the water. This system is part of the IALA (International Association of Marine Aids to Navigation and Lighthouse Authorities) buoyage system, specifically the regions where this system is applied. The green buoys serve to guide boaters safely and help in maintaining proper navigation routes.

In contrast, red-colored buoys, which are not the correct answer, indicate the right side of the waterway when heading upstream. Yellow buoys typically signify caution, while blue buoys are often found in mooring areas or as informational markers, rather than as part of the lateral navigation system. Understanding these color codes is essential for safe boating practices and navigation on waterways.