What is the main color associated with keeping can buoys on the left side?

The main color associated with keeping can buoys on the left side is green. This is part of the standard navigation system used on waterways, which follows the IALA (International Association of Lighthouse Authorities) buoyage system. In this system, can buoys are typically green and indicate the left side of the channel when entering from the sea or moving upstream.

Green buoys often have a conical shape and are meant to guide boaters safely through channels. The coloration and appearance of these buoys serve an essential purpose in navigation, helping mariners determine the correct course and avoid hazards.

In contrast, red buoys are used on the right side of the channel, and the other colors listed (blue and yellow) do not specifically indicate the position of channel markers in the context of traditional navigation systems like the IALA buoyage system. Understanding this system is vital for safe boating practices, as it ensures that boaters are aware of how to navigate properly in various waterways.