What side should be on the left when passing a buoy marked with a yellow square?

When passing a buoy marked with a yellow square, the appropriate action is to keep it on your port side, which is the left side of the vessel when facing the front (bow). This is an important rule in boating navigation, as specific buoy markings convey directions and safe passage routes. The yellow square specifically indicates that it is a regulatory buoy, typically used to signify an area where navigation rules apply or to highlight hazards.

Keeping the buoy on the port side ensures that you are following the designated navigation rules and helps prevent collisions with other vessels or hazards in the water. Understanding how to appropriately navigate around buoys is crucial for safe boating and compliance with maritime regulations.