What does a green can shape the buoy Mark?

A green can-shaped buoy marks the port side of a navigable channel when entering from open water. It is part of the IALA (International Association of Lighthouse Authorities) buoyage system, which uses color and shape to guide vessels safely. The green color indicates the port side, while the can shape distinguishes it from other buoys, such as conical or pillar buoys. Mariners should keep these buoys on their left side when proceeding in the designated direction.