A green buoy marks the edge of the channel on a boater's which side when entering from open sea?

A green buoy indicates the left side of the channel when entering from open sea due to the IALA (International Association of Lighthouse Authorities) system. In this system, green buoys are typically used to denote the port side of the channel, while red buoys mark the starboard side. This buoyage system helps to guide vessels safely through navigable waters by indicating where it is safe to navigate.

Therefore, when approaching a channel from the open sea, boaters should keep the green buoy on their left side to ensure they are navigating within safe boundaries. Understanding the significance of buoy colors and their positioning is crucial for safe boating practices, allowing mariners to avoid dangers and stay within marked navigational paths.