What if your return from the open sea you see a green can buoy what should you do?

If you see a green can buoy while returning from the open sea, it indicates that you are approaching a navigational channel or harbor entrance. According to maritime navigation rules, keep the buoy on your starboard (right) side when heading upstream or into port. Ensure to check your charts and GPS for any specific navigational instructions related to the area. Always maintain a safe distance from the buoy and be aware of other vessels in the vicinity.