What should you do if you see a red nun buoy?

If you see a red nun buoy, it indicates that you are approaching a channel marker on the left side when navigating from the open sea toward the harbor or upstream. You should keep the buoy on your port (left) side as you proceed. Additionally, be cautious of your surroundings and ensure you follow all navigation rules to avoid hazards. Always refer to your nautical charts for specific guidance related to the area.