You return from the open sea. You see a green lighted buoy with the number 3. What should you do?

When you see a green lighted buoy with the number 3, it indicates a safe navigational mark. This buoy typically marks the right side of a channel when returning from open sea, so you should keep it on your starboard (right) side as you navigate. Ensure you maintain a safe distance from the buoy and monitor your surroundings for other vessels and navigational hazards.