How do you pass a buoy with number 4 and flashing red light?

When passing a buoy marked with the number 4 and a flashing red light, you should keep the buoy on your starboard (right) side. This indicates that you are navigating in a channel where the buoy marks the edge of navigable waters. Ensure to maintain a safe distance and be aware of any local navigation rules or conditions that may apply. Always proceed cautiously to avoid hazards in the water.