When boating if you see a blue and white International Code Flag A (or Alfa flag) what distance away from the displayed flag should be maintained?

When you see a blue and white International Code Flag A (Alfa flag) displayed, you should maintain a distance of at least 100 meters (or 328 feet) away from the flag. This flag indicates that a vessel is engaged in diving operations, and keeping a safe distance ensures the safety of both divers and other vessels in the area. Always be vigilant and respect the marked area for the safety of all involved.