What is the suggested safe distance a vessel should stay from a diver down flag?

The suggested safe distance a vessel should maintain from a diver down flag is typically at least 100 feet (about 30 meters) in open water. This distance helps ensure the safety of divers by reducing the risk of collisions with boats. In some areas, local regulations may specify different distances, so it's essential for boaters to be aware of and comply with those rules. Always prioritize diver safety by keeping a vigilant lookout and respecting the marked area around the flag.