How far from a diver down flag must a vessel be before operating at greater than idle speed?

A vessel must remain at idle speed within 100 feet of a diver down flag. This regulation is designed to protect divers in the water by ensuring that vessels do not create hazardous wake or waves near them. It's important for boaters to be aware of this distance to ensure the safety of divers. Always check local regulations, as they may vary by location.