Diving in North Carolina
Particular care must be taken when boating in waters where there are divers.
The diver-down flag is red with a white diagonal stripe and must be displayed on the surface of the water by any person or group of persons engaged in skin diving or scuba diving.
The diver-down flag must be displayed only when diving is in progress.
It is forbidden to operate a vessel within 50 feet of a diver-down flag unless the flag is located such that it creates an unreasonable obstruction to navigation.
Vessels operating on federally controlled waters must display a white and blue alpha flag. The flag indicates that the vessel is involved in a diving activity and has restricted maneuverability.