Markers for skin or scuba divers

The regulations require the use of a red flag with a diagonal white bar to be displayed on the water or from a boat by skin divers or scuba divers which would indicate underwater diving and significantly mark their position in such waters.

No vessel other than the tending vessel shall be operated within one hundred feet of diver’s flag which, when displayed on the water or from a boat, indicates underwater diving, or a designated course for racing shells but no such flag shall be placed so as to deny access or use of any boathouse, wharf, harbor, bay, channel or navigable waterway.