Delaware law requires scuba divers or snorkelers to display a flag to mark their diving area. Vessels not engaged in diving should stay well clear of areas displaying the “divers” flag or vessels displaying the “Alfa flag.”
Two types of flags are used to indicate diving activity.
Scuba divers and snorkelers should not place a flag in an area already occupied by other boaters or where their diving operation will impede the normal flow of waterway traffic. Divers also should follow all of the water safety rules themselves.