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Scuba diver

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.

Divers Flag

Divers Flag
A rectangular red flag, at least 14 x 16 inches, with a white diagonal stripe that is one-fifth the width of the flag must be mounted on a float or buoy.

Alfa Flag

Alfa Flag
A blue and white International Code Flag A (or Alfa flag), at least 3.3 feet (one meter) high and visible from all directions, must be displayed on vessels on federally controlled waters. This flag indicates that the vessel is involved in a 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.