The Boater's Guide of Arizona: A Handbook of Boating Laws and Responsibilities
The Official Boating Handbook of the Arizona Game and Fish Department - Web Version
Table of Contents
Scuba divers and snorkelers must display a diver-down flag to mark their diving areas. The flag must be displayed whenever someone is diving below the surface.
Vessels should stay as far away from a diver-down flag as is reasonable and prudent for the circumstances. The suggested safe distance from a flag is 100 yards.
A rectangular red flag with a white diagonal stripe is used on Arizona waters, including the Colorado River and Lake System.
A blue and white International Code Flag A (or Alfa flag) is used on federally controlled waters.