DAN (Divers Alert Network) provides emergency medical advice and assistance for underwater diving injuries. It works to prevent injuries and promote diving safety through services like a 24-hour emergency hotline, medical information line, and recompression chamber assistance program. DAN also offers membership benefits such as insurance, publications, and educational courses, and conducts research on diving safety and medicine. DAN is an international nonprofit organization with independent regional branches that cooperate to uphold DAN's mission.