A crew Chief guides a lift-cable as students from the Rescue Swimmer School at NAS Pensacola are retrieved aboard an SH-3 ?Sea King? helicopter. Students practice their newly learned skills through a series of practical performance tests, required to demonstrate techniques to recover downed flight crew and personnel who have fallen overboard at sea. The physically demanding course of instruction lasts four weeks, and follows after each candidate successfully completes four weeks at the Navy?s Naval Air Crewman Candidate School, which prepares them to perform duties as Navy flight crew members. U.S. Navy photo by Chief Photographer?s Mate Chris Desmond.