Applies to flying crew personnel such as pilots, copilots, instructor pilots, navigators and others whose duties are associated with the flight operation of fixed wing aircraft. Includes student pilot instruction, aerial advertising and the operation of balloons. Also applies to aerial photographers and the production of topographic maps, and air ambulance operations conducted with fixed- aircraft. This includes medical personnel who accompany the flight. Refer to code 7403 for ground support personnel, code 4361 for laboratory employees of aerial photographers other than mapping or survey work.