C-5 AR PTT
Maj. Thomas Moseder, a C-5M instructor pilot, concentrates while practicing air-refueling training inside the C-5 Air Refueling Partial Task Trainer July 23, 2014, at Dover Air Force Base, Del. The AR PTT is unlike full-motion simulators where the cockpit in which the pilot is seated moves. Instead, the visuals presented to the pilot are produced by moving a large model in relation to refraction lenses, mirrors and a lighting array to provide a very realistic experience at low cost. (U.S. Air Force photo/Greg L. Davis)