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)
A large model of a KC-135R Stratotanker is shown mounted inside the C-5 Air Refueling Partial Task Trainer July 23, 2014, at Dover Air Force Base, Del. The C-5 AR PTT allows pilots to practice air-refueling using KC-135 or KC-10A Extender models and images that are projected in to a cockpit mock-up. The models themselves move along a track and have functioning lights and actuators that extend and retract the refueling boom for a realistic experience. Markings on the models are intentionally reversed due to the use of a series of mirrors. (U.S. Air Force photo/Greg L. Davis)
Johnny R. Johnson, an electronics technician for Nakuuruq Solution, performs a visual inspection of mirrors and lenses inside the C-5 Air Refueling Partial Task Trainer July 23, 2014, at Dover Air Force Base, Del. A series of mirrors and lenses project an image of a refueling tanker into a cockpit mock-up to allow pilots to practice air refueling procedures. (U.S. Air Force photo/Greg L. Davis)