SECONDARY SURVEILLANCE RADAR SSR 1950s AIR TRAFFIC CONTROL & NAVIGATION TRAINING FILM XD39564

Want to support this channel and help us preserve old films? Visit Visit our website This late 1950s / early 1960s black and white informational film from the International Civil Aviation Organization (ICAO) explains the basics of secondary radar and illustrates its use in flight navigation and air traffic control using a combination of live-action footage and limited animation (TRT 23:09). It focuses on Secondary surveillance radar (SSR), a radar system used in air traffic control (ATC), that unlike primary radar systems that measure the bearing and distance of targets using the detected reflections of radio signals, relies on targets equipped with a radar transponder, that reply to each interrogation signal by transmitting encoded data such as an identity code, the aircraft’s altitude and further information depending on its chosen mode. SSR is based on the military identification friend or foe (IFF) technology originally developed during WWII, t