In 1952, the RIB was renamed as Radio Introduction Unit (RIU) and became responsible for the introduction into service of all airborne and ground radio systems. The unit had a complement of ten officers dealing with airfield approach aids, airborne tail warning, Doppler navigation, weapon aiming and airborne interception for aircraft such as the Gloster Javelin, Bristol Brigand, Vickers Valetta, de Havilland Venom and Gloster Meteor. The unit moved to RAF Benson in 1977. See also Aerial reconnaissance Imagery intelligence National Collection of Aerial Photography Telecommunications Research Establishment References Further reading External links The Medmenham Collection The National Collection of Aerial Photography RAF Medmenham circa 1974 Air view Medmenham History of Buckinghamshire Military installations established in 1941 Military installations closed in 1977