RAF equipped with Tiger Moths was located at RAF Sealand. In 1951 the station was taken over by the United States Air Force. The 30th Air Depot Wing was located at Sealand, but plans were made to relocate it to RAF Brize Norton, both in the UK. Most assigned personnel of the 30th Air Depot Group were reassigned to the 7558th Air Depot Group of the 59th Air Depot Wing, effective from 26 November 1951. All staff sections of the 30th Air Depot Wing were dissolved, and a Consolidated Adjutant and Military Personnel Section was formed. 30th Air Depot Wing was relieved from assignment to the 59th Air Depot Wing effective 27 November 1951. 30th Air Depot Wing began operating as a tenant organization at RAF Sealand, with base support for the wing being provided by the 7558th Air Depot Group as of 27 November 1951. Jurisdiction of RAF Sealand was transferred from the 30th Air Depot Wing to the 7558th Air Depot Wing on 27 November 1951. It was handed back to the RAF in 1957. Operational station Sealand was a communications support base for RAF operations around the world. It functioned as a third-line repair station for avionics equipment for all three services. The Royal Air Force Almanac 1995 said that No. 30 Maintenance Unit RAF was at the time the main unit for airborne electronic and instrument equipment. It serviced more than 100,000 items of airborne radio, radar, electronic, instrument, and missile equipment a year. It also calibrated and manufactured test equipment. Examples of equipment serviced: C12 Directional Gyroscope (Hercules), and other gyroscopic based navigational equipment. No. 631 Volunteer Gliding Squadron RAF operated at Sealand between 1963 and 2006, initially operating the Slingsby T.21 "Sedbergh" glider and then, most recently, flying the Viking TMk1 conventional winch-launched glider. The gate guard at the main gate until 1988 was Spitfire TD248. It was restored to flying condition in the 1990s. In March 2006, No. 631 VGS relocated to RAF Woodvale to operate the Grob109b 'Vigilant' self-launched motorglider. Civilian Technical Training school Sealand was home to the Civilian Technical Training School giving training in avionics, radio, radar and flight instrumentation. The school also trained ATTOs (Assistant Telecommunications Technical Officers (formerly Radio Technician)), ATTs (Avionics Trainee Technicians), and apprentices. The following apprenticeships were offered: Craft Technician Instrument Maker Electrical Radio Technician Recent history 2001–2008 Defence Aviation Repair Agency (DARA) 2008–2015 Defence