Chain Home, or CH for short, was the codename for the ring of coastal early warning radar stations built by the Royal Air Force (RAF) before and during the Second World War to detect and track aircraft. Initially known as RDF, and given the official name Air Ministry Experimental Station Type 1 in 1940, the radar units were also known as Chain Home for most of their life. Chain Home was the first early warning radar network in the world and the first military radar system to reach operational status. Its effect on the war made it one of the most powerful systems of what became known as the "Wizard War".
ROTOR was an elaborate air defence radar system built by the British Government in the early 1950s to counter possible attack by Soviet bombers. To get it operational as quickly as possible, it was initially made up primarily of WWII-era systems, notably the original Chain Home radars for the early warning role, and the AMES Type 7 for plotting and interception control. Data from these stations was sent to a network of control stations, mostly built underground, using an extensive telephone and telex network.
Royal Air Force Boulmer or more simply RAF Boulmer is a Royal Air Force station near Alnwick in Northumberland, England, and is home to Aerospace Surveillance and Control System (ASACS) Force Command, Control and Reporting Centre (CRC) Boulmer.
Remote Radar Head Saxa Vord or RRH Saxa Vord, is a Royal Air Force radar station located on the island of Unst, the most northern of the Shetland Islands in Scotland. As of July 2019 it is once more a fully operational radar station, after closure in 2006. The station's motto Praemoneo de Periculis reflects its role. RAF Saxa Vord is further north than Saint Petersburg in Russia, and on the same latitude as Anchorage, Alaska. The station was named after Saxa Vord, which is the highest hill on Unst at 935 ft (285 m). It holds the unofficial British record for wind speed, which in 1992 was recorded at 197 mph (317 km/h) — just before the measuring equipment blew away.
Remote Radar Head Neatishead, and commonly abbreviated RRH Neatishead, is an air defence radar site operated by the Royal Air Force (RAF). It is located approximately 11 kilometres north-east of Norwich in the county of Norfolk, England.
Ground-controlled interception (GCI) is an air defence tactic whereby one or more radar stations or other observational stations are linked to a command communications centre which guides interceptor aircraft to an airborne target. This tactic was pioneered during World War I by the London Air Defence Area organization, which became the Royal Air Force's Dowding system in World War II, the first national-scale system. The Luftwaffe introduced similar systems during the war, but most other combatants did not suffer the same threat of air attack and did not develop complex systems like these until the Cold War era.
Linesman/Mediator was a dual-purpose civil and military radar network in the United Kingdom between the 1960s and 1984. The military side (Linesman) was replaced by the Improved United Kingdom Air Defence Ground Environment (IUKADGE), while the civilian side (Mediator) became the modern public-private National Air Traffic Services (NATS).
AMES, short Air Ministry Experimental Station, was the name given to the British Air Ministry's radar development team at Bawdsey Manor in the immediate pre-World War II era. The team was forced to move on three occasions, changing names as part of these moves, so the AMES name applies only to the period between 1936 and 1939.
Predannack Airfield is an aerodrome near Mullion on The Lizard peninsula of Cornwall in the United Kingdom. The runways are operated by the Royal Navy and today it is a satellite airfield and relief landing ground for nearby RNAS Culdrose.
Royal Air Force Lindholme or more simply RAF Lindholme is a former Royal Air Force station in South Yorkshire, England. It was located 3.9 miles (6.3 km) south of Thorne and 6.9 miles (11.1 km) north east of Doncaster and was initially called RAF Hatfield Woodhouse.
Royal Air Force Ventnor or more simply RAF Ventnor is a former Royal Air Force radar station located 0.7 miles (1.1 km) north east of Ventnor on the Isle of Wight, England. It was initially constructed in 1937 as part of a World War II coastal defence programme codenamed Chain Home. The site played an important role during the Second World War, providing early warnings of incoming bomber attacks carried out by the Luftwaffe.
Royal Air Force Coleby Grange or more simply RAF Coleby Grange was a Royal Air Force satellite station situated alongside the western edge of the A15 on open heathland between the villages of Coleby and Nocton Heath and lying 7.4 mi (11.9 km) due south of the county town Lincoln, Lincolnshire, England.
RAF Sopley was a World War II station, codenamed Starlight, near the village of Sopley in Hampshire. The Radar Station was opened in December 1940. In 1959 it became an air traffic control radar station, and finally closed on 27 September 1974. Nearby Sopley Camp was built in the early 1950s as a domestic site for the radar station and is probably best known as the initial home of the Vietnamese boat people, in 1979. The camp was sold in 1993 to a local partnership under the name Merryfield Park. Most of the old barracks site had been redeveloped as housing, but the 2-storey building at the Sopley end has been converted into a museum/education centre by Friends Of New Forest Airfields (FONFA). The museum opened in May 2016.
Royal Air Force Holmpton or more simply RAF Holmpton is a former Royal Air Force Cold War era nuclear bunker that was built in the 1950s as an early warning radar station as part of the ROTOR Radar Defence Programme. Located just south of the village of Holmpton, in the East Riding of Yorkshire, England, RAF Holmpton remained a part of the Defence Estate right up to 8 December 2014 when it was sold into private ownership after 62 years of military service.
The AMES Type 80, sometimes known by its development rainbow code Green Garlic, was a powerful early warning (EW) and ground-controlled interception (GCI) radar developed by the Telecommunications Research Establishment (TRE) and built by Decca for the Royal Air Force (RAF). It could reliably detect a large fighter or small bomber at ranges over 210 nautical miles, and large, high-flying aircraft were seen out to the radar horizon. It was the primary military ground-based radar in the UK from the mid-1950s into the late 1960s, providing coverage over the entire British Isles.
Royal Air Force Charmy Down or more simply RAF Charmy Down is a former Royal Air Force station in Somerset, England, approximately 3 miles (4.8 km) north-northeast of Bath and 96 miles (154 km) west of London.
The AMES Type 7, also known as the Final GCI, was a ground-based radar system introduced during World War II by the Royal Air Force (RAF). The Type 7 was the first truly modern radar used by the Allies, providing a 360 degree view of the airspace around the station out to a distance of about 90 miles (140 km). It allowed fighter interceptions to be plotted directly from the radar display, a concept known as ground controlled intercept, or GCI.
Royal Air Force Hope Cove or more simply RAF Hope Cove is a former Royal Air Force radar station. It is located about 1 mile (1.6 km) south west of Salcombe on the south Devon coast, England, co-located with the former RAF Bolt Head airstrip, which was the RAF closed in 1945 but remains in service for general aviation to this day.
Exercise Ardent was a massive military exercise carried out by the Royal Air Force (RAF) over the United Kingdom in 1952. It pitted Bomber Command against a combined defensive force from Fighter Command, Fleet Air Arm, several squadrons of the Royal Canadian Air Force (RCAF) and additional units from the USAF and various European NATO allies. Additionally, various British Army and Territorial Army anti-aircraft forces were included, along with the Royal Observer Corps and their RAF liaisons. Over 200,000 members of the various armed forces were involved in total, with around 1,300 aircraft flying over 7,500 sorties. It was the largest air exercise held since World War II, besting even the multinational Operation Sky Shield of the early 1960s.
