[1] Chain Home was a ring of early warning radar stations built around the coastline as part of WWII defences from the late 1930s onwards.

[1] RAF Ringstead Chain Home Radar Station (known as AMES12B and CH12B) was built in 1941, and was fully operational by March 1942.

[1] It was designed with well-dispersed structures: doubled-up transmitter and receiver blocks, a substation and a standby set house in earth-bound bunkers, four 325ft steel transmitter aerial masts and two 240ft self-supporting timber receiver aerial towers.

[1] In 1963, a United States Air Force Tropospheric scatter station was established at Ringstead to provide a cross-channel relay link from High Wycombe Atomic Joint Co-Ordination Centre to a counterpart network in Gorramendi, near Elizondo, in the Spanish Pyrenees.

[1] The Tropospheric Scatter station was operated by USAF No 6 Detachment, 2180 Communications Squadron, [3] and closed in 1974.