Improved United Kingdom Air Defence Ground Environment – UK air defence radar system in the UK between the 1990s and 2000s Linesman/Mediator – UK air defence radar system in the UK between the 1960s and 1984 List of Royal Air Force stations NATO Integrated Air Defense System References Aviation in Shetland Buildings and structures in Shetland History of Shetland Radar equipment of the Cold War Saxa Saxa Vord Unst