NATO air defense ground environment

The NATO Air Defense Ground Environment (NADGE) was a complex system designed to detect and counter aerial threats across Europe. It integrated radar and identification friend or foe (IFF) equipment to track aircraft, distinguishing between friendly and hostile forces. Computers and communication networks processed this data to form aircraft tracks, identify targets, and decide on countermeasures, such as deploying interceptors or surface-to-air missiles. To enhance survivability against nuclear attack, NADGE featured dispersed computer and communication facilities, supplemented by mobile units. The system also utilized gap-filler radars to detect low-flying aircraft and incorporated advanced technologies like over-the-horizon radars and airborne warning and control systems (AWACS) for broader surveillance capabilities.1