Dedicated site to the history and legacy of the F-106 Delta Dart the Ultimate Interceptor and last of the Century Series Fighters in the Fighter Interceptor Squadrons of the Air Defense Command ADC. The Convair F-106 Delta Dart was a supersonic, all-weather delta wing interceptor aircraft of the United States Air Force from the 1960s through 1988. Referred to as the "Ultimate Interceptor" it was the last dedicated interceptor in USAF to date. Originally envisioned as an advanced derivative of the F-102A Delta Dagger and given the designation F-102B, the "Ultimate Interceptor", as it was known, entailed such extensive changes that in June, 1956, the designation was changed to F-106.