refueling point for ADC aircraft deployed to Florida during the Cuban Missile Crisis, to be redeployed to other bases in the southeast shortly thereafter. The base maintained an alert facility from which the F-101 Voodoo and F-102 Delta Dagger interceptors were scrambled to intercept unknown aircraft. Tyndall shared training for the F-102 aircraft with Perrin AFB, Texas until Perrin's closure in mid-1971. Radar station 1956–present On 1 July 1956 Tyndall AFB became the station operating for the third phase of the ADC mobile radar program, designated as TM-198. Activated by the 678th Aircraft Control and Warning Squadron, Tyndall became operational to support the CIM-10 Bomarc surface-to-air missile program at Hurlburt Field. In 1958 the site was operating with an AN/FPS-20 search radar and a pair of AN/FPS-6 height-finder sets to support the 4751st Air Defense Missile Squadron. In 1962 the search radar was upgraded and re-designated as an AN/FPS-64. On 31 July 1963, the site was redesignated as NORAD ID Z-198. During 1965 Tyndall AFB joined the Semi Automatic Ground Environment (SAGE) system, feeding data to DC-09 at Gunter AFB, Alabama. After joining, the squadron was re-designated as the 678th Radar Squadron (SAGE) on 1 June 1965. Also in 1965, Tyndall became a joint-use facility with the Federal Aviation Administration (FAA). It also received a Back-Up Interceptor Control (BUIC) II, and later BUIC III, capability to perform command and control functions. Tyndall retained this function until the 1980s. On 1 March 1970, the 678th was redesignated as the 678th Air Defense Group. In addition to the main facility, Tyndall operated two AN/FPS-14 Gap Filler sites: Carrabelle, FL (TM-198A): Eglin AFB, FL (TM-198B): On 1 October 1979, this site came under Tactical Air Command jurisdiction with the inactivation of Aerospace Defense Command and the formation of ADTAC. On 1 March 1983 the 678th Air Defense Group was inactivated and Tyndall became the home of the NORAD 23rd ADS (Air Defense Squadron) and operated the Southeast Regional Operations Control Center (SE ROCC), later renamed Sector Operations Control Center (SOCC). The height-finder radar, modified as an AN/FPS-116 c. 1977, was removed c. 1988. In 1995 an AN/FPS-64A was performing search duties. The site now operates an ARSR-4 search radar under FAA control as part of the Joint Surveillance System (JSS) as site "J-11". Reorganization, 1991–2018 In 1991, Tyndall underwent a reorganization in response to the Department of Defense efforts to streamline defense management.