Port Isabel Air Force Station

Port Isabel Air Force Station (ADC ID: TM-190) is a closed United States Air Force General Surveillance Radar station. It is located 18.7 mi north-northeast of Brownsville, Texas. It was closed in 1961.

History
Port Isabel Air Force Station came into existence as part of Phase III of the Air Defense Command Mobile Radar program. On October 20, 1953 ADC requested a third phase of twenty-five radar sites be constructed.

The 811th Aircraft Control and Warning Squadron was moved to the former Port Isabel Auxiliary Naval Air Station on 1 January 1958. It operated an AN/FPS-3A search radar and an AN/FPS-6 height-finder radar at the site, and initially the station functioned as a Ground-Control Intercept (GCI) and warning station. As a GCI station, the squadron's role was to guide interceptor aircraft toward unidentified intruders picked up on the unit's radar scopes.

The Air Force inactivated Port Isabel AFS on 1 June 1961 due to budgetary constraints. Today the site is part of the Port Isabel-Cameron County Airport.

Units

 * Constituted as the 811th Aircraft Control and Warning Squadron
 * Activated on 8 November 1956 at Oklahoma City AFS, OK (not equipped or manned)
 * Moved to Port Isabel AFS on 1 January 1958
 * Discontinued and inactivated on 1 June 1961

Assignments

 * 33d Air Division, 1 January 1958
 * Oklahoma City Air Defense Sector, 1 January 1960 - 1 June 1961