Automatic tracking radars were used for World War IIground-directed bombing, and at the end of the war SCR-584 tracking radars with OA-294 plotting equipment which recorded the aircraft path during a bomb run, allowing the bomb release point and velocity to be assessed for Radar Bomb Scoring. In 1945, an RBS site was in New Orleans on Marconi Dr, and the 206th Army Air Force Base Unit was organized on 6 June 1945 at "Colorado Springs" and controlled RBS detachments at Kansas City and Dallas Love Field, Texas. "On 24 July 1945, the 206th was redesignated the 63rd AAFBU and three weeks later was moved to Mitchel Field, New York, and placed under the command of the Continental Air Force." "On 5 March 1946, the organization moved back to Colorado Springs and on 8 March of the same year was redesignated the 263rd AAFBU."
On 17 March 1946 the "263 AAF BU" was assigned to the Continental Air Forces' Andrews Field, and after Fifteenth Air Force transferred to SAC on 31 March 1946, the 263rd subsequently transferred from 15AF to directly under Strategic Air Command. RBS scored 888 simulated bomb runs against San Diego in 1946 and in 1947, the USAF was established and MacDill Field, Florida, had an RBS detachment The 263 AF BU scored 2,499 runs in 1947 and its last day at Andrews Air Force Base was 23 February 1948.
The 3903rd Radar Bomb Scoring Squadron was designated from the 263rd AAFBU on 24 February 1948, the first day the unit was at Carswell AFB In 1948, Detachment B was operating an RBS site at Treasure Island, California, and SAC scored 12,084 bomb runs in 1948. By 14 September 1949, the 3903rd RBSS controlled the "Denver Bomb Plot" RBS detachment. Three of the squadron's detachments arrived at Pusan, South Korea, in September 1950 for close air support During the war the 3903rd's detachments were redesignated from letters to numbers, e.g., 3903rd Detachment B became Detachment 13, Det D in 1950 at Fort George Wright, Washington, became Det 12, and Det N deployed in Korea became Detachment 22. The 3 ground-directed bombing detachments in Korea were "out 2 October 1951" when their mobile radar stations transferred to the 502nd Tactical Control Group. ;1951 RBS squadrons: On 16 October 1951, the west coast's 3933rd Radar Bomb Scoring Squadron was activated at Mather Air Force Base, the 3922nd Radar Bomb Scoring Squadron was activated at Carswell AFB, and the 3944th Radar Bomb Scoring Squadron was activated at Turner AFB, Georgia.
3903rd RBS Group
The 3903rd Radar Bomb Scoring Group was established by 12 August 1952 using the number of the 3903rd RBS Squadron at Carswell AFB, but with the headquarters of the 3933rd RBSS at March Air Force Base "sent to Carswell to Headquarter 3903rd RBS Group". Circa 1952 at Carswell, the 3903rd conducted SAC's 2-week course "for those going out to detachments" after they had completed the longer initial radar course at Keesler AFB. 3903rd group commanders included Major Templeton and in 1953, Detachment 6 was at Dallas. The group had transferred to Texas by 10 August 1954 when "Inactivated & Discontinued. When the 3903rd RBS Group personnel and stations were redesignated the 1st Radar Bomb Scoring Group on 10 August 1954, the RBS squadrons were renamed, e.g., the detachment near McClellan AFB became Det 4 of the 11th Radar Bomb Scoring Squadron activated at March Air Force Base on 10 August 1954
