Radar Bomb Scoring Radar Bomb Scoring ( RBS ) is a combat operation used to evaluate Cold War aircrews ' effectiveness with simulated unguided bomb drops near radar stations of the United States Navy , the USAF Strategic Air Command , and Army Project Nike units . USAF RBS used various ground radar , computers , and other electronic equipment such as jammers to disrupt operations of the bomber ' s radar navigator , AAA / SAM simulators to require countermeasures from the bomber , and Radar Bomb Scoring Centrals for estimating accuracy of simulated bombings . Scores for accuracy and electronic warfare effectiveness were transmitted from radar sites such as those at Strategic Training Range Complex es ( e . g . , from Detachment 1 at the " La Junta Bomb Plot " ) . Most of the SAC sites were in the continental US with units ( detachments ) manned by technicians and operators of the Automatic Tracking Radar Specialist career field ( AutoTrack ) . RBS and the Autotrack specialty were discontinued shortly after the end of the Cold War when increased munitions accuracy ( e . g . , GPS - guided JDAMs 1st used in 1993 ) reduced the need for scoring of simulated bomb runs , and GPS avionics allow onboard tracking for " no - drop bomb scoring " of unguided bombs . History . World War II included Army Air Forces Bombardier Schools ' scoring of trainee ' s proficiency at the " West Texas Bombardier Triangle " and other USAAF ranges ( e . g . , observers on Range Towers ) , and ground - directed bombing for combat guided by automatic tracking radars was used in the Mediterranean Theatre ' s Po Valley . On 6 June 1945 " " the 206th Army Air Force Base Unit ( RBS ) ( 206th AAFBU ) , was activated at Colorado Springs , Colorado under the command of Colonel Robert W . Burns " [ with ] " operational control of the two SCR - 584 radar detachments located at Kansas City and " " Fort Worth " Army Airfield ( Det B ) , and dets were later " " established at Denver , Chicago , Omaha , Albuquerque and " [ at ] " Los Angeles . " " USAF RBS units were at MacDill AFB in 1947 , in Phoenix in 1952 , and Guam in 1954 . Strategic Air Command . RBS by Strategic Air Command began with the last of 888 simulated bomb runs against San Diego scored in 1946 as well as 2 , 499 runs scored in 1947 . The 1948 increase to 12 , 084 was the result of a " scathing " Lindbergh review of SAC in the Spring of 1948 ( SAC ' s commanding general was replaced 15 October , and January 1949 simulated raids by Curtis LeMay ' s " entire command " on Wright - Patt AFB " were appalling " ) . On 21 July 1948 , the 263rd AAFBU ( RBS ) had been renamed the 3903rd Radar Bomb Scoring Squadron ( SAC ) , and early RBS detachments were designated by letters , e . g . , Detachment D at Fort George Wright WA in 1950 . Three detachments of the 3903rd RBS deployed for ground directed bombing in Korea at " Tactical Air Direction Posts " ( colloq . TADPOLE sites ) . ( 10 August 1954 , the 3933rd Radar Bomb Scoring Squadron was redesignated the 11th Radar Bomb Scoring Squadron . ) In 1955 , RBS bomb runs for the SAC Bombing and Navigation Competition were on Amarillo , Denver , Salt Lake City , Kansas City , and San Antonio ( Phoenix also had runs ) and in 1957 , SAC installed RBS sites for the competition ( named " Operation Longshot " which had 3 targets : Atlanta , Kansas City , and St . Louis . The " Goldwater congressional investigation " investigated working and travel conditions at the Lynchburg , Virginia , detachment , which was a mobile unit that had temporary radar stations at " Blackstone , Staunton and Farmville before [ being ] shut … down " . , Det 3 at Heston Airdrome , England , moved to the Fairey Aviation Plant at Langley . On 1 August 1961 , SAC ' s 1st Radar Bomb Scoring Group at Carswell AFB merged with the 3908th Strategic Standardization Group to form the 1st Combat Evaluation Group at Barksdale AFB . Manual RBS " bomb scoring projector " computation of " the bomb problem " with scale , protractor , E6B computer , and bombing tables " was replaced with computerized bomb trajectory integration by the 1965 Reeves AN / MSQ - 77 Bomb Directing Central developed for Vietnam War Combat Skyspot bombing . The Bayshore Bomb Plot in Michigan was destroyed by a television fire on 26 December 1967 , and in 1969 , the Combat Skyspot Trophy was first " awarded annually to the most outstanding [ RBS ] detachment in the 1st Combat Evaluation Group " . At least 1 of the SAC RBS sites was operating until mid - 1994 when " Wilder Radar Bomb Scoring Site " closed after the 1993 Base Realignment and Closure Commission . In 2005 , USAF RBS records were designated for destruction " 10 years after inactivation of site " . Post - Cold War bomb scoring . The Northrop T - 38C was upgraded to have no - drop bomb scoring capability in 2007 by estimating the impact from the onboard GPS - calculated position of release , and the United States Marine Corps had no - drop bomb scoring at Yuma Proving Ground in 2010 . At least 1 Strategic Air Command RBS site continues as an electronic warfare range — the Belle Fourche Electronic Scoring Site in Powder River Military Operations Area with Infrared Enhance Targets and Unmanned Threat Emitters ( the site ' s call sign remains " " Belle Fourche Bomb Plot " " ) .