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The Emergency Rocket Communications System (ERCS) was designed to provide a reliable and survivable emergency communications method for the United States National Command Authority, using a UHF repeater placed atop a Blue Scout rocket or Minuteman II intercontinental ballistic missile.〔 (LtC Phillip K. Heacock: "The Viability of Centralized Command and Control (C2)", Air University Review , January-February 1979 )〕 ERCS was deactivated as a communication means when President George H.W. Bush issued a message to stand down SIOP-committed bombers and Minuteman IIs.〔(Emergency Action Message: 28 Sep 1991, Preamble 2R4UQ ) 〕 Headquarters SAC was given approval by the Joint Chiefs of Staff to deactivate the 494L payloads beginning 1 Oct 1992. However, Headquarters SAC believed it was inefficient and unnecessary to support ERCS past fiscal year 1991, and kept the accelerated deactivation schedule. ==Mission== The mission of the Emergency Rocket Communications System was to provide assured communication to United States strategic forces in the event of a nuclear attack. ERCS was basically a rocket or missile, that carried a UHF transmitter as a payload instead of a nuclear warhead. In the event of a nuclear attack, ERCS would launch the UHF transmitter into ''low space'' to transmit an Emergency Action Message (EAM) to Strategic Air Command units.,〔(Monitoring Times: "What is an EAM?", 4 Apr 2005 )〕〔(National Museum of the United States Air Force: Emergency Rocket Communications System factsheet )〕〔Department of the Air Force: "Strategic Air Command Weapon Systems Acquisition 1964-1979", 28 April 1980〕〔(Federation of American Scientists: Emergency Rocket Communications System )〕 The ERCS sorties had two possible trajectories, East and West, to inform SAC alert forces in the northern tier bases (i.e. Minot AFB, Fairchild AFB, Grand Forks AFB)〔(SAC Regulation 55-45, Vol X )〕 ERCS was deactivated and taken out of the inventory as other means of emergency communication (i.e. ISST and Milstar) came online. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「AN/DRC-8 Emergency Rocket Communications System」の詳細全文を読む スポンサード リンク
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