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USAF Ground Air Transmit Receive sites
GATR # (Site #)
AFS, etc. ST
Selfridge AFB MI
San Francisco R-19 (Z-38)   Mill Valley CA
R-25 (Z-15) Topsham[1] ME

The Ground Air Transmit Receive (GATR) network for Cold War communications was part of the SAGE Defense System to automate ground-controlled interception using manned interceptors. Generally located at Aerospace Defense Command radar stations, GATR sites were used for the Ground to Air Data Link Subsystem to transmit "HF/VHF/UHF voice & TDDL"[2] to vector F-106 Delta Dart and other equipped aircraft[1] dispatched by teams in Weapons Direction rooms of SAGE Direction Centers. GATR sites included the RCA AN/GKA-5 Time Division Data Link equipment.


  1. 1.0 1.1 1.2 "Topsham AFS". Cold War Relics. copyright 2009. Retrieved 2013-02-19. "the SAGE block house was bulldozed in 1985."  (image of entrance sign with arrow: "Bangor North American Air Defense Sector")
  2. [specify] , Tim (Sept 21, 2007). "Re: Speaking of AUTOVON" (coldwarcomms message). Retrieved 2013-02-18. "A previously referenced AT&T training manual on SAGE/BUIC/AUTOVON phone systems does list all the AUTOVON/SAGE Switching Centers & includes their General Purpose (AUTOVON) NNX, their SAGE NNX, and … For example, Delta, Utah had 890 for AUTOVON, 764 for SAGE" 

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