Comment: Yes -- we older ones were there for ERCS which began in 1967 and ended in 1991.
This article was highlighted in Air and Space Forces Daily Report of 1 Sep 2023 under "One More Thing."
This ICBM-Launched Satellite Could Transmit Nuclear Codes When Nothing Else Was Left To
The Emergency Rocket Communications System was designed to autonomously transmit nuclear codes in the event of a nuclear attack.
The War Zone
During the Cold War, the U.S. became concerned with the question of how it could initiate the launch of intercontinental ballistic missiles (ICBM) and nuclear-armed bomber strikes should its land-based and airborne command and control systems be destroyed during a nuclear attack. The AN/DRC-8 Emergency Rocket Communications System (ERCS) was the solution.
As well as ground-based nuclear command and control centers, from 1967 on, messages transmitted by ERCS could also have gone out to EC-135 Looking Glass airborne command post aircraft, and later E-6B Mercury ‘doomsday planes,’ equipped with the Airborne Launch Control System (ALCS). ALCS can be used to send launch orders to missile control centers, or remotely trigger a launch under certain circumstances.
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