AN/URC-117 Ground Wave Emergency Network, Military communication system in California, United States.
The AN/URC-117 Ground Wave Emergency Network is a military communication system with relay nodes connected by tall transmission towers designed for emergency use. Each site contains specialized radio equipment arranged on secured ground that can operate independently when needed.
The system was developed in the 1990s to ensure communication could continue under extreme circumstances. It was specifically designed as a protective measure against failures that could result from massive electromagnetic interference.
The system demonstrates American commitment to maintaining communication capabilities during national emergencies through specialized military infrastructure. It reflects decades of focus on creating reliable networks that can function when standard systems fail.
These sites are protected by high fences and security measures and are not open to public access. Visitors can observe the tall towers from a distance if near any location, but approaching the perimeter is restricted.
The transmission towers operate on extremely low frequency, a wave form that uses the earth itself as a conductor. This allows the signal to reach across vast distances and through obstacles that would normally block other signals.
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