https://www.pnisensor.com/
Nov 19, 2025 - PNI Sensor is the world’s foremost expert in precision location, motion tracking, and fusion of sensor systems into real-world applications.
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https://www.flyingmag.com/air-force-demonstrates-new-magnetic-navigation-system-to-back-up-gps/
The Air Force collaborated with the Massachusetts Institute of Technology and others to develop an advanced magnetic aircraft navigation system.
air forcemagnetic navigationdemonstratesnewsystem