US Navy developing satellite-independent navigation system

The US Navy has begun developing a satellite-independent navigation technology for regions where the global positioning system (GPS) is not operational.

Instead of GPS signals, the researchers will use cosmic ray muons to navigate through rocky and mountainous terrain and the high latitudes of the Arctic with limited satellite access due to orbital constraints.

According to Office of Naval Research science director Charles Eddy, the military needs to have improved capabilities in navigating GPS-denied areas in the polar region where military exercises are held.