Soldiers at Fort Bragg successfully tested an alternative to GPS, which functions by triangulating time-stamped signals emanating from at least four geostationary satellites, and it has been a boon to military operations from anything from navigation to target-seeking. As such, it has become a bull’s-eye for hackers. To work around signal jamming, which has been an issue both offensively and defensively, Echo Ridge, and the Air Force Research Laboratory (AFRL) developed a small device that triangulates off signals of known radio-frequency emitters. For applications requiring visualization, the device can be connected to a smartphone that runs the Air Force Android Tactical Assault Kit. Now that a proof-of-concept has been demonstrated, additional research and development activities will focus on making the device more rugged, user-friendly, and widely-applicable. Development is made possible with funding from the AFRL’s Center for Rapid Innovation.