Picture the moment every driver has learned to distrust. You enter a tunnel, the little blue dot on your phone freezes, guesses, then leaps two blocks sideways. Multiply that annoyance by a delivery fleet, an ambulance, or an armored vehicle in a place where someone is actively jamming the signal, and the stakes stop being cosmetic. This is the exact moment TERN was built for - and in TERN's demonstrations, the blue dot never flinches.
TERN is an Austin startup with an unfashionable opinion: the global positioning system, the invisible utility that roughly four billion devices lean on, is a single point of failure. It can be jammed. It can be spoofed. It gets confused by skyscrapers and swallowed by tunnels. And yet almost everything that moves has quietly agreed to depend on it.
The idea, in one breath
TERN's answer is a product called IDPS - the Independently Derived Positioning System. The name is a mouthful; the concept is not. Modern vehicles and phones are already stuffed with sensors that feel motion: accelerometers, gyroscopes, wheel-speed readings. TERN's AI listens to that stream of motion and matches it, in real time, against ordinary map data. Turn left here, climb this grade, hold this speed for 400 meters - and the map has only one place that story could be true.
No satellite. No new hardware bolted under the dashboard. Just software reading instruments that were already there, doing the kind of dead-reckoning a sea captain would recognize, sped up by machine learning.
Why the hard part is starting
Anyone can guess your next position if they already know your last one. The genuinely difficult trick is the one TERN claims as a first: the cold start. IDPS can be switched on with no prior fix, no triangulation, no borrowed signal - drop it anywhere and it works out where "here" is from motion alone. That is the part navigation engineers tend to raise an eyebrow at, and the part that won TERN a place in the U.S. Army's fiercely competitive xTechOverwatch program.
There is a pleasing irony baked into the technology. GPS is at its worst exactly where cities are densest - among the tall buildings that bounce and block satellite signals. Those same dense streets are where maps are richest and turns are most distinctive. TERN tends to perform best where GPS performs worst. In downtown testing, the company reports its positioning outran the satellites.
Built by people who lost the signal for real
The founding team is an unusual pairing. On one side sit AI engineers; on the other, former U.S. special operations personnel who have navigated for a living in places where a GPS outage is not an inconvenience but a genuine hazard. Chief executive Shaun Moore spent roughly eleven years in facial recognition and sold his previous company, Trueface, before turning his attention from recognizing faces to locating them. President Brett Harrison is a former Navy SEAL. Chief product officer Phil Reason is a career special-operations navigator and scout sniper.
The result is a company with a distinctly practical temperament. Its stated motto - "born from experience, built for resilience" - reads less like a marketing line and more like a design brief.