Cool tech: tiny IMUs (<a href="https://en.wikipedia.org/wiki/Inertial_measurement_unit" rel="nofollow">https://en.wikipedia.org/wiki/Inertial_measurement_unit</a>) that allow for dead reckoning (<a href="https://en.wikipedia.org/wiki/Dead_reckoning" rel="nofollow">https://en.wikipedia.org/wiki/Dead_reckoning</a>) with low accumulative error rate, but “Targets GPS’s Dominance”?<p>FTA: <i>“Anello’s and OCSP’s IMUs are designed to work alongside GPS, constantly monitoring location inputs“</i><p>These things augment GPS at its weak points: small distances over a limited time period, and inside buildings.