xNav is a startup founded by three Stanford students that have a Stanford class focused on solving national security issues within Lean Startup frameworks. The team was sponsored by the Joint Artificial Intelligence Center (JAIC) to find an alternative navigation system to GPS for aircrafts.xNav is building a reliable vision-based navigation system for precision aircraft navigation. Our solution can be easily integrated into any aircraft and leverages sensor fusion for robustness, with both all-weather and passive capability.