The NASA rover Perseverance, which has been operating on Mars for five years since its landing on February 18, 2021, has been equipped with a new optical navigation system called Mars Global Localization. This system allows the rover to autonomously determine its position with an accuracy of approximately 25 centimeters, a significant improvement over its previous visual odometry method which could result in deviations of up to 35 meters on longer journeys. The new system, first utilized on February 2 and again on February 16, compares panoramic images captured by the rover's navigation camera with a stored terrain map created from data by the Mars Reconnaissance Orbiter. This enhanced autonomy enables Perseverance to travel longer distances independently, facilitating broader exploration and scientific discovery on the Martian surface.