Correct! This is a GPS System.
Think GPS is a new idea? Think again. Long before Garmin and Google Earth, there was the Jones Live Map Meter from c. 1909. Dubbed "phonographs of the road," these small paper discs were printed with different routes calculated by The Touring Club of America. Drivers simply attached the desired disc into the dial with the starting point aligned with an arrow. The car's axle rotated the turntable and the arrow changed position according to the car’s location along the journey.