The Electro Gyrocator was claimed to be the world's first automated commercially available automotive navigation system.[1][2] It was co-developed by Honda and Alpine.[3][4] Unlike most navigation systems of today, it did not use GPS Satellites to maintain its position and discern movement of the vehicle. Rather, it contained an experimental gas gyroscope that could detect both rotation and movement.[5] Maps were placed inside the unit and it would scroll them past a CRT illumination screen as the car traveled along. In 1981, it was announced as an option on that year's Honda Accord, but at ¥300,000 ($2,746 USD), it was almost a quarter of the value of the car.[6] It is not clear whether any units were actually delivered to customers in the form patented in the US in design patent D274332[7]; as a "dealer option", it is possible that Electro Gyrocators never appeared in any showrooms.