First satnav used scrolls to keep you on the right road These are pictures of what is believed to be the first on-board map reader. It may be devoid of voice prompts but the Iter Avto, left, created in 1930, is not too dissimilar to today's Garmin and TomTom devices. Just like the modern models, it was positioned on the dashboard. But where a satnav latches on to satellites to guide its user, the Iter Avto used a map on a scroll. The maps, right, were wound from one roll to another across a display and a cable connected to the speedometer controlled the rate, to ensure the map was at the correct point. The map readers were discovered by the website Retronaut.