How is a Sat Nav more useful than a conventional road map?
Navigation has moved on somewhat from unfolding large maps in the car. Sat Navs provide spoken directions telling you where to go without the distraction of looking at a map. Advanced lane guidance lets you prepare for motorway exits and junctions by showing you which lane you should be in. Sat Navs can save you fuel and time and have numerous other useful features making them a must have device.