Sat Nav is now just another technology that we or use without thinking. We don’t buy maps any more. We just switch on our Sat Nav and it tells us where to go. We all think it’s great. But some people worry that we rely too much on this technology. They think we might be in danger of losing some important skills, such as reading maps. What happens, they say when we are driving alone in a strange place and the Sat Nav battery run out? Then we are really lost!