Although it is difficult to rise with a rigorous set of criteria to evaluate how good an idea is, many drivers would agree that satellite navigation systems ant they were. It has transformed my driving and taken all the stress away. You just order in the correct post code and the sat nav guides you to your drive. The sat nav spoken aloud prevent you from getting lost. It’s a great concept. Satellite navigation was originally used for military , such as the delivery of weapons and the tracking of troops. These days, the technology is used by pilots, sailors, explorers and taxi drivers. And, from my point of view, the best thing is that my wife isn’t going to say to me: “lf you’d brought a map, we wouldn’t be (14)__________ now.”