It might sound a bit scary that you could be found anytime with the help of wireless positioning system, but actually it probably has more advantages than disadvantages. There have been many cases when a hiker or a simple Sunday walker has been lost in the woods and although he or she makes an emergency call with a mobile phone it is hard to find them by the directions given. When using wireless positioning it is all far much easier and the system can save lives not only people lost in the woods but also in the sea for example if somebody is on a deserted island after a shipwreck.