No hiker should be without a GPS. These handy devices have really become more reasonable in price these days. A hiking GPS can say you exactly where you are in terms of latitude and longitude. Models all modify, but many also tell distance walked, how rapid your pace has been, distance to the end. Some also show a map of your route and where you are on the map. These can be very handy for the avid hiker. Just make firm you purchase one that is design for outdoor use, they are different than those designed for cars.