There are many uses for the GPS, the function that is probably the most frequently used is the waypoint. When you enter the woods you set a waypoint and when your ready to go back you can be guided to the point that you entered. You can also set waypoints to stand locations, etc. I like to use mine for maintaining track data, and notes while hunting, scouting, fishing, hiking, etc. There are many models to choose from, from the real no frills to more options than you'll probably ever need. I personally use both a compass and the GPS while in the woods. Probably the most basic unit is the Garmin Etrex for around $100 and the prices go up from there.