Atving is about Tracks and Waypoints. Atvs travel off road in the wilderness for the most part. This requires a Gps that can record where you have been and navigate other Atver's past runs using their Tracks. Along the Trails there are points to remember for future references. You can record these points using the Waypoint Feature on your Gps unit. To Trailer to your start point you will need a gps that has lock to road feature so it will guide you to your start point where you unload atv and hit the trails. You could use any old gps unit but I would suggest the following units sold by Garmin.