Garmin TracBack®
TracBack is a feature which allows you to return along a traveled path or route without marking any waypoints.
The GPS unit will store a tracklog or "electronic breadcrumb trail" as you travel. When you are ready to return to where you started, the GPS unit will utilize up to a total of 10,000 points in a live track file, to create return directions, in a file with up to 750 points. You can save up to 10 separate back-track files.