Older GPS often quit working under tall tree cover, when you needed it the most. The newest GPS units have better antennas and are accurate under dense tree cover, inside vehicles or even in buildings.
If you wish to mark any spot on your journey, press the "Mark" button and the GPS will add a "Waypoint", and remember the location, elevation, date and whatever name you assign to that waypoint. The waypoint will show on the GPS map and you can download all your waypoints to a topographic map on your computer.
.gif){kind=spacer}
