Ran into a young couple on the trail last Saturday as they came busting out the woods onto the trail just in front of me. Long story short, they had a picture of the area map on something like and ipod but did not know where they were. No GPS. No altimeter. They intended to make a right turn at a lake and go cross country to another isolated lake but did not realize the lake they needed to turn at was not visible from the trail. They made the turn at a lake about 1/4 mile later thus ending up meeting me, about one mile off course east of where they wanted to go. My hiking partner was just ahead and I called him back and he shared his 7.5 map with them and we sent them on their way. They were dumbfounded when they found out how far off course they were.
If you don't know where you are then you're lost.