I know how the tracks and trails in Arizona, California and New Mexico look like or at least, what they potray...usually, riding on known trail does not need GPS, but when u r riding on an unknown trail , especially in a rainforest...where u can't see more than 100 feet away, u will need a GPS...
I am an ex cop and i use to be in the jungle forces...jungle forces is similar to the army, the only thing is that we are cops and we fight the commies in the jungles..(we gather intelligence and we also do mopping up exercises..The AR15 or M16 was my wife with 400 rounds of ammo, my browning hi power was my youger bro with 50 rounds of 9mm, and 4 grenades was my gramma) and i am trained to do orienteering and also navigating using topo maps. I do not get lost when I have these maps, compass and my simple navigating tools...but GPS makes it easier...and the 60CSX allows u to backtrail...u are never lost...this allows more fun for riding.
Tokwan = Badass Ninja