GPS is short for Global Positioning System (as in satellite)

Learn the Art of Reading a Map: outdoors, without electricity
Handheld GPS Units, Hiking Portable GPS
Garmin is the leader in GPS technology and we only recommend this brand. Here at Total Escape, we’re still using our black & white (old skool) Garmin eTrex, purchased in 1998. Gotta love that technology that can last decades, without the need for upgrades.
Garmin Handheld GPS
Hiking GPS Unit