GPS means global positioning system. It consists of a group of 27 earth-orbiting satellites. Each circles the globe at about 12,000 miles making two complete rotations every day. At any time of the day, there are at least 4 satellites visible in the sky, anywhere on earth. A GPS receiver locates these satellites, figure out the distance to each and deduce its own location.

Garmin uses this technology to operate their GPS navigation system. Garmin portable GPS has found ways to be useful in practical ways. Most people use it for directional reasons. Someone who finds himself in unfamiliar territory can be helped to find his way with the use of a portable GPS. With the simple touch of a button, you will get information on where you are. A Garmin portable GPS will give you step by step directions on how to get to where you are going.