The Global Positioning System (GPS) are officially used in 1978, during the lauching of satelit block I NAVSTAR ( Navigation System with Timing and Ranging), mainly for military need. The GPS tracking are created firstly to substitute various navigaton system that have been existing before. But in the world today the GPS have been largely used in varie, not only by the military, but untill by civilian. Extended for their own reason and purposes, from personals untill for law enforcement effords.

One example of using GPS Tracking Key for law enforcement efford, was a case happenning in November 2007, the arrestment of George Ford, for the murder of 12-years-old girl Shyanne Sommers, in Chenango Country. Or see the streaming new here :

The accuracy of GPS Tracking is very affordable, one short reason is because the data provided by the GPS device is grabbed from the satellites. The main advantages using satelite as data source one among other reasons are eliminating the nature obstacles factors. Satelite can also send radio signal in high frequency, thus will lead to a more and better accuracy, and better details. The signal receiver of the GPS Tracking unit/device will take the informations and thus translated and counted the data by longitude and latitude data. This specific information thus can be applied through Google Earth. In this way, people can clearly see the information.