Over the years, the technology involved in manufacturing an automobile has become more advanced, as automakers shift their focus from basic transportation to the design of features that make a vehicle safer, more comfortable, and more easily operated. One such feature is the global positioning system (GPS). A Personal GPS unit consists of a space segment, a control segment, and a user segment. The space segment is a constellation of two dozen satellites orbiting the earth twice every 24 hours.

This Location Based Technology uses Four satellites to simultaneously to pinpoint the precise position of the receiver on the earth. Information from the first three satellites narrows down the range of possible locations to two points; one of these is usually illogical and indicates a point not on the earth. A fourth satellite is used to confirm the target location.

 GPS devices have now been used for many purposes like:

• Natural resource mining
• fishery
• locating and helping in recuse operation
• As a Personal Locator of position
• security and space research