When you are lost and you cannot find your way it is a good idea to have a GPS tracking system in your car, you will receive directions on how to get to the place you need to get to. Above the earth there are many satellites orbiting the earth that are continually communicating and providing information about where the vehicle is located on the earth.
GPS or Global Positioning System tracks your location by interpreting the data received from 3 or more satellites. Since the invention of the cell phone, cell phone companies are able to help the authorities for many years by triangulated the position of someones cell phone by using there signal and the cell towers. Many cars and trucks are able to record the location and speed of the vehicle and is able to transmit this information back to the office.
There are many different types of GPS tracking systems, and many companies are manufacturing them. There are so many different kinds of handheld GPS systems, one kind has a built in radio which allows you to communicate with each other but also allows you see the position of all the other people on your screen, this is good for hikers to keep in contact with each...