car navigation system

car navigation systems

Once upon a time navigators would use the stars to figure out where they were and where they were heading, these days we have GPS navigators which aren’t that much different from the old days. GPS navigators in a nutshell work by having a number of satellites in the earth’s atmosphere which transmit data about the earth and objects on the earth to positions on the ground. Very similar to what the old navigators did but with a few extra technological features.

Originally GPS was used for the military, aviation and seafaring industry and satellites that provide this service began launching in 1978 and since have grown in numbers to a total of 24 circling the earth. These 24 satellites help to give such accuracy to navigation systems that they could just about pin point a pin in a hay stack. One thing that is important to note about a GPS service is that it is free, unlike telecommunications services which we pay for.