Can anyone help me out in gps navigation?

Hi......... GPS navigation device is any device that receives global positioning system signals for the purpose of determining the device's current location on Earth. The first GPS system was developed in 1940. GPS devices provide latitude and longitude information, and some may also calculate altitude.GPS device is also having a some additional capabilities like ,it contains maps, which may be displayed in human readable format via text or in a graphical format. It provides suggested directions to a human in charge of a vehicle or vessel via text or speech. GPS system has a transmitter and one receiver. A GPS receiver calculates its position by precisely timing the signals sent by GPS satellite high above the Earth. GPS system is also used in the satellite. I hope this information is enough for you.......