What are global positioning devices?
To answer this, the Global Positioning System must be briefly explained. According to Peter Dana of the University of Texas, GPS, or global positioning system, is an operational constellation of twenty-four satellites that orbit the earth every twelve hours. Funded and controlled by the United States Department of Defense, the global positioning system provides specially coded satellite signals that can be processed by a global positioning receiver, or device, enabling a user to compute position, velocity and time. Price? A simple GPS unit will give you coordinates for latititude and longitude only. The average cost is $100. More expensive GPS units will give you the luxury of voice navigation and built-in electronic maps and compasses. The more accessorized the GPS unit, the more you will have to pay. On average, an intricate GPS unit will range between $500 and $1,000.
