Until modern times, navigation has been considered a skill. It took work and knowledge to use a map and compass. In fact, during America's colonial period, only gentlemen were allowed to learn such techniques. However, as we entered into the twentieth century, the new technology emerged that covered the distances between a knowledgeable navigator and an ordinary person known as Global Positioning System (GPS). With a click on a screen, an ordinary person can find his or her way via a complex system involving satellite technology. The GPS satellites transmit a signal to receivers on Earth; the GPS receivers then compare the time which it took for the signal to be received can compare that data with other satellites in orbit. The main positive effect of the GPS system is its accuracy and usability, requiring little knowledge to use it.
