Basically, GPS is an electronic device using microwave signals which are being transmitted via satellite. Comparing it with a simple radio, it comprises a sender, a transmitter and a receiver. The radio signals, often known as electromagnetic waves on the radio frequency are being carried by a medium, which is the ionosphere. So how does this work? In simplest terms, a sender, once activated, sends electromagnetic signals in the air which are being detected by a transmitter (radio towers). The transmitter then relays these signals to a receiver.  However, because of the advancement of technology, the simple radio has evolved to a more complex, but more useful devices like the television and the GPS. In this concept, the GPS is a highly complicated electronic device that enables a GPS receiver to detect the origin, location, direction, speed and time of a certain microwave signal being sent by the sender. It composes of ground control stations, at least 24 orbiting satellites and receivers. Like the radio, the ground control stations send signals to the satellites, the satellites then transmit radio signals and the GPS receivers receive it, this signals are being calculated to know exactly the position of a certain person or object,

GPS is a useful tool not only for military purposes but for civilians as well. For instance, if you have installed a GPS locator on your cellphone and it was stolen; GPS could locate the exact location where the phone is situated. Basically, GPS is used for navigating purposes, measurements, i.e., movements of the earth’s tectonic plates and volcanic activity, land-making, map-surveying, commerce and scientific purposes. It also provides time-reference used in many applications such as synchronization of telecommunication networks.  Also, the GPS may also give precise information whether airplanes are following their specific routes to avoid collision with other planes. Likewise, GPS is useful in controlling land transportation traffic.

While the GPS may have numerous benefits to humankind, the same could affect their lifestyles. One disadvantage of this is when used illegally or in ways to threat or hurt people, the GPS may be a contributor or a tool for crimes. In this case, people may live without security instead. When people know they are being traced because they have a GPS locator with them, they may even lose their sense of privacy knowing they are being watched all the time. Hence, freedom is compromised.