P.26+(Wilson+&+Daniel)

The diagram illustrates how an electronic tracking device can track a person in order to find them by using a machine. There are three basic stages in the process. The first stage in the tracking process is to hide the device (the tracker) in an appropriate place such as a rucksack. The location of the device can be monitored by satellite. A message will be transmitted from the device to a transmission tower. It is received and then re-transmitted as a text message to a mobile phone indicating exactly where the person is. His or her location can also be picked up on Internet website. The device is able to provide details such as the name of the road or pinpoint a specific place on a computer. By using this technology, we can find a missing object or person easily. We can also transmit messages to other places far away quickly. It helps us a lot and increases our work efficiency.