Answer to Question #134844 in Physics for Belal

Question

The use of Global Positioning System (GPS) is now commonly accepted as part of our normal life; many drivers consider this part of the standard equipment in an automobile. This technology is also being adopted to track the location of people. Individuals tracked include young children, elderly people including those afflicted with Dementia or Alzheimer's, as well as parolees or those under suspicion of terrorism (some of these have not been convicted of any crime).

The continual improvement of the GPS device has resulted in its miniaturization; it can look like an innocuous wristwatch, cell phone, mp3 player, or bracelet all with the ability to pinpoint the longitude and latitude of its day

Answer 1

Yes, this is true. However, most of these devices have electronic schemes that cannot work if they are enclosed by a metal cage such a Faraday cage.