GPS-based navigation is now widespread in many urban areas, and is a useful convenience for driving in alien environments.
The presence of GPS in vehicles not only allows the vehicles to know where they are, but also helps the owners of the vehicles to locate their vehicles.
This is particularly true when a vehicle is stolen.
Being able to locate a vehicle using GPS can be extended to other scenarios as well.
Any GPSequipped item can be located when stolen or misplaced (with appropriate software and communication support).