CNN article on problems in Air Travel, as seen by FAA

John Kulp writes:

Do you ever have one clue about what you're posting.

Yes, I always do.

A GPS tracking unit is a device that uses the Global Positioning
System to determine the precise location of a vehicle, person, or
other asset to which it is attached and to record the position of the
asset at regular intervals. The recorded location data can be stored
within the tracking unit, or it may be transmitted to a central
location data base, or internet-connected computer, using a cellular
(GPRS), radio, or satellite modem embedded in the unit. This allows
the asset's location to be displayed against a map backdrop either in
real-time or when analysing the track later, using customized
software.

That is a system that uses a GPS receiver as one of its components. GPS
itself does not provide tracking. The DoD deliberately designed it that way.