My truck has Gps My leo has Gps My FO pkg has GPS....ummm seems like overkill
Your FO does NOT have GPS... directly.
All those Senseaware ID things are BLE (Bluetooth Low Energy). Think temperature beacons, fitness bands, etc. They broadcast the ID signature every few seconds so that hub scanners/LEOs/access points can hear the beacon and go "Oh, it's over here". Get enough devices listening and you can pretty much triangulate where a package is via the strength of signal readings. (otherwise known as RSSI)
If you were to take said FO package on the road, with an old powerpad, drive out to the middle of nowhere and throw it in the middle of a field, the two ways of recovery are:
1) Someone actually finding said package physically and going "wtf?" and giving it back to us.
2) An employee with a LEO drives past, LEO hears the beacon, which then updates the Senseaware tracking on the package with the employees GPS coordinates, giving the trace dept a rough estimation on where that package is.
3) Maybe, Possibly,
very doubtful though -- the truck GPS unit could be listening also.