Quote:
Originally Posted by Kindnugs 
Active tags which have a power source can and do have gps capability. The size of these tags are pretty big. They are used a lot on the shipping containers at our docks.
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Actually yeah, I was reading a article that was looming on the future of what Verisign was doing. They are working on a RFID chip for human implant, for long distance and possibly global tracking. I assume its a semi-active implementation, but since the announcement three years ago and the FDA go ahead, I guess I've heard virtually nothing about it.
However, there is a company that is working with low-profile GPS tracking devices for everyday consumer use. Watches, cellphones, and whatever else you may think of.
Wherify Wireless
While I haven't seen any active demonstrations on GPS tracking for implants, I must say I'm sure its getting there.
The main problem isn't the size of tracking devices; its the additional of antenna and power supply (that we know of)
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