Originally Posted by crankyusi
Tagalonging here, hope everyone doesn't mind. If on a hiking trip, I'd need one for my kid and one for the dog. Any suggestions are appreciated.
Your dog needs a GPS???? Pretty talented dog, I'd say.
A GPSr (Global Positioning System receiver) is used to determine the position (and other information) of the unit itself. Geocaching.com has a lot of information, links, and resources about these. I've been fairly pleased with my Garmin etrek Vista, working with some supplemental mapping disks.
From your comment though, I'm wondering if you're looking for some kind of electronic tracking device (RFID device or something similar?); if so, you might want to confirm. But I can't help you there.