Hi all. Can anyone tell me whether there are anti-theft products on the market that make use of gps to allow authorities to track a stolen boat? I have a powerboat that is often moored in a harbor in the caribbean and could possibly be a target of theft. It would seem there must be some kind of transponder that could be hidden in an inconspicuous place that would allow recovery of the vessel should it fall into criminal hands. I've done some searching online, but didn't come up with anything.