I don't believe I've mentioned that I had my wife carry my SPOT unit with her on the trip to Italy. It's an PLB (or ELB) for those of us with worrisome wives . . . I go paddling, hiking, camping, etc. anywhere I want without her worrying about it because she can track me online.
There's a track feature that keeps sending signals every few minutes or an OK feature that lets me send it manually. Also 911 (send coordinates to the GEOS International Emergency Response Center) and Help (tells family to come get me).
Wasn't trying to sell these things, just explain. Here's her trip so far:
It'll make it nearly impossible for her to sneak up on me and discover all of the drunken debauchery the dogs and I have gotten into in her absence.