I'm writing a story that involves human test subjects being outfitted with GPS trackers by a foundation that's in the business of making super-soldiers. (Long story) Anyway, a rival organization captures some of these subjects, and they're unable to remove the trackers immediately for reasons I won't go into. My question is, what are the logistics of transporting a subject from place to place without alerting the foundation to their location? My first thought was to use a signal jammer or faraday cages for transport and storage respectively, but I'm not an expert on either. How long does it take to set up a faraday cage? Can RF jammers be detected from the signals they emit? These are just a few of the questions I have, but the main one I have is, is this idea plausible? Is there a better alternative I'm not seeing? Help would really be appreciated if anybody has insight on these kinds of things.