As far as I can tell, this isn't widely known, but around a decade ago some folks deployed a version of this technology for that exact use case: https://www.jpl

As far as I can tell, this isn't widely known, but around a decade ago some folks deployed a version of this technology for that exact use case: https://www.jpl.nasa.gov/news/finder-search-and-rescue-technology-helped-save-lives-in-nepal/ https://www.jpl.nasa.gov/news/finder-search-and-rescue-techn... The obvious military applications for this technology are explored in Tom Clancy's novel "Rainbow Six" (1998).