In the chaotic environment of a fire or disaster area, knowing where your fellow firefighters and first responders are is of the utmost importance, but GPS and other positional tracking systems aren’t always reliable. A project from NASA’s Jet Propulsion Laboratory aims to solve this with a tracker that relies on a totally different kind of electromagnetic phenomenon.
Read more: https://techcrunch.com/2016/12/19/nasa-tech-could-track-firefighters-where-gps-cant-reach/