Good article in the Washington Post by Christie Aschwanden on the limits of high-tech gadgets for timely rescue:
Lost in the wilderness: Tech tools help but they don’t always find someone in time
https://www.washingtonpost.com/science/lost-in-the-wilderness-tech-tools-help-but-they-dont-always-find-someone-in-time/2019/12/13/8122fd5c-bae3-11e9-b3b4-2bb69e8c4e39_story.html
GPS, cellphones, thermal imaging, infrared cameras and drones have improved many aspects of search and rescue, yet finding people lost in the wild remains a stubbornly difficult task. And finding missing persons is urgent, especially if they weren’t prepared to spend the night outdoors
— Rex

