Tech tools in wilderness search and rescue

This Washington Post article is about lost person searches in the wilderness: "Lost in the wilderness: Tech tools help but they don’t always find someone in time"

Side note: There are volunteer search & rescue groups very similar to CERT, including some with trail-sniffing dogs or on horseback. I was a "ground pounder" myself. Most searches were for Alzheimer's patients, but we had lost hikers & missing kids too. 

I highly recommend the Wilderness First Aid (WFA) course offered by the National Outdoors Leadership School (NOLS), even if you won't use it in the wilderness.