RECCO Backpack Rescue Reflector

Why This Is Always On My Pack - RECCO Backpack Rescue Reflector
HikingGuy.com

People are always going off into the wild, well, some people are, and sometimes they get in trouble.  When they get in trouble, we often mount massive search operations to try and locate them. There are beacons (like EPIRB) and there are satellite radios, but they are considerably more expensive and they require someone to press the go button, something this gizmo doesn't need.

Negative Nancy's over on Reddit don't like them for finding skiers buried under an avalanche because if you aren't found within ten minutes, you are likely dead. I dunno, a radar unit could cover a bigger area faster than an army of trolls with poles, but you'd need to have a radar unit on hand. How likely are you going to have an army of trolls on hand, especially if you are outside the ski areas boundaries? I wonder if a claymore would be more useful. Point it upwards and blast the snow away? Lots or problems with this idea, but I kind of like it. Explosive thrills, you know.

I am impressed with how simple this device is and how light the handheld detector is (1 kilogram).

I wonder if they would work in an urban environment.