Air Force Academy retired survival training director
Peter Kummerfeldt lectures/demonstrates signal mirrors
for 4:34 of this 5:28 long video clip online:

Raw video: Signaling : News : KXRM FOX 21

The video is one of three survival videos included in
this article by KXRM FOX 21 of Colorado Springs, one each on:
- Fire Building
- Shelter
- Signaling

Matt vs. Wild: Fires, shelter, and signaling
By Matthew Kruger, Sunday, November 08, 2009 at 9:04 p.m

- R. Fowell

A signal mirror should backup a radio distress signal, like a 406 MHz PLB (ACR PLB) (Ocean Signal PLB)