I learned about this when I was in scouts, precisely because it could be used in disasters or when other forms of...

I learned about this when I was in scouts, precisely because it could be used in disasters or when other forms of communication couldn't. I even learned Morse code for it, which I do not remember at all. I still have friends who are licensed operators.

http://www.npr.org/sections/thetwo-way/2017/09/21/552649149/in-devastated-dominica-hams-become-vital-communications-link
http://www.npr.org/sections/thetwo-way/2017/09/21/552649149/in-devastated-dominica-hams-become-vital-communications-link