I volunteer with our county Search and Rescue and this is something nobody has figured out yet.

There we go. There's the expert chime-in that I was waiting for, to lend me some credibility.

 

There we go. There's the expert chime-in that I was waiting for, to lend me some credibility.

I dunno about "expert" but I've been there and done that .... I even got the Tee shirt..