I found this over at The Art of Manliness blog. I thought this was going to be a silly article at first but it is actually pretty good. I bet you never would think of starting a fire with your cell phone battery… — Ever leave home without your cell … Continue reading
This teaches how to aim a two-sided emergency signaling mirror. This August 1943 US Government Training film is a digitized version of the US National Archives copy. Later testing proved retroreflective (“reflex”) signal mirror aimers were more accurate, and the US services changed to that type of emergency signal mirror, … Continue reading