Friday 19 August 2016

Survival Heliographs: When the sun is behind you. Part Two


Following on from my post on heliographs one of my regular readers observed:
Aiming a signalling mirror with the sun behind you could be tough but basically if you have the sun behind you and a plane in front, the problem (conceptually) is put the mirror flat between the two.”
He is correct. During my research I came across this informative illustration:

Note that the signaller is using his free hand to aim by directing the reflected spot of light on to it.

The Books
http://www.angelfire.com/art/enchanter/epsdbook.html 

http://www.lulu.com/shop/http://www.lulu.com/shop/phil-west/survival-weapons-optimizing-your-arsenal/paperback/product-21488758.html

http://www.lulu.com/shop/phil-west/crash-combat/paperback/product-22603842.html