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IDTANDY
08-21-2012, 04:38 AM
I found this interesting.Used to teach this to Aircrews.
http://www.arizonamilitia.com/manuals/Dark%20Adaptation%20And%20Natural%20Night%20Vision .pdf
Grumpy Old Man
08-21-2012, 04:42 PM
Great info the IDT!
bacpacker
08-21-2012, 11:54 PM
Good info ID.