This manual can answer many of the often asked technical questions about photography.
http://petapixel.com/2013/03/12/a-fr...f-the-us-navy/
I cannot believe that I was required to remember all this stuff including the multiple formulas used in the various aspects of photography. We would be promoted based on another formula which combined the results of a test along with our professional evaluations plus some other parameters which I don't even remember.
Anyway this manual could be fun for today's photographers to read and is a stroll along memory lane for us old timers...
Actually, this edition was published a year after I retired from the Navy in 1989 after 32-years of Naval Service...