Checking 6!!
I was viewing a Utube BOP advanced training clip,and this guy was able to look straight back!
I looked in the FAQ's and I didn't see any post.Someone teach me that trick.Looking straight back at 3/4 head movement is about right.Most planes you could only see about that much to the rear.The Spits had a mirror,now that was good thinking on someones part.I believe some P-51's put mirrors in them as well.
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