Beagle wrote:
How on earth does the USN know that the late Lt Cdr Davis 'failed to properly tense his muscles to counter the g-forces from a high speed turn'.
I think that is a very valid question to ask. Without the opportunity to read the report in full, I would guess that it is based on the VTRS recording from the jet. Perhaps the audio indicates that he wasn't performing his G-strain until he was wrapped up in the turn?
Considering that hydration, crew rest and other factors influence susceptibility to grey-out and GLOC, one also wonders whether they were able to rule out these factors as contributory.