The reason why they make no reference to any other height/length/distance measurements is because they (the USA) make aircraft that are designed to be big enough to sit in – strange concept to British designers. I know, as I have to squeeze myself into a cockpit obviously designed using measurement data from the Victorians.
When I got selected for the jet I fly, before I was allowed to start the training, I had to be strapped in, in full kit and then the seat and I were lifted out using a crane. I’m not that big either.
Sorry, just had to have a winge.
MOG