No need to shout, if you had bothered to read my post before you flying off the handle you would have seen that the quote that seems to have hit your hot button was from Air France pilots talking about the possible causes of the crash. That business about differential pressure signals was their comment, not mine. My comments inserted into the discussion thread reveal to anyone who bothered to read them, that we are in substantial agreement as to what is and what is not an inertial navigation system.
Forty years ago I managed to struggle my way through four semesters of CALCULUS, differential equations, vector analysis, numerical methods, and more. I graduated with two engineering degrees and made Honor roll every term. Do not presume to teach your grandfather how to suck eggs!
Regards,
GtG
After I read the post about the post about three more times, it started getting ambiguous about who said what.
I took all the same courses (but no Honor Roll).
And you’ve only got about five years on me, “Grand-dad”. ;-)