INERTIAL NAVIGATION DOES NOT WORK ON AIRFLOWS. IT WORKS ON ACCELERATIONS! ACCELERATIONS ARE INTEGRATED (CALCULUS) TO PRODUCE VELOCITIES, AND VELOCITIES ARE INTEGRATED PRODUCE POSITIONS. IT WORKS JUST THE SAME IN SUBMERGED SUBMARINES, AIRCRAFT AND SPACECRAFT!
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
You are correct, of course. Some of the folks posting comments on the site that G referred to are very confused. Hopefully, they are not pilots — or especially not Airbus engineers!