Well also all Xpndr squawks may have done nothing but allow atc to do some DR calculations to find RELATIVE POSITIONS.
I,m gonna give a very unrelated example in aviation to illustrate the point in a simple manner [ for aviation/aerospace engineering as most folks here know is an inexact sciece based on flight test/accident data etc. and is relatively scant, yet thoughly immense]
the IRS of an airliner measure every accerlation about all mutually orthogonal flight axes, it does so using 'very simple' calculus: integrate acceleration to give velocity, doing like with velocity gives total distance traveled.
now sit in an aircraft moving at high speed exposed to a tremendous number of accelerations and perform [using simple Newtonian physics based on a initial position data] and in one hour have the pilot ask; Where are we now?
And
You'll say
Now, try the same manner of calculation with a terrorist hell bent on exceeding an airliner's flight envelope i.e a no man's land even for the manufacturers themselves (who produce these data from the extrema of the flight envelope) and cross check your accuracy based on your calculations with the actual circumstances you will be wrong!!! and say
Aviation is one of many fields wherein, although heavily grounded in science and technique...it is really to ALL involved more of an art.
The AIM/FARS impress NO ONE here because you don't even know how to interpret them neither APD's or approach plates you are presenting
EXPERTS with useless facts. the AIM IS ADVISORY the FARS AREN"T and ATC doesn't/can't command the aircraft.. you have really no more to say neither does anyone else here I' presume
G'day
rhov
Edited too add: even if pax were able to overtake those psychos on the flight deck placing the airgraft into a steep roll, a person like you [pax on UAL 93] had no ability to recover from an upset and land that plane... One pilot here, when you asked how hard is it to fly as 757...he said EASY...well go to sim and try it, and you'll say, yeah easy for you!!!... but no one here is argueing with you about the mathematical equivalence of the five string theories