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Reply #88: That becomes problematic in real-time... [View All]

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Home » Discuss » Topic Forums » September 11 Donate to DU
MercutioATC Donating Member (1000+ posts) Send PM | Profile | Ignore Thu Mar-05-09 08:34 AM
Response to Reply #87
88. That becomes problematic in real-time...
Yes and no. On 9/11, we saw that if a plane turns off its transponder and deviates substantially from its filed flight plan, the computer probably will stop tracking it. However, the primary radar return of the plane is always visible. Therefore, the controller very well might be able to still track the plane and, since everything is recorded, the actual movements of the plane would definitely be able to be tracked upon review.

Is a "swap" physically possible with multiple people conspiring? Perhaps, but the timing would have to be perfect and you'd have to be extremely lucky for the right set of circumstances to occur that would allow that timing to even be possible. You couldn't plan for or create that luck, it'd be an extremely slim chance and it'd be completely random. Regardless, though, the swap would immediately be recognized upon review of the radar tapes.

And a swap on the ground or shortly after takeoff is still completely impossible.
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