Originally Posted by Lartnev
I think when it's time for planes to be flying themselves they'd be relying on more than just gyros (ie GPS, ground signals etc).
At least I'd hope they'd be
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They already do. GPS isnt accurate enough to be used to fly a plane into land though. That couple meters diffrence is too much for a computer to use to calculate its exact position over a runway. That plane right there failed because the GPS was thrown off by 10 meters, the plane started to land, the elivation changed more than it was supposed to in the computers mind and it compensated by moving the flight path further down the runway, into a forest.
Signals from the ground are already everywhere. Aircraft use a series of ground stations to figure out where they are. VORs, VORTACs, DME, ADF, and VOR Localisers all enable a
pilot to tell where he is in relation to airports. The VOR Localiser in specific gives the pilot a glide slope to land with, the only problem is, that glide slope stops at 25 feet from the surface. Then its up to the pilot to judge the landings.
Diffrent types of airplanes are rated for diffrent types of weather. The worst weather is 0 0 visibility and only the super modern planes like A380s which are labled as Catagory 4 aircraft can preform a 0 0 landing. While this is possible it is very unsafe and as far as I know they hardly do it.