Mastodawn

L4sBot Nov 23, 2023

Commercial Flights Are Experiencing 'Unthinkable' GPS Attacks and Nobody Knows What to Do

Commercial Flights Are Experiencing 'Unthinkable' GPS Attacks and Nobody Knows What to Do - Lemmy.World

Commercial Flights Are Experiencing ‘Unthinkable’ GPS Attacks and Nobody Knows What to Do::New “spoofing” attacks resulting in total navigation failure have been occurring above the Middle East for months, which is “highly significant” for airline safety.

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Dettweiler Nov 23, 2023

That just means you can’t use autoland in low visibility conditions. Modern IRUs (inertial reference unit) are highly accurate laser gyros that can use GPS for correction, but will throw out the data if it doesn’t make sense. Navigation won’t be affected much, and autoland (if used) will still rely on VHF guidance.

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redcalcium Nov 23, 2023

But the article mentioned that “the spoofing corrupts the Inertial Reference System”. How?

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Dettweiler

If it’s a smaller plane (such as a CRJ / ERJ) with only one IRU, it will not be able to determine if GPS is valid or not, so the drift correction gets spoiled.

Large commercial aircraft are using 3 IRUs, with newer aircraft using ADIRUs. If GPS does not agree with the three IRUs, the GPS data is thrown out. If the GPS is within tolerance, correction is applied. You could build up very small errors over a long distance, but you should still be pretty close to the airfield when you get there.