Loss of comms doesn't cause a passenger liner to land 100' left of center on an autopilot landing using GPS ... signals
I don't think autopilot landings are legal, even if they are possible. Autopilot is mainly to keep the plane flying straight and level, as far as I've ever heard.
And I would like to think that pilots are using their grey matter a little more than the bozos who program "shortest route" into their GPS and drive off a cliff.
I hope so, anyway.
But if the solar flares can cause trouble with a GPS, just think of all the whining and crying and panic attacks that would occur with a worldwide SCPD (Sudden Cell Phone Death)!
People wouldn't even be able to walk because the lack of the cell phone to their ears would throw them off-balance.
Sue