Originally Posted by
GivenRandy
I'm not sure of the technology reasons, but I recall seeing GPS receivers being listed as a do-not-use electronic device. A couple years ago, before it was listed, I liked using mine occasionally. I usually had to put it near the window to get a good signal, but it was neat seeing speeds ten times normal.
What airline
It's not a universal "do not use" device, that's for sure. As one of the posters mentioned above, UA explicitly allows them, as does CO. Haven't checked any EU airlines recently but I know several of them do allow their use.