You know you're a roadgeek when...

[realjd]

I'm okay at that, but not amazing, so I've always wished my GPS worked at such altitudes.  Alas, it cannot get a signal from the satellites - likely due to the plane's metal skin.

I've never had issues getting a good signal if I put my Garmin next to a window on a plane. It's a hiking/outdoors GPS though and not a road navigation GPS.

[1995hoo]

I knew a fellow who took a GPS on Concorde to try to get the 1350-mph speed readout. It worked fine even at 60,000 feet above the North Atlantic. Again, though, it wasn't a sat-nav designed for use in a car so maybe that's the difference.