I haven’t tried this, but Queenslander John Scott (AKA Ivanavitch on Google Earth Community) has built a Windows server application that reads live GPS data and outputs its as KML in real time, ready for Google Earth.
As long as you’re within internet range, then, you can plot your precise position in Google Earth. And that’s precisely what I was asking for when I sat on my wi-fi enabled SAS flight to New York a few weeks ago, wishing I could use Google Earth instead of the far less impressive on-board mapping system to follow along with the plane. All we need now is a photo of this in action by someone.
Hmm. Now that I think about it, I don’t suppose GPS units work inside a giant Faraday cage. Has anyone ever gotten a position inside a plane with a GPS unit, perhaps from a window seat? Or are planes going far too fast in any case? Maybe the solution then would be to have Scott’s server running on the plane’s computer, serving KML to the plane’s LAN from the cockpit’s GPS coordinates. Unfortunately, that’s beginning to sound far-fetched again.
(The software is “very beta”, and you need a GPS unit, obvs. Initial thread on the software is here. )