The GPS settings screen displays the altitude of airports in "ft", but the number is actually in meters. See attached screenshot for Dulles airport (KIAD) which is reported to be at 95 ft, but it is at 95 meters or 313 ft.
This happens for all airports so it is not a configuration issue for the airport.
Other altitudes in the screen are correct.
Did not see fg version information so I started fg 3.4.0 and tested. Sure enough it reports 211 feet for KSKF, which is actually 691 feet(210.62 meters).
Thanks for reporting! Fixed in git now with [d628e6]
Last edit: Gijs 2016-01-23