James Horgan

Pete / All, Hopefully this is an easy question, i'm new to fooling around in FSUIPC. Having read the Offsets guide, I see there is a couple of ways to read the altitude. 0x0570 would seem to be the best, and gives me alt in metres, but is this AGL? or ASL? I assume as the user in game changes the baro value on the altimeter the offset doesn't change, as the baro is just a display parameter? James