When I fly heading 90, in the GPS display in the HUD, I seem to fly slightly NE in Chicago and slightly SE in Sydney. Is this just my imagination, or does this have something to do with magnetic versus true North or something? If the latter, is that significant to IFR flying, or does everything (runway numbers, bearing indicator, A/P heading) conform to one or the other, so the distinction isn’t terribly significant?
Trying to do ILS approaches in low visibility. I have only been marginally successful. When I get the runway in sight, even though I seem centered on the localizer, I often seem a few degrees left or right of the runway. Is this just my lack of aviation skill, or are there some data inaccuracies in the game? Or do these inaccuracies exist in real life? Is there some additional adjustment I should be making besides being centered on the localizer?
Thanks for any advice.