Thank you! I'll check out Scene.dat.
In general though, we can live with 10km visual ability, provided our WO can see a bit further. Now if we could also shift the light fog back a little bit, say, to near those 10km, that would be a good enough solution for me. That way we could realistically take advantage of better visibility on most clear days, excellent WO visibility on fog-less days, and the same good old unforgiving visibility in storms