767 miles to run
Hey Wastegate, sitting in YPPH doing the daily gring. I too have heard a heap of different formulas in calculating the track miles req'd. The one I use is a simplified one of yours.
300 kts : 3x Ht +10
250 kts : 3x Ht +7
Ref +80 : 3x Ht +5
Saves on that first step....if you're like me and need every second and cubic millimeter of brain capacity! Catch you on the airwaves. (spoke to devilboy today)
BTW...never thought about the whole 'curviture of the earth' thing on an ILS. Interesting.