and an ils signal (loc + g/s) is controlled and calibrated very regularly by an aircraft loaded with equipment. you never see those flying the ils's from 100 nm away.
Doesn't mean they
couldn't calibrate it that far out though does it?
Just like Boeing
could have certified flap extension on the 73 above 20000 but didn't....
Personally, I can't see the problem especially if backed up with another navaid whose coverage extends out the relevant distance.
Yet again, common-sense ought to prevail else they'll throw the rule-book at you....just like the detractors on this thread!
