Originally Posted by
rickair7777
That is not for the ILS, that is for the localizer beam. The GS has a different footprint, I think somebody said ten miles.
Be aware that some ILS's have coverage far exceeding the standard mins...if ATC clears you to intercept the LOC 25NM out, then that LOC is good to at least 25NM.
You're right, I stand corrected:
"The glide slope is normally usable to the distance of 10 NM. However, at some locations, the glide slope has been certified for an extended service volume which exceeds 10 NM." AIM 1-1-9(d3)