peekay4:
The hill 3km before the threshold is well below the protection surface of the approach. If that were the only obstacle, a CAT III approach will be possible.
The PATC may end at the 2000m mark, but the hill will still be there, at 3km.
So let's say that the you are flying an A320 and the RVR is 2200m. You should start the MA at a radio altimeter height of 514'. Three km before the threshold you fly over the hill and get a radio altimeter height of 460' (approx 840' baro alt) but the runway is not insight. What do you do? Do you say "my dme is 1.6 nm, I am not there yet, so I can keep going" or do you start the MA at 3 km from the threshold and therefore you would be better off by flying the ILS CAT I and putting this CAT II in the bin?
This was a bit the concern from my first post.
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