Thanks chevvron
so that explains why a GS with more than 3 degrees is not very common.
There is a VORDME approach for rwy 27 in Heraklion, it starts at 7 DME and 2,500' (the VOR is located slightly to the north and beyond the threshold of rwy 27) the gradient is 5.8% down to 1,100' (threshold elevation is 82') which is the MDA for that approach (RVR for a straight-in approach is 2000m).
The reason for that MDA is the high terrain to the south of the approach path which runs along the northern coast of Crete.
I just wanted to find out if this terrain is hindering the installation of an ILS.
Thanks guys
