FS,
I know the math has been worked many times...
RWY 1089+53TCH= 1142
[email protected]=467
= 1609 so this corresponds to the GRZ 1600 shown on one part of the LIDO and Jepp charts
Why all of the charts show the GP altitude at GRZ of 1600 (3.14 GPA)with a min at the same point as 1500 (2.4GPA) with the ILS/lighting at 3 GPA.....
Austro Control GmbH is really the entity to contact about all of this...lets see what they have to say...