^{Hello All,  Looking for an answer to this problem.  I did a flight from London EGLL to Frankfurt EDDF using Navigraph AIRAC 1803 plus Charts. which list RW  ILSor Loc as 110.55 - 07C, however during the flight I opened the INIT. and the runway  Data therein was 111.55 which I accepted but the approach into land  I aborted due to ILS not being valid. Has someone got an answer please for future reference. Richard Welsh}

MOD NOTE: Renamed thread: "737 NGX" as a thread title is not at all descriptive.

Find some charts for the ILS approach and look at the course and freq there. Charts has always right(my experience). It should show up in the panel, beside the speed if its correctly inserted. 

20 hours ago, richard welsh said:

Charts. which list RW  ILSor Loc as 110.55 - 07C,

Correct, 110.55 is ILS 07C but notice that 111.55 is opposite direction 25C.  Stick to the info on the charts and if your navdata, charts and scenery all agree you will be okay.

Thanks Dan,  Will take your advice.  Richard Welsh