I've flied DME arcs before using VOR. However today I encountered something different. EGPH Edinburgh NDB ILS DME Rwy 24 uses the ILS (108.9 ITH) as a reference for the arc. How do I tune the RADNAV on the MCDU? I tried tuning the ILS freq as a VOR. When setting the ND to VOR I don't get the necessary information. I need to know certain radials - e.g. crossing the 284 radial is the fix for descending from 4000 to 3000ft. And crossing 260 is the point when turning to the final ILS course. 

Posting the approach plate would clarify a lot, but I'm using Navigraph and there's probably copyright issues. 

EDIT: Found one on VATSIM UK. I'll take the chance to post it here. 

I'm on the latest experimental build. 

Edited April 15, 20224 yr by Cpt_Piett
Typo

The QDM radials are from the NDB “EDN” An ILS cannot be tracked using the bearing pointer like a VOR can - an RMI cannot “point” at an ILS (although in several default MSFS aircraft it does, which is incorrect behavior. This may be fixed in the FBW). You should tune the NDB on the ADF, and overlay the bearing pointer for the ADF on your nav display.  The arc has to be flown strictly by maneuvering to keep the DME distance from I-TH at 12 nm. 

Edited April 15, 20224 yr by JRBarrett

Thanks @JRBarrett! That makes sense!