I’ve got an issue with ILS DMEs. Specifically at airports where the DME is set to 0 at the threshold.
Essentially, that isn’t happening in the sim. The ILS DME over-reads by ~0.8 NM (like it is reading from the runway mid-point instead) when comparing against the navigraph chart aircraft symbol and cross checking against other navaids.
At airports where the ILS doesn’t read 0 at the threshold (ie. in the USA) there is no issue and the DME reads correctly.
I suspect this is a sim issue but you’re more responsive so thought I’d check here first
thanks for the report and also your trust in our knowledge
I have three questions:
- Do you have an example airport/runway/ILS where this happened and that we can reproduce?
- Which aircraft do you use?
- Have you tried the same without our data, means only with rhe stock data?
Thanks for your support and we will try to find an answer.
It is a problem I encountered a long time ago, especially for most ILSs in UK and many other European countries. The only solution is to set the ILS DME coordinates to those of the corresponding runway threshold. Since it is unlikely this ILS DME “calibration setting” is part of the Jepp database, Navigraph may have to look for a possible workaround but the problem has also to be considered at the “BGL level”, at least for sim versions prior to MSFS.
just tried with an empty community folder and looks like it’s a native sim issue
I’ll raise a ticket with Asobo - they clearly have a strong dislike of ILS DMEs! (ILS DME only works in 180 degree front-course - #6)
Here we go (including a reminder about my previous issue)
If Navigraph users could vote to get this recognised as a problem that would be great (these things only seem to get actioned if they get enough votes!)
Voted Chad … thanks for this great postings. I will also look, if we can offer any workaround for this in the future. I´m in contact with a Hervé - he supports us in a few things with his knowhow - by the way, and official/public thanks @hervesors
just an short update … we have found a solution for this and I´m currently working on the implementation. As soon I´m ready and the solution works as we hope, I will create a new revision for that. In other words, you should be expect correct DMEs with the next revision update (of course, for our dataset only)
Brilliant news! Thanks for the hard work as always Richard (and the rest of the team).
revision 2 is out, which corrects the DME distances during the approach, against the thresholds.
Here your example with revision 2 (EGLL ILS 27R approach):
Around 400 DMEs are corrected, mostly in the European area …
Happy flying & thanks for your input …
PS: please update your AIRAC cycle 2202 to revision 2 via the the Navigraph Navdata Center
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