Hi LM
In the SDK Simultation variable we have
NAV HAS NAV:index
NAV HAS DME:index
For the TACAN we have only
TACAN HAS NAV:index
So TACAN HAS DME:index is missing.
That is necessary for having a distance on a TACAN DME ONLY co-located with a VOR DME because a TACAN can receive only the distance on a VOR DME.
Regards
Michel