Hi there,
I seem to remember that the DME/TACAN frequencies were paired to the VHF VOR frequencies, and there was a table in the AERAD/JEPP giving the links. As I recall, the TACANS were marked with a small cartwheel symbol on the Jepp charts, with a channel number. If one checked the list it would give a corresponding VHF NAV freuency. When this was tuned on the VOR receiver it automatically set the appropriate UHF frequency on the DME side of things and up would come the range side of the TACAN (no bearing info).
We used to use it a lot in the Frozen North of Europe!
Cheers
