@ben104
Hey Ben,
I’m uncertain how exactly Just Flight models this, but my impression is that, since the Hawk doesn’t have a VOR receiver, all non-GPS navigation is done through the TACAN. Since MSFS was not modeling TACAN, JF works around this by having TACAN channels EQUATE to VOR frequencies.
Now the Hawk does have an ILS receiver. But ILS frequencies are, by convention, in a lower frequency band.
So, with the TACAN/ILS switch in ILS you should only get CDI sensing for an ILS frequency, if you had one dialed in.
And dialing in a VOR frequency, should result in no response at all. Dialing in the TACAN equivalent as printed in the manual, however would.
Unless something has changed recently in MSFS/the Hawk.