Hi,
as far as I know all modern generation fighter are equipped with an air-to-air TACAN transmitter. And as well they use the "normal" TACAN receiver for air-to-air ranging.
Display should not the problem. In the upper part of the MFD in RADAR mode is enough space to place two fields, one for direction and one for range to the transmitter.
As an further step you could integrate an ground-to-air TACAN to get direction/range from an airbase. So its easier to get that information than clicking trough the in build solution.
And I would like to have an in cockpit editable bullseye to avoid the use of only a way-point as bullseye.
By the way, I am unable to get an accurate idea how far my wingman is away from me (normally you should get it +- 0.1 NM), if I'm in a 80 NM RADAR scope and use only the link feature.
I know there are a lot of wishes at once but these are some steps to approach the simulation of the real F-15C.
Regards Alpha