I have beat my head against the wall for 10 years and can't understand the terror look in my fellow IFEs' eyes when I bring up TACAN point to point.
When I mentioned this concept, I was told the FARs do not allow for it and was read the verbiage. I couldn't argue the point intelligently based off what was read to me, and I'm not doubting that it is illegal, per the FARs, since it's pretty well spelled out. I just had to chuckle that the one and only way a large majority of Naval Aviation moves around in the IFR system is by means of a non-legal procedure (if we operated under the FARs). Sounded about right.