in yr case Dr
you do remeber what an ADF needle is right?
Sure do Wally! I fly my mandatory 4 per year for currency and CIR renewal, and I have actually flown at least one to the minima for real - into Kidston, about 15 years ago!
..... but when the ADF in the FTDK goes kaput it will be replaced by second TSO146a GPS.
Dr
PS: I also remember DME homings and let-downs!