TACAN? I seem to remember a DME but no TACAN. I did however, find a VOR that was squirrelled away in a drop down panel above the Nav's station on my second to last trip on the old girl!!!
Map, compass, stopwatch and a GPS that gives track and groundspeed for cross-check; never missed a display and was never early/late in 3 years (apart from a Medivac Helo getting in the way or bad weather)
LJ