I can vouch for OzExpats Dme Homing Charts as I and numerous other pilots made use of them when a certain West New Britain (PNG) NDB failed. F28 Jet operations continued into that and many other ports utilizing what our youngest brethren would only scoff at.
There is a lot to be said for a basic set of flight instruments a clock and a good understanding of basic nav.This I might say was only 6 years ago and would STILL be used today.