DME Homing for real, followed by DME Approaches (Note approach not arrival you younguns) was a regular thing in PNG pre GPS...even in the F28s....something to do with all the NDBs falling over every wet season...for year after year into decades and never being fixed
They were as much a part of our 6 monthly IR renewals as NDB approaches and ILSs...and as mentioned an integral part of our day to day ops in some parts of the country.
Chuck.