Ask an FE to show you the definition of TERRAIN FOLLOWING (TF) in his 101. That what we were doing in the 80s. It was logged on the 151 as TF.
Look at the definition of CONTOUR FLYING(CF). Not what we were doing.
Next, look at the definition of modified contours, oh wait, there's not one. Some MAC puke coined that catch phrase in the 80s and it got into the books.
BTW, those definitions have not changed in 30+ years (LJ, I think that older than your airplane). MACregs and AFIs have.
Not pointing at anybody in particular but its funny how some people think they're "old heads" and know how it’s “always been done”.