Amish, what I don't get (just because I disagree with the idea, not that I'm saying my way is right and I'm a pompous instructor) is this. Let's take an ILS, you likely have 3 approaches there, ILS, LOC, LOC BC. Each is a different type and I agree with that. But I also agree that VOR and VOR DME are different. (Timeoff, please not this pure opinion I'm spouting off) One uses pure timing, and/or intercepting radials, the other uses DME. I strongly feel that if the FAA needs to distinguish the approach with a different then it qualifies as a different approach. Granted, I don't dare try challenging that idea with a student pilot going for their instrument. I keep it ILS, VOR and GPS/NDB as appropriate to the aircraft. Would you have any references to what qualifies a type?