I'm having trouble understanding the legal capability of the KNS81 RNAV Computer. Does it comply with B-RNAV (RNAV 5) requirements or am I still flying as NON-RNAV?
When filing a flightplan (EASA airspace):

1. Am I allowed to file waypoints, that are defined by VOR/DME?

2. If so: how exactly do I know whether a waypoint is officially/legally defined on a VOR/DME?

3. Am I allowed to proceed on L/M/N/P (Routes for area navigation which form part of the regional networks of ATS routes) and Q/T/Y/Z (Routes for area navigation which form part of the regional networks of ATS routes) airways?

4. Have a look at waypoints LEVBU and ANORA (Germany) on the Navigraph IFR Low Chart:
   LEVBU is defined as an RNAV Waypoint and ANORA is defined as Combined named intersection and RNAV - however both are located on an airway leading out of DKB VOR slightly NW. Now: what exactly is the difference between these two?

Feel free to ask if my questions are somewhat confusing! I've done my ATPL Theory Exams and always thought, I had a rather good understanding of RNAV, PBN etc. but now it got somewhat confusing when I started getting into the history of oldschool Area Navigation...looks like my knowledge is not as good as I thought!

Cheers!
Max