Dora-9, yes rated coverage of navaids with a time/distance factor as I recall.
FL200 was an effort southbound, had to make it by "Walker??", fly level, get some extra kts, up a bit and so on. Allowed us to go via NWN rather than WIT/ abeam PHE for the fix. Bloddy DCA were becoming anal in some areas as the DC-3 was fading out
better than DC-3 just the same.
