Gandalf-the-Diver
Contributor
... and where would you rank the SDI Solo and PADI Self Reliant certs ?I would say that, generally, the person asking to see your card will have this hierarchy in mind:
OW
AOW
Nitrox
Deep
Rescue
Master Diver
Dive Master
OW Instructor
Note, that isn't necessarily the actual sequence for a lot of agencies, but that seems to be the one that has permeated the industry at large.