To sort of answer this question:
In 30 years of being a certified diver (most of which was as a www) I've never had an OOA. Going through DIRF changed my style of diving and made me a much better diver though.
Recently I had a new diver where it was advisable to do an air share from 50'. He still had 450 psi in his tank, but I had 2000. The air share went flawlessly and I think I can say that it was made much easier for me to direct the noobie because of all the practicing we do. Was it a save? Not in my estimation - just another CF-less dive.
In 30 years of being a certified diver (most of which was as a www) I've never had an OOA. Going through DIRF changed my style of diving and made me a much better diver though.
Recently I had a new diver where it was advisable to do an air share from 50'. He still had 450 psi in his tank, but I had 2000. The air share went flawlessly and I think I can say that it was made much easier for me to direct the noobie because of all the practicing we do. Was it a save? Not in my estimation - just another CF-less dive.