Blackcrusader
Contributor
The point I was making is that an agency undertaking deco training has to have a set of objective pre-requisites because they want to protect themselves. "Additional training and experience" that doesn't result in a piece of plastic that says "I have been trained to this standard" is not objective. It varies from diver to diver and environment to environment and someone, either the instructor or at HQ, has to prove compliance with a subjective standard. When I did my technical training there was the allowance for "or equivalent experience", I'm sure it's still the same now, but I totally understand why agencies ask for a minimum AOW in the first instance.
I totally agree that additional experience can make an OW-certified diver capable of diving well beyond 18m. I had a year long gap between OW & AOW and I was more experienced than the divemasters on my AOW were. But if your concern, like an agency providing deco diving certs, is proving that you checked that divers are appropriately trained to be accepted then life gets a hell of a lot easier if you just ask for a second tier training cert.
As I said, I think AOW is bollocks as a formal certification. But it's that 2nd tier of certification and, rightly or wrongly, businesses and agencies use that as a proxy for someone who is not a novice.
You do realize that some agencies teach DECO from OW like CMAS and BSAC. There is no requirement to have AOW to do deco courses. No idea where you did your "technical training" but Deco isn't considered technical diving by some agencies. Do tell which agency is claiming you need AOW to start Deco courses.