eagerbeaver
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This is semantics, and understanding. You are focusing on the 'advanced' part - as a lot of people do. It's actually more important to realise that the name is advanced "OPEN WATER", and the class is in fact designed to be taken directly after your OW class.9 warm water dives don't honestly achieve "Advanced" open water in real life though...
So when taught well, and understood as just a small step up from Open Water, then it is actually advisable to do it back to back. Just don't expect to be an Advanced diver, only advanced open water...