The ADVANCED OPEN WATER DIVER course is considered as a continuation of learning about diving, so you can do it only if you obtain your Open Water Diver certificate or equivalent level of any other organization.
This qualification enables you to make a little more complicated dives, to go deeper, to enjoy in wrecks, to make night dives and a long etc., developing the necessary skills to be an "Advanced Diver".
Imagine that you begin to do Judo, Karate or any other martial art. Once you start and see that you're passionate about it, your goal is to become a black belt, right? Well you must know that the Master Scuba Diver Level is the BLACK BELT of DIVING.
If you are passionate about diving and want to know a lot about this sport, you should aspire to achieve this status.