Advanced scuba Diver Development ProgramIntroduction The SDI Advanced Diver Development Program was created to make true advanced divers. Under the old way of training a student could take an advanced course immediately following an open water course, and only have a total of 9 dives, all under the direct training of an instructor. The SDI Advanced Diver Development program requires a new open water student to complete 4 SDI, TDI or ERDI Specialties or equivalent, combined with 25 logged
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