AIDA has a certification system.
It is build around modules on theory and practice, if you succesfully finish all the modules you get certified at a certain level.
1* 2* 3* freediver, 1* instructor , 2* intstructor etc....
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Enter your favourite spots at:
-- www.freedivingspots.net --
or add your website to:
-- links.freedivingspots.net --
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