As with any sport, or new activity that you get into, you'll find that freediving has a number of terms that you might be unfamiliar with at first. More so since many are simple acronyms with no real hint of their meaning. Here is a list of some of the most common terms you'll run into when browsing freediving blogs or forums:

 

AIDA International

What is the purpose of a freediving course? You don't need a certificate to go diving. All you really need is some fins, a mask and snorkel, a buddy, some deep water, and you're good to know. So why spend the money and time? Really, the reason is quite simple. And it's the same reason that people take guitar lessons, or a cooking class. Why reinvent the wheel?