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Originally posted by 100days-a-year
tgreaves,the perequisites vary from agency to agency,but here is the path I took OW-Nitrox-Adv Nitrox-Deep air(a long time ago,I knew better)-Technical Nitrox-Trimix.And ther are degrees of trimix diving too.Usually a set amount of dives between certs and must be some deep experience.Costs of classes can reach $5000 + gear.Takes up to 2 weeks for all the classes.Research your instructor no matter what agency you use.My instructor met My standards before we talked about training.