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Courses &
certifications.
An editorial guide to scuba diving certification pathways — from your first descent to professional instruction.
The agencies
PADI
Professional Association of Diving Instructors
SSI
Scuba Schools International
NAUI
National Association of Underwater Instructors
CMAS
Confédération Mondiale des Activités Subaquatiques
TDI / SDI
Technical & Scuba Diving International
BSAC
British Sub-Aqua Club
The recreational path
Discover Scuba Diving
Introductory experience, no certification, with an instructor.
Open Water Diver
The foundational certification. Includes theory, pool, and 4 open water dives.
Advanced Open Water
Five specialty dives: deep, navigation, and 3 electives.
Rescue Diver
Emergency prevention and management. Widely considered the most rewarding course.
Divemaster
First professional level. Can guide certified divers.
Instructor
Certified to teach and issue credentials.
Beyond recreational
Technical diving pushes beyond recreational limits: depths greater than 40m, mandatory decompression stops, gas mixes (Nitrox, Trimix, Heliox), redundant equipment, cave diving, and penetration of wrecks.
Common technical certifications include Nitrox (enriched air), Advanced Nitrox, Decompression Procedures, Extended Range, Trimix, and Full Cave. Each level requires specialized equipment and substantial training commitment.
Technical diving is not a "next" progression from recreational — it's a different discipline with its own mindset, risks, and rewards.
Frequently asked questions
Q01
How much does it cost to get Open Water certified?
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How much does it cost to get Open Water certified?
It varies by country: from ~$300 USD in Southeast Asia to ~$800 USD in Western destinations. The course typically takes 3–4 days.
Q02
Are PADI, SSI, and NAUI certifications interchangeable?
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Are PADI, SSI, and NAUI certifications interchangeable?
Yes. Certifications are recognized across agencies — you can dive with any operator regardless of which agency issued your credential.
Q03
Can I take the course online?
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Can I take the course online?
The theory portion (eLearning) yes. Pool sessions and open water dives must be completed in person with a certified instructor.
Q04
Do certifications expire?
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Do certifications expire?
No. Your certification is for life. However, if you haven't dived in 6–12+ months, a refresher course (Scuba Review) is recommended.