SDI® + TDI®
- Modern approach — uses dive computers early.
- Strong path into advanced / technical training (TDI®).
- Great for divers who want practical, skills-first training.
PADI®, SSI® or SDI®?
The Diving Agency Explained
What is a Diving Agency?
A scuba diving agency is an organization that develops training programs and certifies scuba divers and instructors. These agencies set safety standards, offer courses, and issue certification cards to show a diver’s level of training and experience.
Major agencies include PADI®, SSI®, NAUI®, SDI®, TDI®, CMAS®, IANTD®, GUE® and RAID®.
Many dive centers and instructors—ours included—are affiliated with multiple agencies. This can be for various reasons, including flexibility, cost, course availability, or to better serve students from different backgrounds.
To a great extent, certifications across different agencies have equivalents and are largely interchangeable. A diver can begin their certification path with one agency and continue their education with another.
Which Diving Agency is Best?
If you’re looking to get certified as a scuba diver, the major agencies offer safe, internationally recognized training that qualifies you to dive anywhere in the world.
At Mammoth Lake Texas, we believe the most important factor is the instructor and your commitment—not just the agency name.
SSI®
- Strong digital learning tools and app-based materials.
- Courses are tied to affiliated shops.
- Great for structured training and continuing education.
PADI®
- Most widely recognized globally.
- Very consistent course structure.
- Great for travel and worldwide recognition.
DISCLAIMER: At Mammoth Lake Texas, we collaborate with several internationally recognized scuba training agencies. Each agency has its own structure, procedures, and administrative systems, yet all follow internationally accepted standards for diver training and safety. Any comparisons or opinions expressed on this website are based solely on our professional experience. Our collaboration or promotion of certain agencies does not constitute exclusive endorsement, nor does it imply any negative judgment toward other organizations.
