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Technical Diving International


Technical Diving International was one of the first agencies of its kind. It’s focus was and still is on providing training materials and education for specialized diving situations ranging from Nitrox to Closed Circuit Rebreathers, as well as for overhead environments such as caves and wrecks.

What is Technical Diving
Technical Diving International (TDI) distinguishes a sport dive from a technical dive as any dive involving decompression, additional cylinders, alternative breathing gases, rebreathers, or overhead environments such as wrecks, caves or mines. This definition does not define a strong line between the semantical differences of “recreational” and “technical” as both styles of diving are recreational (for fun) and require similar equipment.

Your Technical Training Solution
The Technical Diving International (TDI) diver training program is straight forward, proven effective and offers divers a comprehensive path from Intro to Tech™ to Advanced Trimix. Formed in 1994, TDI has built a reputation for a complete curriculum that includes cavern to full cave, decompression diving, trimix, and wreck penetration training. We also offer four levels of diver certifications on closed-circuit rebreathers to a depth of 100 metres or 330 feet. Round these offerings off with programs for gas blending and preparing equipment for oxygen service and the program selection is complete. Simply put, TDI is a one-stop technical training solution that you will not out-grow.

Applications to Suit All Conditions and Environments
Technical Diving International believes that local conditions demand local knowledge. While our programs are structured to deliver a solid understanding of technical diving and develop skills that are universally applicable, our instructors are encouraged to go beyond the minimum allowable to produce courses that account for, and that are tailored to, location specific environments. For example, diving in the North Atlantic may require a different approach than drift diving in the warm waters of Indonesia. Our training makes sure you are qualified as well as certified. Should you desire a career as a dive professional, TDI & Scuba Diving International (SDI) offer: Divemaster (DM), Assistant Instructor (AI), Instructor, IT Staff Instructor and Instructor Trainer (IT) at the professional level.

Largest Technical Diving Agency in the World
Technical Diving International is the largest technical diving agency in the world. Its courses and certifications are recognized everywhere as the gold standard by which others are measured. International Training has more than 24 regional offices worldwide and through its sport diving sister agency, Scuba Diving International, it is associated with many leading industry groups such as the Recreational Scuba Training Council (RSTC) USA, Canada and Europe; the European Underwater Federation (EUF); and the International Organization for Standardization (ISO). Your card, and most of all your training, will be recognized and respected the world over!

TDI’s Innovation
By training with Technical Diving International, you are plugged into the most innovative educational system in the diving industry. Above all else, this means your training will include what’s happening in the technical diving community NOW. Technical Diving International was:

First to present nitrox training in a simple format that required no dives to complete.
First to present an advanced wreck program teaching overhead diving techniques outside the cave diving format.
First to make trimix training accessible to recreational divers.
First to have a technical divemaster certification.
First to offer online courses including leadership programs like TDI Divemaster. The online academics and preparation for these programs allow you more “in-water” quality time!
First to make certification cards available directly through your participating dive center.

Membership Has its Perks
With Technical Diving International (TDI) you are part of an organization that is making advanced diving more accessible and more fun. Our Intro-to-Tech™ program puts technical diving’s adventure within the reach of a whole new community of dive enthusiasts.

Respectful Service
We grew to be the leader in technical diving by taking care of our instructors and the divers they teach, pure and simple. Our organization was founded on the respect for the value of good education and customer satisfaction. We take that very seriously. If you need help with a lost c-card, a training issue or have a question about our programs, we are only an email or phone call away. During business hours our phones are answered by live customer service representatives, this means you will get answers fast.

The Best Instructors
TDI Instructors are among the best in the industry. Since the very start of the agency, our instructor list has read like a “Who’s Who” of Technical Diving. Today, that elite team of Instructors and Instructor Trainers are pushing the envelope on all seven continents. Learn from the professionals who are diving the dream.

Dive with the Pros
Through our monthly Member’s Newsletter and TDI Newsletter you will learn about some of the most exciting dive destinations in the world. You can then book your exotic dive vacation through your local TDI/SDI facility. These guided trips feature once in a lifetime diving on luxury liveaboards, from the South Pacific to the Arctic. Each trip has a special theme and all are lead by experts in the field.

Take the Lead with Technical Diving International Technical Diving International™ (TDI) has a well developed leadership development program for experienced instructors and technical divers who want to step up to the next level of diving. Make TDI part of your future.