Photo: Robert Stansfield

All technical diving courses start in a shallow open water Cenote!

Divers UnderGround services include all the TDI Overhead Environments Diving and Mixed Gas diving courses. 

Technical Diving International (TDI) courses are an exhilarating move in your diving training and the next-level dive training for recreational divers. The cenotes between Playa del Carmen and Tulum provide the perfect conditions for beginner-level technical and cave diving training. 

Avid sport divers ready to go beyond the limits of single-tank diving, learn to execute dives in overhead environments, and plan deep decompression dives using high O2 and Helium mixes will love the knowledge and skills acquired during this course.

Once you have mastered your fundamental Sidemount skills and your rig is appropriately configured, you can add multiple tanks for extended bottom time. Learn to plan and execute technical decompression dives safely in pool-like conditions in the quiet Mexican Cenotes before going into more extreme environments.

You can take advantage of Divers UnderGround services by combining multiple TDI Courses. Combining the Decompression Procedures with the Advanced Nitrox and Sidemount Diver courses or Sidemount with Overhead Environments training saves you time and money! 

Ask us for details.

The Sidemount Diver course is the foundation of all other technical and Overhead Environments Diving training.

The TDI Sidemount diver course is a popular combination with Cavern Diver, Intro to Cave, and Full Cave Diver courses.

For confined water skills, we use Cenote Jardin del Eden (Closed Saturdays). Some training dives are in the deeper caves around Tulum.

Expand what you learned during your TDI Advanced Nitrox Course. Learn about TDI Decompression Procedures training and the proper management of high Oxygen mixes for technical dives.

After certification and practice, you will be ready to move into more advanced courses like the TDI Extended Range, Normoxic Trimix, and Advanced Trimix Diver.