Explore History Under the Sea — With Precision and PurposeElevate your wreck diving skills with advanced penetration techniques, navigation through tight wreck interiors, and proper use of guidelines. Learn risk management, gas planning, and mapping essentials that ensure safe and respectful exploration of submerged heritage sites. Dive deeper into the past—safely and expertly.

TDI Oxygen (O2) Equipment Service Technician Course allows candidates the ability to engage in the preparation of scuba equipment for the use and exposure of oxygen and other mixed gasses used in technical diving. The objective of this course is to train candidates in the proper procedures required for oxygen equipment cleaning.

TDI Advanced Gas Blender Course picks up where you left off in the previous sequence in training, the TDI Nitrox Gas Blender course. After successful completion of the TDI Advanced Gas Blender course, you will be able to engage in the blending of oxygen and helium based gases.

TDI Nitrox Gas Blender Course to find out how your cylinders get filled with nitrox! The TDI Nitrox Gas Blender Course will take you through the blending of nitrox in an easy-to-understand format.

You can take this course instead of the TDI Trimix course. It has one additional, more advanced, dive compared to the TDI Trimix course. This course does not give you credit for the Advanced Trimix course since there are no new skills introduced compared to the Trimix level.

TDI Advanced Trimix Diver Course is the top level of training for open circuit divers wishing to dive to depths as deep as 100 metres/330 feet utilizing hypoxic levels of oxygen (below 17 percent). This course is perhaps one of the most informative and challenging of all of the TDI open circuit courses.

TDI Trimix Diver Course could be your next step! As your motivation to explore progresses, you will find that you may want to go deeper to dive that wreck that is part of history or that cave system that you have read so much about.

TDI Extended Range course teaches you the proper techniques for utilizing compressed air as a breathing gas, and with a maximum depth of 55 metres/180 feet, so you don’t have to miss those dives! 

TDI Helitrox Diver Course examines the theory, methods, and procedures for planning staged decompression dives utilizing helium in the breathing mixture to reduce the effects of inert gas narcosis.

TDI Decompression Procedures Course combined with the TDI Advanced Nitrox course form the foundation of all other technical courses. After these two courses and some additional experience, the stage has been set for you to move onto additional technical levels.

The TDI Advanced Sidemount Diver Course, offers the same benefits as the TDI Sidemount Diver course but gives you the opportunity to dive with 2+ cylinders for extended dive times.

Advanced Nitrox Course qualifies divers to use enriched air nitrox from EAN 21 through EAN 100 percent within your current certification level to a maximum depth of 40 metres/130 feet during dives that do not require staged decompression.