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TDI Extended Range



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TDI Extended Rang is a specialty course intended for divers who do not have easy access to Trimix. It emphasizes skill development and solid procedures. Students will learn to use up two decompression gases, and how to safely dive in an Extended Range environment. Training dives in the TDI Extended Range are done on nitrox or air.

TDI Trimix

TDI Trimix certification opens new doors for divers. This certification gives divers more bottom time and allows them to dive up to 60 meters/200 ft. The Extended Range course is also available in eLearning form. TDI eLearning allows you to complete the course online if you are unable or unwilling to go to a local dive center. This course will teach you all about the benefits of extended range diving.


The Extended Range course can help you dive in more challenging places and reduce your nitrogen addiction. You will learn how to plan stage decompression dives using up to two stage bottles, enriched air, or oxygen. The Extended Range course may also be combined with TDI Trimix Diver Certification.

TDI Trimix training is designed to prepare you for advanced and safe diving. TDI Trimix training focuses primarily upon safety and skill building, as it is necessary to quickly address problems at depths of up to 60 meters. To achieve this, divers need to feel at ease with procedures that will help prevent complications.


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TDI Extended Range