Technical Diving

Tec 45 TrainingPADI Tec 45 continues the PADI TecRec open-circuit pathway by moving divers beyond limited Tec 40 decompression into more complete staged decompression planning. The official PADI page describes Tec 45 as training divers to make...

Trimix I Diver TrainingNAUI Trimix I Diver is a technical course for certified technical decompression divers who want to use helium-based trimix breathing mixtures more safely. The official NAUI page states that the course prepares divers for dives to a...

Learn GUE Gas BlendingGUE Gas Blender is a support course for divers and dive-center staff who want to understand how breathing mixtures are prepared for GUE diving teams. The official GUE page frames gas blending as part of project and expedition...

Course OverviewTDI Nitrox is an entry-level enriched air course for divers who want to understand and use nitrox mixtures from 22 through 40 percent oxygen. The official TDI course page positions it as a way to continue diver education, extend...

Tec 40 TrainingPADI Tec 40 is the first major step in the PADI TecRec open-circuit decompression pathway. The official PADI page describes it as bridging recreational and technical diving, introducing limited decompression, gas planning, and tec...

Helitrox Diver TrainingNAUI Helitrox Diver is a technical course for divers learning to use helium-enriched EANx breathing mixtures for staged-decompression dives. The official NAUI page states that the course covers helium-enriched EANx mixes with 21%...

Course OverviewPADI Tec CCR Refresher is for certified Tec CCR divers who have not been diving their Type T CCR often enough to feel fully current. PADI describes frequent CCR diving as the best way to maintain skills and comfort, but the refresher gives...

Course OverviewTDI O2 Service Tech teaches the procedures required to prepare and maintain scuba equipment for oxygen exposure and technical mixed gases. The official TDI page describes oxygen equipment service as a critical responsibility in diving...

Prepare for Deeper DivesGUE Deep Primer is a focused step for divers who want to understand the added demands of deeper recreational diving before moving into more advanced training. GUE also labels the course as Triox Primer and explains that it may be...

Course OverviewPADI Tec CCR Qualifier is for certified Tec 40 CCR, Tec 60 CCR, or Tec 100 CCR divers who need to qualify on a different Type T CCR unit. PADI technical CCR ratings are tied to the specific rebreather used, so changing units requires...

Course OverviewTDI Advanced Mixed Gas CCR is the highest closed-circuit rebreather diver course that TDI offers. The official TDI page describes it as training divers to use the full capabilities of a CCR to a maximum depth of 100 metres/330 feet, with...

Expedition Trimix TrainingIANTD Expedition Trimix Diver training is the agency?s high-level open-circuit trimix pathway for divers already active in deep technical diving. The official IANTD page describes the program as training divers to conduct...

Course OverviewTDI Advanced Blender builds on Nitrox Gas Blender training and adds the preparation and blending of oxygen- and helium-based gases for technical diving. The official TDI page explains that successful graduates may engage in blending oxygen...

Course OverviewPADI Tec 100 CCR is the highest PADI Tec CCR diver rating and a major step beyond Tec 60 CCR. The course is built around planning and making Type T CCR dives using hypoxic trimix or heliox to a maximum depth of 100 metres/330 feet. At this...

Full Trimix TrainingIANTD Trimix Diver training is an advanced technical course for divers already involved in deep diving who need the planning discipline and gas knowledge to use trimix responsibly. The official IANTD page is clear that this program is...