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  • TDI Courses

    Technical Diving International Core Courses

    • Intro to Tech

      The TDI Intro to Tech Course is an introductory course that expands on recreational training by improving dive planning methods, in-water skills, and streamlining existing gear configurations in a controlled and fun learning environment.
    • Nitrox

      TDI Nitrox Diver Course is an entry level course for divers wishing to continue their diver education and utilize enriched air nitrox as a breathing gas to extend no decompression limits at depth.
    • Advanced Wreck

      The TDI Advanced Wreck Diver Course is the next step for any diver that has successfully completed the SDI Wreck Diver Course. During this course, your TDI Instructor will teach you the proper techniques for locating and planning an advanced penetration dive. The advanced wreck course is commonly taught with other popular TDI courses such as Advanced Nitrox, Decompression Procedures, Extended Range, Closed Circuit Rebreather, and Trimix.
    • Sidemount

      The TDI Sidemount Diver Course is the ideal specialty for any diver wishing to use this increasingly popular equipment configuration; either as a stand-alone course OR in conjunction with one of TDI’s other open circuit technical specialties such as Decompression Procedures, Extended Range, Trimix, Advanced Trimix, and Advanced Wreck. If this course is combined, the requirements for BOTH courses must be met. The TDI Sidemount Diver course teaches students how to utilize side-mounted primary cylinders as an alternative to the traditional back-mounted method.

    • Diver Propulsion Vehicle (DPV)

      The purpose of the TDI Diver Propulsion Vehicle (DPV) Course is to familiarize divers with the skills, knowledge, planning, organization, procedures, techniques, problems, and hazards of using DPV’s while technical diving. Upon successful completion of the TDI Diver Propulsion Vehicle Specialty training, the student will be able to: demonstrate comprehension of the practical knowledge necessary for DPV diving, properly plan and safely conduct DPV dives, and implement techniques and procedures to manage and minimize DPV diving hazards.

    • Semi Closed Rebreather

      This is the entry-level certification course for recreational divers wishing to utilize a TDI approved semi-closed circuit rebreather (SCR). The objective of this course is to train sport divers in the benefits, hazards and proper procedures for using a SCR.
    • Advanced Nitrox

      Are you looking to expand your dive time? Maybe you’re a scientific diver or photographer looking to stay in the water a little longer? The TDI 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. Often taught in conjunction with the TDI Decompression Procedures course, this can be considered the foundation of your technical diving career. TDI Advanced Nitrox is also a must for SCR or CCR divers.
    • Decompression Procedures

      Are you finding your no- decompression limits (NDLs) a limiting factor to dives? Do you have to ascend sooner than you would like? As sport divers, planned decompression is not something that we do or have been taught. The TDI Decompression Procedures Course prepares you for planned staged decompression diving. With a maximum operating depth of 45 metres/150 feet, this course is your first step beyond the normal sport diving limits. The 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.
    • Helitrox

      The 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.

      The TDI Helitrox Diver Course trains divers how to plan and conduct staged decompression dives to a maximum depth of 45 metres/150 feet. The most common equipment requirements, gear set-up, and decompression techniques are also presented during this course. Students are permitted to utilize enriched air nitrox and helium mixes with no greater than 20% helium content, and up to 100% oxygen for decompression diving.

      This program is designed as a stand-alone course, or it may be taught in conjunction with TDI Advanced Nitrox at the discretion of the instructor.

    • Trimix

      Are you looking to expand your depth range? Do you want to reduce narcosis during deep dives? The 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. One of the major limiting factors of going deeper is narcosis; TDI’s Trimix Diver course shows how to minimize the effects of narcosis by adding helium to offset the nitrogen in your breathing gas. While taking the Trimix Diver course your TDI Instructor will teach you how to plan and execute dives utilizing as little as 18 percent oxygen and diving to maximum depth of 60 metres/200 feet with a blend of helium appropriate for the planned depth.
    • Extended Range

      Certain areas of the world provide spectacular dives at depths deeper than 39 metres/130 feet but you may not have access (or very limited access) to helium. The 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!The TDI Extended Range Diver Course provides the training and experience necessary including proper techniques, equipment requirements, and hazards of deep air diving, to competently utilize air for dives up to 55 metres/180 feet that require staged decompression, using nitrox mixtures or oxygen during decompression.
    • Advanced Trimix

      The 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. Upon completion, you will be among some of the most elite divers, capable of doing and seeing more while diving than any other divers out there.
    • Nitrox Blender

      Have you ever wondered how your nitrox cylinders are filled? Do you like the “behind the scenes” look at what makes a dive happen? Take the 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. This course provides the training required to competently blend nitrox gas. The objective of this course is to train candidates in the proper techniques, equipment requirements and hazards involved in blending nitrox gases for recreational scuba diving activities.
    • Advanced Nitrox Blender

      Are you ready to progress on as a Gas Blender? The 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. The objective of this course is to train candidates in the proper procedures needed for the preparation and blending of high quality nitrox and trimix gases for use in technical diving. The TDI Advanced Gas Blender course will take you through this process in an easy-to-understand format.

    • O2 Service Tec

      The 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. This course may be combined with the Visual Inspection Procedures course at the discretion of the Instructor.
    • TDI Non-Diving Specialty Inst.

      The TDI Non-Diving Specialty Instructor Course is designed to teach members of the scuba diving industry such as: store owners, service technicians, etc. the knowledge to safely function as an independent instructor of the non-diving specialties listed below:

      • Visual Inspection Procedures
      • Other non-diving specialties, i.e. unique specialties, offered by TDI (subject to headquarter’s approval)

      In order to become an instructor for one of the above courses; a candidate must be certified by a qualified instructor trainer; experience based upgrades are not available. Instructors who hold equivalent certifications with a recognized agency and wish to cross over as a non-diving specialty instructor may do so by applying via current instructor crossover procedures.

    • TDI Dive Master

      The TDI Divemaster Course is the first professional level certification in the TDI leadership levels. During this course you will be challenged and learn what it is like to work with divers as they begin or continue their technical diving experiences. You will learn how to manage divers, work as land or boat support, and conduct enjoyable dives. Dive physics, physiology, how conduct pre-dive briefing, how to assist technical instructors as well as how to be a professional TDI Divemaster is all part of the course. Your skills will be refined to demonstration quality and your knowledge increased to that of a technical diving professional.
    • TDI Instructor

      Are you an experienced dive instructor and passionate technical diver, and do you want to join the ranks of some the top technical diving instructors in the world? Get started with a TDI Instructor Course. Starting at the entry levels, you will learn the fundamentals skills, requirements and be evaluated on proper techniques for conducting technical diver courses. As you gain teaching and diving experience, you will qualify to enter higher level instructor programs.
  • TDI Rebreather Courses

    Technical Diving International Rebreather Courses

    • Air Diluent CCR

      The TDI Closed Circuit Rebreather (CCR) Air Diluent Diver Course is your first step into closed circuit rebreather diving and your first truly quiet dive experience! Using the latest technology in CCRs can maximize your gas supply and provide an optimum breathing gas for any depth by maintaining a constant partial pressure of oxygen. It’s like having a nitrox blending machine on your back! During this course, your TDI Instructor will teach you all of the necessary skills to conduct no decompression CCR dives to a maximum depth of 30 metres/100 feet using air diluent.
    • Air Diluent Deco-CCR

      Are you an open circuit technical diver looking to cross over to the “silent” side? Or maybe you are a CCR Air Diluent Diver looking to progress to the next level? Either way, TDI’s CCR Air Diluent Decompression Course is the next step. Using the latest technology in CCR’s can maximize your gas supply and provide an optimum breathing gas for any depth by maintaining a constant partial pressure of oxygen. Like having a blending station on your back, a CCR is the ultimate tool for technical divers.

      During this course, your TDI Instructor will teach you all of the necessary skills to conduct decompression CCR dives to a maximum depth of 45 metres/150 feet using air diluent.

    • Helitrox CCR

      This is the second level certification course for divers wishing to utilize a Closed Circuit Rebreather (CCR) for mixed gas diving using a Helitrox Diluent. The objective of the course is to train divers in the benefits, hazards and proper procedures for diving a CCR and to develop basic CCR diving skills, to a maximum of 45 metres/150 feet, using an air/nitrox/helium diluent for formal decompression diving. Students are permitted to utilize a diluent and bailout mix with no greater than a 20% helium content and no less than a 21% oxygen content, and are permitted to use up to 100% oxygen for decompression.

    • Mixed Gas CCR

      As a TDI CCR Air Diluent Decompression or Helitrox Diluent Decompression Diver, the TDI Mixed Gas CCR Diver course is your next step into closed circuit rebreather diving, it is your opportunity to explore a little deeper. Using the latest in technology CCR’s maximize your gas supply and provide the optimum breathing gas for any depth by maintaining a constant partial pressure of oxygen (PPO2). During the dives your TDI Instructor will teach you all the necessary skills to conduct CCR dives utilizing helium as a diluent gas and oxygen levels as low as 16 percent to a maximum depth of 60 metres/200 feet.
    • Advanced Mixed Gas CCR

      The highest level of Closed Circuit Rebreather (CCR) training that TDI offers, the Advanced Mixed Gas Course will teach you how to use the full capabilities of a CCR. With a maximum depth of 100 metres/330 feet, this course opens up a whole new realm of diving including new wrecks, caves and walls to explore in depths you previously could not reach on a rebreather. This intensive course conducted over seven dives will focus on all the elements needed to plan and execute dives to these depths.