Technical Diving International is the largest technical training agency in the world with over 5000 active instructors and regional offices in 32 countries worldwide. TDI offers a wealth of training courses aimed at divers wishing to go beyond the limits of recreational diving. From nitrox and decompression diving to trimix and rebreathers, TDI has a course to suit you...

Open Circuit Courses

This course examines the use of EAN 21 through 100 percent (oxygen) for optimal mixes to a depth of 150 fsw / 45 msw. The objective of this course is to train divers in the benefits, hazards and proper procedures for utilizing optimal mixes for dives not requiring staged decompression. Decompression Procedures may be combined with this course at the discretion of the instructor.

This course examines the theory, methods and procedures of planned stage decompression diving. The objective of this course is to train divers how to plan and conduct a staged decompression dive not exceeding a maxium depth of 150fsw / 45msw unless taught in conjuction with Advanced Nitrox, Extended Range or Advanced Wreck Courses. The most common equipment requirments, gear set-ups, decompression techniques and decompression mixtures (including oxygen and nitrox) are presented.

This course provides training and experience required to competently utilize air for dives up to 180 fsw / 55 msw that requires staged decompression, utilizing Nitrox mixtures or oxygen during decompression. The objective of this course is to train divers in the proper techniques, equipment requirements, and hazards of deep air diving to a maximum of 180 fsw / 55 msw utilizing Nitrox mixtures or oxygen for staged decompression.

The TDI Entry Level Trimix Course provides the training required to competently and safely utilize breathing gases containing helium for dives that require staged decompression, utilizing Nitrox and / or oxygen mixtures during decompression to a maximum depth of 200 fsw / 60 msw. The objective of this course is to train divers in the benefits, hazards and proper procedures of utilizing custom oxygen / helium / nitrogen mixtures as breathing gases.

The TDI Advanced Trimix Course provides the training required to competently and safely utilize breathing gases containing helium for dives that require staged decompression, utilizing Nitrox and / or oxygen mixtures during decompression to a maximum depth of 300 fsw / 91 msw. The objective of this course is to train divers in the benefits, hazards and proper procedures of utilizing custom oxygen / helium / nitrogen mixtures as breathing gases.
TDI Rebreather Courses

TDI Atlantis/Dolphin SCR £350

This is the entry-level certification course for recreational divers wishing to utilize one of the Semi-closed circuit Dolphin, Ray or Azimuth Rebreathers. The objective of this course is to train recreational divers in the benefits, hazards and proper procedures for using SCR Rebreathers.

This is the entry-level certification course for recreational divers wishing to utilize the Inspiration or Evolution closed circuit rebreathers. The objectives of the course is to train recreational divers in the benefits, hazards and proper procedures for rebreather diving on the Inspiration or Evolution CCR and to develop basic rebreather diving skills appropriate to diving within the normal recreational depth limits of 130 fsw/40 msw using an air diluent for minimal decompression.

Upon successful completion of this course, graduates may engage in diving activities utilizing the Inspiration rebreather to a maximum depth of 130 fsw/40 msw, utilizing an air diluent with safety/deco stops at 20 fsw/6 msw to a maximum of five minutes duration.

This is the highest level certification course for divers wishing to utilize the Inspiration or Evolution closed circuit rebreathers for mixed gas diving. The objective of this course is train recreational divers in the benefits, hazards and proper procedures for mixed gas rebreather diving on the Inspiration CCR and to develop advanced rebreather diving skills appropriate to technical diving to depths greater than the recreational limit of 130 fsw/40 msw.

Upon successful completion of this course, graduates may engage in technical diving activities utilizing the Inspiration or Evolution rebreathers to a maximum of 200 fsw/60 msw, utilizing any diluent appropriate to the dive plan. In order to enrol, candidates must have logged a minimum of 100 rebreather hours distributed over a minimum of 100 dives on the Inspiration, 50 of which must be deeper than 66 fsw/20 msw.

This is the entry level certification course for recreational divers wishing to utilise the Jetsam Technologies KISS Closed Circuit Rebreather. The objective of this course is train recreational divers in the benefits, hazards and proper procedures for rebreather diving on the KISS CCR and to develop basic rebreather diving skills appropriate to diving within the normal recreational depth limits of 40 meters for no decompression diving.

Upon successful completion of this course, graduates may engage in dives utilising the KISS rebreathers to a maximum depth of 40 msw, utilising normoxic O2 content diluents. Diluents may consist of air or helium based mixtures provided they are breathable to the surface.

More information coming soon...

Overhead Courses

TDI Cavern Diver £POA

This course is designed to develop the minimum skills and knowledge for cavern and overhead environment diving within the limits of light penetration; in addition outlines specific hazards associated with cave diving. The cavern course is not intended to provide instruction for cave diving environments.

This course is an introduction to the basic principles of cave diving utilizing a single primary guide line. Introductory cave diving is the second level in the development of safe techniques for cave diving, directly building upon the cavern diver course. This introduction to cave diving is not intended to train divers for all facets of cave diving. The objective of this course is the perfection of skills taught in the cavern diving program, in addition to the adoption of additional techniques and procedures required for elementary cave dives.

This course is the third (3rd) stage of training in the series of TDI£s cave diver development program. Advanced cave dive planning, the practical execution of different types of cave systems and scenarios divers encounter are presented. This cave diving course is not intended to prepare divers for evaluating all facets of cave diving. The objective of this course is to expand and critique previous skills accomplished in the Cavern and Introductory Cave Diving programs. Emphasis is placed upon dive planning and skill perfection through actual cave penetration.

This course provides training and experience to competently conduct advanced wreck dives. This program includes penetration skills and techniques. Depths shall not exceed the level in which the diver is trained and competent, but in no case shall the maximum depth in this program exceed 180 fsw (55 msw). The objective of this course is to train divers in the proper techniques, equipment requirements and hazards of wreck diving.

TDI Gas Blender Courses

TDI Nitrox Gas Blender £100

This course provides the training required to allow candidates to competently and safely 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.

The objective of this course is to train candidates in the proper procedures needed for the preparation and blending of high quality oxygen and helium-based diving gasses.