. Dive-Tech: Nitrox and Technical Diver Training

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TDI - Technical Diving International

TDI Introduction to Technical Diving
TDI Nitrox Diver
TDI Advanced Nitrox
TDI Decompression Procedures
TDI Helitrox
TDI Advanced Nitrox & Deco Procedures
TDI Advanced Nitrox & Helitrox
TDI Advanced Wreck
TDI Extended Range
TDI Entry Level (Normoxic) Trimix
TDI Advanced Trimix
TDI Gas Blender
TDI Advanced Gas Blender
TDI Combined Basic and Advanced Gas Blender


Technical Diving International (TDI) was formed in 1994 by some of diving's most experienced instructors to bring technical applications of the sport to a wider audience. TDI's library of training materials and texts have become known as the industry's best and most professional resources. Most importantly, TDI has the best safety record of all training agencies. With offices worldwide and over 10,000 instructors teaching our programs, TDI has become the largest international specialised dive agency.

TDI Introduction to technical diving


TDI Introduction to Technical Diving
This two day course is a new and welcome addition to curriculum of the world’s largest and most successful technical diving agency. Intro to Tech is intended to give experienced sport divers a simple, non-threatening glimpse at the techniques and skills used in technical diving. Participating in this course will give those divers a better understanding of the detailed planning and preparation required to make a successful and safe technical dive. Intro to Tech is really a try it before you buy it course for someone who has heard a lot about tech and is wondering what all the fuss is about. But Intro to Tech is also worthwhile for divers who have no real intentions to go on to take a full tech class because the skills it focuses on – gas management, superior buoyancy and trim, situational awareness, and equipment selection – are useful in any form of diving.

Includes: Instruction

Pre-requisites: Open water diver or equivalent, minimum 15 years of age.

Cost: £250

TDI basic nitrox


TDI Nitrox Diver
This half day entry level course is available to all divers who wish to explore the many advantages of Nitrox diving and begin to expand their horizons. The qualification allows the diver the use of Nitrox from 22% to 40%. The half day course covers the history of Nitrox, its advantages, and disadvantages, oxygen toxicity, equivalent air depths, maximum operating depths, nitrox computers and gas analysis. We provide manuals etc., no dives are involved unless you request them and all that is required by you is a calculator and some common sense.

Includes: TDI Nitrox manual & certification

Pre-requisites: Open water diver or equivalent, minimum 15 years of age.

Cost: £120
Basic Nitrox with 1 supervised dive £150

TDI advanced nitrox


TDI Advanced Nitrox Diver
This two day course, includes 4 nitrox dives (100 minutes bottom time) and covers all the topics in the nitrox course in much greater detail, with in-depth coverage of CNS & whole body oxygen toxicity and tracking, common mixing methods, best mix computations, dive planning, gas consumption calculations and equipment considerations, all culminating in certification to use 22% - 100% (oxygen) as a breathing gas.

Includes: TDI Advanced Nitrox manual & certification

Pre-requisites: Nitrox diver or equivalent, 25 logged dives, minimum 15 years of age.

Cost: £300

TDI basic advanced nitrox


TDI Decompression Procedures Diver
This two day course examines the theory, methods and procedures of planned decompression diving, including 4 dives. The program is designed as a stand alone course or it may be taught in conjunction with such TDI courses as Advanced Nitrox Course, Advanced Wreck Course, or Extended Range Course. The objective of this course is to train divers how to plan and conduct a standard staged decompression dive not exceeding a maximum depth of 45 msw (unless taught in conjunction with the Extended Range Course) The most common equipment requirements, gear set-up, and decompression techniques are presented, using nitrox or oxygen mixes within the divers existing qualification.

Includes: TDI Decompression Procedures manual & certification.

Pre-requisites: Advanced open water diver or equivalent, 25 logged dives, minimum 18 years of age.

Cost: £300

TDI advanced nitrox and deco procedures


TDI Helitrox Diver
This two day course examines the theory, methods and procedures of planned decompression diving using limited Helium mixes, including 4 dives. The program is designed as a stand alone course or it may be taught in conjunction with such TDI courses as Advanced Nitrox Course, Advanced Wreck Course, or Extended Range Course. The objective of this course is to train divers how to plan and conduct a standard staged decompression dive not exceeding a maximum depth of 45 msw (unless taught in conjunction with the Extended Range Course) The most common equipment requirements, gear set-up, and decompression techniques are presented, using helitrox, nitrox or oxygen mixes within the divers existing qualification.

Includes: TDI Decompression Procedures manual & certification.

Pre-requisites: Advanced open water diver or equivalent, 25 logged dives, minimum 18 years of age.

Cost: £300

TDI advanced nitrox and deco procedures


TDI Combined Advanced Nitrox & Decompression Procedures Diver
This four day course includes both the Advanced Nitrox and Decompression Procedures courses. It is more intensive, but more efficient. It includes 6 nitrox dives and covers all the topics required to use mixtures from 40% to 100% for decompression as well as the ability to perform accelerated decompression.

Includes: TDI Advanced Nitrox & Decompression Procedures manual & certification.

Pre-requisites: Advanced open water diver or equivalent, TDI Basic Nitrox or equivalent, 50 logged dives, minimum 18 years of age.

Cost: £550

TDI Advanced Nitrox & Helitrox Diver
This four day course includes both the Advanced Nitrox and Helitrox courses. It is more intensive, but more efficient. It includes 6 nitrox dives and covers all the topics required to use Helitrox mixtures with a Helium content of up to 20% to reduce narcosis as well as deco mixtures from 40% to 100% for decompression as well as the ability to perform accelerated decompression.

Includes: TDI Advanced Nitrox & Decompression Procedures manual & certification.

Pre-requisites: Advanced open water diver or equivalent, TDI Basic Nitrox or equivalent, 50 logged dives, minimum 18 years of age.

Cost: £550

TDI advanced wreck


TDI Advanced Wreck Diver
This 4 day 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 fifty five (55) msw. The objective of this course is to train divers in the proper techniques, equipment requirements and hazards of wreck diving

Includes: TDI Advanced Wreck manual & certification.

Cost: £550

TDI entry level normoxic trimix


TDI Extended Range Diver
Again a comprehensive four day course, with 100 minutes bottom time required to qualify. The course concentrates on the proper techniques, equipment requirements, and hazards of deep air (55 metres maximum) utilising nitrox and oxygen for accelerated decompression. The course places a great deal of emphasis on personal and team limits, shut down procedures, gas switching, DSMB deployment and contingency planning etc.

Includes: TDI Extended Range manual & certification.

Pre-requisites: Advanced Nitrox Diver and Decompression Procedures Diver or equivalent, 100 logged dives, of which 25 must be deeper than 30 msw. Minimum 18 years of age.

Cost: £600

TDI entry level normoxic trimix


TDI Entry Level (Normoxic) Trimix
This four day course provides the training required to competenly and safely utilize breathing gasses containing helium for dives that require staged decompression, utilizing nitrox and/or oxygen mixtures during decompression to a maximum depth of 60m.

Includes: TDI Entry Level Trimix manual & certification.

Pre-requisites: Advanced Nitrox Diver and Decompression Procedures Diver or equivalent, 100 logged dives, of which 25 must be deeper than 30 msw. Minimum 18 years of age.

Cost: £600 plus instructors gas and dives at cost.

TDI advanced trimix


TDI Advanced Trimix
This four day 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 one hundred (100) metres. 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.

Includes: TDI Advanced Trimix manual & certification.

Pre-requisites: Extended Range/Trimix Diver or equivalent, 100 logged dives, of which 25 must be deeper than 30 msw. Minimum 18 years of age.

Cost: £700 plus instructors gas and dives at cost.

TDI gas blender


TDI Gas Blender
This one day course teaches students the knowledge necessary for nitrox gas blending, a basic requirement if you are looking to blend nitrox in a club environment or if your looking for work in the diving industry.

Includes: TDI Gas Blender manual & certification.

Pre-requisites: Minimum 18 years of age.

Cost: £150

TDI advanced trimix gas blender


TDI Advanced Gas Blender
This one day course trains students to blend trimix and use advanced blending techniques including the use of Haskel pumps etc.

Includes: TDI Advanced Gas Blender manual & certification.

Pre-requisites: Minimum 18 years of age.

Cost: £150

TDI advanced trimix gas blender


TDI Combined Basic and Advanced Gas Blender
This one day course trains students both as a nitrox blender and an advanced gas blender which includes use of nitrox and trimix and Haskel pumps etc. This course teaches students the knowledge necessary for the full range of gas blending, a basic requirement if you are looking to blend nitrox in a club environment or if your looking for work in the diving industry.

Includes: TDI Basic and Advanced Gas Blender manuals & certification.

Pre-requisites: Minimum 18 years of age.

Cost: £200




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