The TDI Intro to Tech course is the perfect course for divers who have heard about technical diving and want to find out more about this exciting branch of advanced recreational diving. This course walks students through the special techniques, planning procedures and skills that set technical diving apart from traditional sport diving. It will show them how to improve their dive planning methods, in-water skills and streamline their existing gear configuration, in a non-threatening and fun leaing environment. The specific skills this course will highlight are:
» Advanced Buoyancy Control
» Gas Management
» Situational Awareness
» Trim
» Gear Configuration and Selection
» Many More!

The TDI Advanced Nitrox Course qualifies divers to use enriched air nitrox from EAN 21 through EAN 100 to a depth of 40 metres/130 feet during dives hat 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. Advanced Nitrox is also a great course for those wanting to extend their bottom times in shallower depths such as scientific diver, and a must for SCR or CCR divers. The course cover topics like
» Equipment requirements
» Dive planning
» Oxygen tracking
» Blending methods

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 45m/150 feet, this course is your first step beyond the normal sport diving limits. Your TDI Instructor will provide you with valuable information and skills, among the topics covered are
» Kit set-up
» Equipment requirements
» Decompression techniques
» Decompression breathing gases
» Gas management
» Contingency planning

Certain areas of the world provide spectacular dives at depths deeper than 39m/130 feet but you will 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 55m/180 feet you wont have to miss those dives. The Extended Range course will cover topics and skills such as
» Equipment requirements and configuration
» Decompression options
» Use of surface marker buoys
» Buddy rescue
» Narcosis checks and management

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 m/200 feet with a blend of helium appropriate for the planned depth. The course covers topics and skills like
» Dive team planning
» Gas matching
» Cylinder labeling
» Surface marker deployment
» Equipment configuration
» Thermal protection options

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 m / 330 feet utilizing hypoxic levels of oxygen (below 17 percent). This course is perhaps one of the most informative and challenging and upon completion you are among some of the most elite divers. Your TDI Instructor will teach you
» Equipment management
» Multiple stage cylinder labeling and placement
» Complex decompression planning and contingency planning
» Dive team awareness and communication
» Gas monitoring and management
» Use of travel gasses

The Professional Scuba Association Inteational's Advanced Nitrox Diver course is designed for those divers who wish to utilize enriched air (Nitrox) at oxygen concentrations up to and including 100% by volume (EAN22 to Oxygen) in their diving activities including stage decompression procedures. This course involves limited decompression with one gas switch. It is highly recommended the Advanced Nitrox Diver candidates also take Narcosis Management - Level III in order to expand and enhance their ERD knowledge, skills and training, and to prepare them for required deco stops.

PSAI's Extended Range Nitrox course is intended for the diver wishing to dive to depths between 46m (150') and 55m (180') with extended bottom times. Stage decompression techniques are taught as decompression obligations are incurred for the extended depths and bottom times. This course primarily utilizes air as the bottom gas and nitrox and oxygen as decompression gases.

There is also an introduction to the use of Helium although the student will not be qualified to use Helium. This course may precede or be combined with Trimix Level 2 (Expedition) as a direct entry where there is documented proof of experience of Extended Range Nitrox Diving.

This course may be undertaken in the equipment of choice based on prior qualification.

PSAI Narcosis Management® training, the best in the world, has you perform only the underwater skills that relate to the actual real world of diving, keeping up with Depth, Air, Time and Awareness (DATA). You must become comfortable and competent with the mental and motor skills at each training depth before training down to the next level. The training you receive in this course, which covers equipment selection and configuration, dive planning and gas management, buddy awareness and dive execution is applicable to all levels of diving. Any diver, regardless of certification level from Open Water through mixed gas closed circuit rebreather will benefit from this course. PSAI is the only agency offering Deep Air training awareness down to 73 meters ~ (240 feet) taught in six levels. There are currently only ten instructors world wide qualified to teach to level VI.

Level I 30m (100') Level II 40m (130') Level III 46m (150')

Level IV 55m (180') Level V 61m (200') Level VI 73m (240')

This course provides the training required to competently and safely utilise breathing gases containing helium for dives that require staged decompression, utilising nitrox and/or oxygen mixtures during decompression to a maximum depth of 60 metres in conditions similar to or better than the assessment conditions. This course may be undertaken in the equipment of choice based on prior qualification.

This additional experience level assesses the experience and performance of the Trimix Diver and following successful assessment dives to within 3 metres of a target depth may be awarded a rating maximum of 75 metres in conditions similar to or better than the assessment conditions. In cases where there is documented proof of prior experience the Professional Instructor may combine level 1 and 2. This may be undertaken in the equipment of choice based on prior qualification.

This additional experience level assesses the experience and performance of the Level 2 Trimix Diver and following successful assessment dives to a maximum of 80 metres in Great Britain may be awarded a rating maximum of 100 metres in conditions similar to or better than the assessment conditions. Proof of successful involvement within the structure of well-run expeditions and an additional season's diving to build experience are typical of documented experience requirement. This may be undertaken in the equipment of choice based on prior qualification.