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Technical Courses

Technical Nitrox

The Technical EANx (Nitrox) Diver course will provide you with the skills and knowledge needed to minimize the risks of utilizing optimal breathing gas EANx mixtures of 25% through 80% (oxygen) for dives to a depth of 130 fsw / 40 msw not requiring stage decompression, using 80% EANx for decompression and 25% to 60% EANx for bottom mix.
Your instructor can combine this course with the Decompression Techniques Diver Course with additional training and dives. You’ll need to be 18 and have a minimum certification of NAUI EANx Diver and Deep Diver (or equivalent) and 50 logged dives with 10 dives on EANx to enroll in the Technical EANx Diver course.
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Intro to Tech

The Introduction to Technical Diving Course (Intro to Tech) is designed as a bridge from the recreational diver to an introduction to the rigors and discipline of technical diving, and is a great preparatory course if you are considering technical diver training or interested in streamlining your equipment configuration.
Your NAUI Intro to Tech instructor will introduce you to dive planning, physics and physiology, decompression, and decompression associated with technical diving. The NAUI Technical Equipment Configuration (NTEC) course may also be available as part of your Intro to Tech course or as a separate technical course.
The Intro to Tech course is your first step to a whole new world of technical diving!
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Helitrox

The Helitrox Diver course teaches you how to plan and execute Helitrox-based dives that may require stage decompression and utilize EANx and/or oxygen for stage decompression. This course is designed to teach you the hazards of utilizing Helium for dives to a maximum depth of 150 fsw / 46 msw that may require stage decompression, utilizing EANx mixtures and/or oxygen during decompression.
During your training, you’ll complete at least four open water dives using a Helitrox mixture (26% oxygen / 17% helium) of which at least one will be a repetitive dive. Your NAUI Technical Instructor may combine your Helitrox course with the Decompression Techniques Diver Course, with additional training and certification dives.
Your studies will include the knowledge necessary to plan and safely execute Helitrox dives including gas needs and requirements, oxygen toxicity limitations, nitrogen narcosis limitations, and emergency planning, including omitted decompression, oxygen toxicity, decompression sickness, and equipment failure.
Topics covered will also include emergency and contingency procedures, entry and descent techniques; inert gas narcosis and oxygen toxicity; variable ascent-rate techniques and deep-stop models; diver trim, ballast and buoyancy compensation; tethered or untethered decompression methods; shore or boat based dive team support and chamber locations; communications and emergency breathing gases; and NAUI Technical Equipment Configuration (NTEC).
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Decompression Techniques

As you continue your technical diver training, one of the courses you’ll want to take is Decompression Techniques, in which you will gain a working knowledge of the theory, methods and procedures of planned stage decompression diving. Your training will include a minimum of six dives including planning and executing a standard stage decompression dive less than 130 fsw / 40 msw.
Your instructor will also teach you equipment requirements including team requirements and NAUI Technical Equipment Configuration (NTEC), and decompression breathing gas mixtures (including oxygen, Helitrox, and EANx). You’ll learn the practical skills and knowledge you need for decompression diving within course parameters.
If you are 18 years of age, posses at least NAUI Master Scuba Diver, Deep Diver Specialty, Technical EANx Diver and Helitrox Diver certifications (or their equivalents), and have 75 logged dives, you may enroll in the Decompression Techniques course. With additional dives and training, your instructor may opt to combine this course with Technical EANx (Nitrox) Diver or Helitrox Diver.
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Heliair

The NAUI Heliair Diver course provides the training and experience you need to competently plan and execute extended range dives that require stage decompression utilizing Heliair and EANx and/or oxygen. You’ll learn the hazards and proper use of Heliair for dives to maximum of 180 fsw / 55 msw that require stage decompression, utilizing EANx mixtures and/or oxygen during decompression.
This course may be combined with the Decompression Techniques Diver Course with additional dives and training. As with all courses, there are minimum requirements: for Heliair Diver, you must be 18 years of age; have logged at least 75 dives, (10 of which must be decompression dives in the environment in which the course is being taught); and be certified as a NAUI Technical EANx Diver, Decompression Techniques Diver unless combined with this course, and NAUI Helitrox Diver or equivalent thereof.
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Trimix

The Trimix Diver Course consists of two levels, Trimix Diver Level I and Trimix Diver Level II. These courses will give you the skills and knowledge needed to minimize the risks of utilizing helium-based Trimix breathing gas mixes for dives to a maximum depth of 250 fsw / 76 msw requiring stage decompression and utilizing EANx mixtures and/or oxygen during decompression.
Your Trimix Level I instructor will teach you to plan and execute technical dives that require stage decompression and utilize helium-based tri-mix breathing gas mixtures and EANx and/or oxygen for stage decompression to depths above 200 fsw / 61 msw. In your Tri-mix Level II course, you will learn how to safely extend your diving depths down to no greater than 250 fsw / 76 msw.
To enroll in either Trimix course, you must be certified as a NAUI Decompression Techniques Diver and Technical Helitrox Diver or equivalent, and have a minimum of 100 logged dives 20 of which must have been decompression dives.
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Semi-Closed Circuit Rebreather

The Semi-closed Circuit Rebreather Diver course will provide you with the skills and knowledge you need to minimize the risks of using Semi-closed Circuit Rebreathers (SCR) to a maximum depth of 100 fsw / 30 msw and while using Nitrox mixtures of 32% to 80% oxygen.
Semi-closed Circuit Rebreathers used for NAUI certification courses must have been independently tested before training on a specific model can be authorized.
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Closed Circuit Rebreather

The Closed Circuit Rebreather course provides the NAUI EANx certified diver with the training and experience necessary to understand the hazards and minimize the risks of using a closed circuit rebreather while breathing Nitrox with a constant oxygen partial pressure.
This no-stop decompression course is designed to provide you with the skills and knowledge needed to minimize the risks of using Closed-circuit Underwater Breathing Apparatus to a maximum depth of 100 fsw / 30 msw.
Closed-circuit Underwater Breathing Apparatus used for NAUI certification and training must have been independently tested for authorization of training on a specific model.
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Closed Circuit Mixed Gas Rebreather

NAUI’s Closed Circuit Mixed Gas Diver course will to provide you with the skills and knowledge needed to minimize the risks of utilizing helium-based or trimix breathing diluent gas mixes for diving, with dive parameters to a maximum depth of 250 fsw / 76 msw requiring decompression with rebreathers and constant PO2.
Your training will include dive planning limits based on gas consumption of bailout stages, oxygen exposures, inert gas loading and breathing gas mixtures; navigation, diver rescue and management of a diver experiencing oxygen toxicity; ascents with ascent reel and lift bag; and stage decompression.
The Closed Circuit Mixed Gas Diver course is an intensive class that requires previous certifications in NAUI Decompression Techniques, Heliair, and Closed Circuit Rebreather (CCR) or the equivalents thereof, plus a minimum of 100 logged hours on a Closed Circuit Rebreather, 60 hours of which are directly on the specific CCR for mixed gas training.
Your training will include analyzing of breathing gas mixtures; buoyancy control skills; scuba diver rescue simulation to including management of a diver experiencing underwater convulsions, hypoxia, flooded system, and out of breathing gas scenarios; training in redundant breathing gas systems; proper counter lung flush procedures; and ascent with a line reel and lift bag while simulating a required decompression stop. Additional topics covered in your course include proper post dive procedures, physics and physiology, equipment; review of dive tables including RGBM tables, narcosis depth, dive planning requirements and gas management planning.
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Mixed Gas Blender and Oxygen Service Technician

If you want to prepare EANx breathing gas mixtures for use by divers, sign up for the Mixed Gas Blender and Oxygen Service Technician course. This is a great course if you plan to work in a dive center and need additional training, or wish to expand your knowledge of diving gas mixtures.
In it, you’ll gain the skills and knowledge needed to safely handle high pressure gases and prepare Nitrox breathing gas mixtures for use by divers. You’ll analyze the resulting breathing gas mixtures from your own breathing gas blending practice and master the breathing gas blending system used in training.
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