NAUI Technical Decompression Diver Course (Advanced Nitrox/Decompression Procedures)

What will you learn?

Decompression diving isn’t just setting a dive computer, seeing deco and calling yourself a tech diver, there is a lot that goes into becoming a technical diver, both mentally and physically and the NAUI Technical Decompression Diver Course is the most through mid range technical diving course.

Technical 1 Divers doing a Helitrox Dive on Dufferin Wall in Tobermory, Ontario

Through our classroom and watermanship teachings, you’ll learn what technical diving is, advanced decompression theory, dive planning, gas management, decompression gas planning, as well as tracking both CNS and Pulmonary Oxygen toxicity.

You’ll learn how to follow a decompression schedule, handle emergencies, contingencies, plan for over staying your dive plan and ensuring you have enough gas to safely get yourself back up to the surface.

Decompression is a course requiring sound thinking and judgement. Decompression divers cannot simply ascend when they have a problem.  All issues must be solved underwater, especially with a decompression ceiling above you.


Naui Intro to Tech
Advanced Nitrox
50 logged dives
Physically Fit
Comfortable in the water


This course is available privately for individuals or groups as well either locally or wherever you are located.

Your training will include a minimum of 7 dives including planning and executing staged decompression dives conducted over a 4-7 day period or over 2 long weekends.

Training Agency:


Additional Details:

Technical Decompression dives will be conducted on air/nitrox to a maximum depth of 40 meters/130 feet, or up to 170′ for those divers wishing to participate in the Helitrox Diver upgrade as a combined class with minimum of 10 dives.

Divers can benefit from a clearer head, due to reduced narcosis and CO2 loading, maximizing gas elimination  gradients and hyperoxic decompression.

This course is your first step beyond the normal recreational sport diving limits.

This course introduces the prospective technical diver to many essential skills which will become instinct in a real technical diving environment. Some examples include: Emergency procedures and Failure drills, Gas Management, Bail out and Contingencies, Proper buoyancy and Fin Technique introduced during your Into to Tech Course, proper gas switches not exceeding MOD and more.

The Prospective Technical Diver must have the proper mind set and educational background and experience level to become a SAFE technical diver. Remembering that the technical diver cannot just simply surface in an emergency situation.

If you’re interested in this program a CD is available upon request with a wealth of information

Students will be expected to have maintained their skills at a level of at least NAUI Intro To Tech prior to the Start of this intensive training process or above.

Students will have to show up ready to dive properly and dive well or you will not pass this course.  All foundation skills must be completed with proper trim, buoyancy, time requirements and in the right gear configuration.

Cost:  $799+HST NAUI Technical Decompression Diver.

$1200 Technical Diver Level 1 (Tech Nitrox, Deco, Helitrox).

Course cost includes Certification Fee, Student CD, online TDI eLearning code or Student Manuals.

Accommodations, Park Entrance Fees, Gas Fills, Transportation and Dive Charter Fees are Extra.

What gear will you need?

You’ll need a Technical Diver setup with double tanks, decompression bottle (properly rigged with MOD).  Gear is to be Simple and Streamlined, complying with equipment configuration requirements.  A full gear list will be given to all candidates.

Where do I go from here?

Here are some popular examples of courses commonly taken by graduates of this course:

  • Helitrox
  • Technical Wreck Penetration
  • Cave1
  • Cave 2
  • Trimix Level 1
  • Advanced Trimix
  • Extreme Exposure Trimix
  • CCR or pSCR Diver