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TDI Trimix Diver

TDI Trimix Diver

    • $1,199.99
      $1,199.99

Why train with us?

  • Low student to instructor ratios : 3 or 4 students per instructor both in the pool and ocean

  • Our retail store is located downtown.

  • Diving courses available all year-round. Private courses available.

  • We teach children 10 years and older.

  • Passionate team of Instructors and Divemasters who love to teach.

Our Technical Training Mindset :

Our first and foremost goal for our students is to create competent, safe, and knowledgeable divers who are truly capable of independently diving with a similarly-certified buddy, without the supervision or help of a guide.


We are generally very successful, and our alumni regularly dive together. However, understanding that to achieve this level of proficiency requires a huge amount of work, both on the part of the student and that of the instructor. 

Our courses are charged per a day of training, and students earn a certification when the instructor feels they have fulfilled TDI/SDI standards and those of Diving Sports standards. The number of days listed for the courses below are bare minimums, assuming the student does everything right the first time. It's always good to plan on leaving time for an extra day or two on your course.

What is Included in the Course :

Diving Sports includes the price of tuition, the scheduled class dates and 2 days of diving (2 dives each day), and certification fees. Students are responsible for their own equipment and enriched gas fills and helium for the course. Manuals, eLearning, or both will be added on afterwards depending on student preference.

Equipment Requirements :

Students are required to be proficient diving with 2 Primary cylinders, either backmounted doubles or sidemount, before the start of the course. Students will be required to have appropriate cylinders for a decompression mix with an oxygen cleaned regulators.

Trimix + Advanced Trimix:

Divers may combine the TDI Trimix Diver training with the TDI Advanced Trimix Diver training. The combination requires a minimum of 8 dives at a cost of $2199.99. Please reach out to us to arrange this option.

Who is this course for:

The TDI Trimix Diver course is designed for divers who have completed their initial technical diving training and want to explore further. The limiting factor for deeper and more complicated dives if often gas narcosis and oxygen partial pressure limits. The Trimix Diver training adds helium to your bottom gas mixture to effectively reduce the gas narcosis at depth as well as lowering the oxygen content to a minimum of 18%.

What You Will Learn:

You will spend the majority of the training focusing on dive planning with different gas mixtures with the introduction of helium as "norm-oxic" trimix. You will learn about isobaric counter diffusion and how it effects your dive planning. You will spend a significant amount of time on problem solving and system failures and how to properly execute back-up plans from deeper decompression dives.


Course Description:

We will spend 2 days in class. You have the option to do eLearning or purchase the manual only (this will affect the total material cost) so you may choose the option that is best for you. After finishing the class portion of the course we will be spending 2 days in the ocean, with 4 dives minimum. This is where you will build on the knowledge you learned during the first half of the course and develop your physical skill set as you work with your instructors and gain confidence as you become a trimix diver. If more dives are required to meet the instructors standards we will plan more days in the ocean as needed. Additional training costs are $400 per day plus gas fills.


Course Prerequisites:

  • Rescue Diver minimum
  • 100 logged dives, at least 35 dives in cold water in a drysuit.
  • Minimum of 30 dives deeper than 30m/100ft
  • Advanced Nitrox Certified
  • Decompression Procedures Certified
  • Extended Range Certified

  • Graduates Receive:

  • Certification to plan decompression dives to a maximum depth of 60m/200ft
  • Certification to dive with gas mixtures containing Helium to reduce the effects of gas narcosis
  • Certification to dive with reduced oxygen mixtures as low as 18%
  • Graduates may sign up for Advanced Trimix training following completion of the course
  • We are doing our part to try and reduce plastic use, so all of our certifications will be digital. If students would prefer a physical certification card, then they may pay to have one at the time of certification.

  • Please see our Cancellation and Refund Policy for Courses and Trips here:

    Cancellation and Refund Policy

    Commitment to Safety and Enjoyment

    At Diving Sports we believe in making sure all our students receive the highest quality instruction and customer service. We are in the business of training, mentoring, and supporting students to become safe, skillful and confident divers. We begin by scheduling our courses with the number of classes it typically takes most students to master the knowledge and skills, then adapt and tailor our schedule to fit our individual student’s needs. Our instructors are open and honest about your progress during each part of the course. Students may need to schedule additional pool or ocean training dives prior to certification. This ensures our students complete their courses with all the skills and knowledge they need to be safe and enjoy their future dives and courses. When you take a course with Diving Sports, you are welcomed into a passionate and inclusive community of divers eager to support your diving journey well beyond the duration of your class.

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