CMAS Trimix Normoxic

Extend your range of diving and discover more!

The CMAS Trimix Normoxic is the entry level course for anyone who wants to extend their diving range beyond the recreational depths. Having the chance to explore lakes and seas more in depth will take you to another dimension, giving you the possibility to visit beautiful walls, reefs or wrecks otherwise inaccessible to recreational divers.


The CMAS Trimix Normoxic course is designed to extend the skills already acquired in the previous courses and enhance them in order to practice deep diving always with comfort, confidence and competence. In this course you will learn how to plan a Trimix dive, starting from the logistic until the gas management and decompression strategies, and how to execute it in safe way. Going deeper means have to deal with a greater amount of equipment, such as double tanks and multiple decompression tanks: through the training and gradual experience you will be able to manage it always with proficiency and efficiency for execute direct ascents while doing decompression stops. You will also be trained to manage the potential emergencies and equipment problems that may occurs in these dives.

After you get the certification it will allows you to dive until 60 meters depth using Trimix Normoxic mixtures (until (18/45) with maximum two decompression tanks (EAN50 and O2).

Additional note: this course works perfectly if taken in combination with the CMAS Wreck Diver course. If wrecks are your interest, take in consideration the idea to attend a combo class!


The CMAS Trimix Normoxic course is usually conducted over six to eight days (full or half) and includes at least six training dives (preceded by land drills), three experience dives and four theoretical lessons conducted in classroom.


The course ends when the students have passed a written exam and have fullfilled all the pratical outcomes.

Pratical Info

In the course fee it’s included:

  • Instruction
  • Course book and teaching materials
  • Certification fees
  • Refills in EAN32 during the training dives
  • Refills in EAN50 for S80 deco bottle
  • Refills in O2 for S40 deco bottle
  • Refills in Trimix mixtures for the instructors
La tassa di corso non include:

  • Refills in Trimix mixtures for the students
  • Lunches
  • Eventual end-of-course trip to the sea

Every student must own the equipment required for practice technical diving. Feel you free to contact us in case of any doubt regarding it or to get the list about what’s exactly is needed.

Career Pathway

After you get the CMAS Trimix Normoxic certification you can continue your diving career by taking one of the following courses:


  • 18 Years Old
  • CMAS D3 or equivalent
    CMAS Tech Skills or equivalent
  • At least 150 dives
  • Medical certificate

Quick Info

  • CMAS Trimix Normoxic Diver
  • Maximum 60 meters
  • Trimix normoxic mixtures


Stella Del Curto

Stella Del Curto

CMAS Instructor I2
I’m Stella Del Curto, born in Locarno, Switzerland, the 27 December 1983. Since I was [...]
René Röösli

René Röösli

CMAS Instructor I3 (Germany)

“The best way to observe a fish is to become a fish” (Jacques-Yves Cousteau) The […]

Raffaele Mazza

Raffaele Mazza

CMAS Instructor I4
I’m Raffaele Mazza, born in Locarno, Switzerland, the 25 September 1968.   Diving Qualifications Diving [...]

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CMAS Trimix Normoxic Diver

Extend your diving range and discover more!