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Raid HYPOXIC TRIMIX OC course to 100 metres

Published: May 13, 2024 - 15:26
Updated: May 13, 2024 - 15:37
Raid HYPOXIC TRIMIX OC course to 100 metres


RAID, a leading global scuba diver training agency, is proud to introduce its groundbreaking Hypoxic Trimix Open Circuit course designed for technical divers seeking to push the limits of exploration to depths of up to 100 meters (330 feet). This advanced course, at the pinnacle of technical diver training, presents a unique challenge and opportunity for divers to venture beyond the conventional limits of recreational and technical scuba diving.

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The Hypoxic Trimix Open Circuit course is meticulously designed to cater to experienced divers aiming to expand their expertise into the realms of extreme depth by using gas mixtures with significantly reduced levels of oxygen. This specialized training is critical in mitigating the risks associated with deep technical dives, including oxygen toxicity and nitrogen narcosis, among others.

raid hypoxic
Divers exploring shipwreck in the Baltic Sea – Dive Raid

Course Highlights:

  • Two Certification Options: Divers can opt for the Limited Hypoxic Trimix Open Circuit Diver certification, allowing dives up to 80 meters (265 feet), or the full Hypoxic Trimix Open Circuit Diver certification for dives up to 100 meters (330 feet).
  • Advanced Skill Development: The course focuses on refining skills such as contingency planning, multiple gas switches, precision buoyancy control, DSMB deployment from depth, and comprehensive support planning.
  • Rigorous Safety Protocols: Participants will engage in extensive training on proper equipment setup, pre-dive checks, gas analysis, labeling, effective communication, and problem-solving techniques.
  • Expert Instruction: Delivered by seasoned instructors with unparalleled experience in deep technical diving, ensuring the highest standards of safety and education.

In line with RAID’s commitment to accessibility and education, the agency has made an unprecedented move to make its entire manual library, comprising over 120 titles, available for free. This initiative underscores RAID’s dedication to fostering a well-informed and safety-conscious diver community.

“We’re writing the future of diving, right now!”

explains Paul Toomer, VP of Product Development, emphasizing the innovative spirit of RAID’s approach to diver education.

About RAID:

RAID is a forward-thinking scuba diver training agency that emphasizes safety, quality, and environmental consciousness. With a presence in over 90 countries, RAID offers a comprehensive range of diverse training courses, from beginner to advanced technical levels.

For divers ready to take on the ultimate challenge and explore the depths like never before, the HYPOXIC TRIMIX OPEN CIRCUIT TO 100 METRES course by RAID offers an unparalleled opportunity. Interested parties are encouraged to contact their local RAID Dive Centre for more information and to enroll.

For the curious ones: What is Hypoxic Trimix

Hypoxic Trimix is a specialized gas mixture used in technical scuba diving to allow divers to reach and safely explore deep underwater environments, typically beyond recreational limits (deeper than 40 meters/130 feet). This blend consists of three gases: oxygen, nitrogen, and helium.

The term “hypoxic” refers to the reduced level of oxygen in the mix; the oxygen content is lower than the 21% found in atmospheric air. This reduction in oxygen concentration is crucial for deep dives to minimize the risk of oxygen toxicity, which can occur at high pressures under water when breathing normal or enriched air mixes. Oxygen toxicity can lead to serious health issues, including convulsions which, underwater, can be fatal.

Helium is added to the mixture to replace some of the nitrogen and oxygen. This helps reduce the effects of nitrogen narcosis—a condition often called “the rapture of the deep,” where nitrogen under high pressure causes a state similar to alcohol intoxication. It also decreases the density of the breathing gas, making it easier to breathe at depth, thereby reducing the work of breathing and potential CO₂ buildup.

The precise mix of oxygen, nitrogen, and helium in hypoxic trimix is tailored to the planned depth of the dive. Since the oxygen fraction is too low for safe breathing at shallow depths or on the surface, divers will switch to alternative gas mixes with a higher oxygen content when ascending and at shallower depths to ensure safety.

In summary, hypoxic trimix is an advanced tool for deep technical dives, enabling exploration at depths with reduced risks from oxygen toxicity and nitrogen narcosis, but it requires rigorous training and meticulous planning to use safely.

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About author

Marcin Pawełczyk
Marcin’s journey with diving has been an adventure. Starting as a recreational diver, he soon found himself drawn to the fascinating stories and mysteries of Baltic wrecks. After gaining experience, Marcin decided to go beyond just leisurely exploration and took his training up a notch by completing the TMX course, allowing him to explore even deeper and uncover the secrets of inaccessible places. His next challenge has been cave diving, where he is honing his skills to become a certified diver. Not content to simply take in the breathtaking beauty of underwater life, Marcin has also embraced underwater photography since 2018, capturing stunning shots that bring these worlds alive for those who are unable to experience them first-hand. Marcin’s passion for the underwater has taken him far and is sure to continue doing so as he dives into new depths and captures breathtaking images.
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