If you're looking for your recreational trimix diving certification, it is important to understand the differences between gas types and how they mix. Learn about Normoxic, Hypoxic, and Heliox dives and how to manage your equipment. A good understanding of how to maintain your body posture underwater is essential. These are the most important requirements for this type certificate. To get your card, you will need to complete several practical sessions in confined water.
Normoxic
The IANTD Normoxic Normmix diver course is for those who wish to dive up to 60 m without breathing air. It has both a theory portion and confined water practice. The course also includes theory, four-stage decompression dives and a practice component. Students can practice emergency procedures during these dives. Upon completion of the course, students are eligible to take the full CCR trimix certification.
Technical diver training could differentiate between the two levels. The bottom mix can be used by a normoxic trimix diver. In contrast, a hypoxic trimix diver must dive in a travel mix to begin their descent. This can lead to more complicated procedures because the diver must switch between gases during each descent. Additionally, hypoxic trimix divers may need to dive longer and with more mixtures.
Hypoxic
The SSI Hypoxic Trimix Diver Course is the most prestigious of all the technical diving courses. This course is advanced in techniques and uses multiple decompression systems. It also teaches proper use for travel gas. Students will also learn about technical diving's hazards and how to react in an emergency. Six dives are required to be equipped with anoxia-reducing equipment.
When breathing normal air, the content of oxygen is 20 percent to 21 percent. The minimum oxygen content is 18 percent. At sea, breathing normal air is safe as the atmospheric pressure is only one bar. Divers must use a blend of travel mixes when diving in waters with less than 18% oxygen. This will help them breathe deeper. For a 100 meter dive, normal air is not sufficient. Hypoxic divers should use travel mixtures to compensate.
Heliox
Many myths surrounding heliox, diving and the Hans Keller tragedy have emerged since then. Some people were concerned about the long decompression times of helium, and others were worried about the potential for CNS effects. These myths were fuelled by the fact that Helium is scarce and costly. Hydrogen, on the other hand, is abundant, cheap, and has few toxicity concerns. Furthermore, hydrogen can be used safely at all depths.
The Navy Experimental Diving Unit is one of the earliest diving organizations to explore the science behind decompression. The research team developed the first working heliox tables more than eighty years ago. They disproved the mixed-gas myth. The research group actually developed a decompression system that could reduce your chances of dying while diving. Use of heliox by divers must be in compliance with the manufacturer's instructions.
Heliox 32
The Heliox 32 Trimix Diver is an ideal alternative to the Heliair combination. This gas has less than 21% of oxygen. Because it contains less oxygen than air, it is cheaper and more toxic than the latter. It is recommended to be used for diving at all depths. Before switching to this gas, there are several things you need to consider. Learn more about this gas. It may surprise you at how well it performs according to your needs.
It is important to think about the dive type you will be taking when selecting a tank. Heliox and nitrogen diver tanks should have a lower helium content, as they both release oxygen at different rates. A dive that combines both is dangerous, and it can lead to decompression sickness. A diving partner might be able share your weight, so you should consider their safety.