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 how to manage your equipment and the differences between Normoxic, Hypoxic, or Heliox dives. A good understanding of how to maintain your body posture underwater is essential. These are the main requirements for this type certification. For your card to be issued, you must complete several practice sessions in confined waters.
Normoxic
The IANTD Normoxic Normmix diver course is for those who wish to dive up to 60 m without breathing air. It includes a theory component and confined water skill practice. This course does not only cover theory but also covers four stage dives. Students learn skills to deal with emergency situations during these dives. Students can earn the CCR trimix certification upon completion of the course.
Technical diver training may be able to distinguish between the two levels. The bottom mix can be used by a normoxic trimix diver. Hypoxic trimix divers, however, will need to dive in a mix of travel and bottom gas to start their descent. This requires more complex procedures as the diver must change gases during the first 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 teaches advanced techniques and demonstrates the correct use of travel gas. Additionally, students will learn about the risks and hazards of technical diving, as well as how to respond in emergencies. The course includes six dives that will require the use anoxia-reducing gear.
The content of oxygen in normal air ranges from 20 to 21 percent. The minimum oxygen content is 18 percent. Normal air is safe to breathe at sea level because of the low atmospheric pressure (around one bar). Divers must use a blend of travel mixes when diving in waters with less than 18% oxygen. This will enable them to breathe more deeply. Normal air will not be sufficient for a 100 meter dive. For this reason, hypoxic divers must use travel mixes to compensate for this.
Heliox
There have been many myths about diving and heliox since the Hans Keller tragedy. Some were concerned about the slow decompression of helium and others worried about CNS effects. These myths were fuelled by the fact that Helium is scarce and costly. Hydrogen, by contrast, is abundant and cheap. Hydrogen is also safe to use at any depth.
The Navy Experimental Diving Unit is one of the earliest diving organizations to explore the science behind decompression. The first functioning heliox tables were developed by the research team more than 80 years ago. They later disproved mixed gas myths. They have developed a decompression device that can reduce the risk of drowning 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 excellent alternative to standard Heliair. This gas contains less than 21% 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. But, before you decide to switch to this gas, here are some things that you should be aware of. Continue reading to learn more about the gas. It may surprise you at how well it performs according to your needs.
Consider the type of dive you'll be doing when you choose a tank. Heliox and Nitrox diver tanks should be lower in helium, since they each release oxygen at different rates. Combining them can cause decompression illness and could be dangerous. It is important to consider your safety and that of your diving partner.