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 some of the key requirements for this type of certification. You will need to take several water-confined sessions to get your card.
Normoxic
The IANTD Normoxic Normmix diver course is for those who wish to dive up to 60 m without breathing air. The course also includes theory and confined-water skill practice. The course also includes theory, four-stage decompression dives and a practice component. Students learn skills to deal with emergency situations 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 normoxic trimix divers can begin their descent in a bottom mixture. To begin their descent, hypoxic trimix divers must use a travel mix. This means more complicated procedures, as the diver must switch gases during the first descent. Hypoxic trimix divers may also need to be able to dive longer due to the greater variety of gases they use.
Hypoxic
The SSI Hypoxic Trimix Diver class is the highest-ranking technical diving course. This course teaches students advanced techniques and uses multiple decompression gas systems, as well as the proper 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 also includes 6 dives that require the use of anoxia-reducing equipment.
When breathing normal air, the content of oxygen is 20 percent to 21 percent. Minimum is 18%. 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 enable them to breathe more deeply. Normal air will not be sufficient for a 100 meter dive. To compensate, hypoxic divers have to use travel mix.
Heliox
Several myths about heliox and diving have arisen since the Hans Keller tragedy. Some were concerned about the slow decompression of helium and others worried about CNS effects. These myths are fueled by the fact helium can be expensive and scarce. Hydrogen on the other hand is plentiful, inexpensive, and poses few toxicity concerns. Furthermore, hydrogen can be used safely at all depths.
The Navy Experimental Diving Unit (Navy) was one of the first diving units to investigate the science and practice of decompression. The first functioning heliox tables were developed by the research team more than 80 years ago. They proved the mixed gas myth wrong. In fact, the research group has developed a decompression table that has the potential to reduce the chances of death while diving. The manufacturer's instructions must be followed by any diver using heliox.
Heliox 32
The Heliox 32 trimix diver is the perfect alternative to the standard Heliair diving mixture. This gas contains less oxygen than 21%. It is therefore less expensive than air and also less toxic. It is recommended for diving in 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.
You must consider the type and purpose of your dives when choosing a tank. Heliox and Nitrox diver tanks should be lower in helium, since they each release oxygen at different rates. Combining both can cause decompression sickness and is dangerous. You should also consider the safety of a diving partner, as they might be able to share your weight with you.