Learn about gas mixtures and the different types of gas available to you when you seek your recreational trimix dive certification. Learn about Normoxic, Hypoxic, and Heliox dives and how to manage your equipment. Additionally, you'll need to know how to keep your body upright underwater. These are the essential requirements for this 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. This course includes both a theory and confined water skills practice. The course also includes theory, four-stage decompression dives and a practice component. These dives are used to teach emergency response skills. Students can earn the CCR trimix certification upon completion of the course.
Technical diver training can be used to differentiate between the two levels. The normoxic trimix can dive in the bottom mix. In contrast, a hypoxic trimix diver must dive in a travel mix to begin their descent. 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 course, among many technical diving courses, is the most prestigious. This course will teach advanced techniques and how to use multiple decompression gases systems. Students will also learn how to deal with emergencies and the dangers of technical diving. Six dives require anoxia-reducing equipment.
The oxygen content in normal air is between 20 and 21 percent. Minimum is 18%. However, at sea level, breathing normal air is safe because atmospheric pressure is around one bar. Divers should use a travel mixture when diving in water that has less than 18% of oxygen. This will help them breathe deeper. It is important to remember that breathing normal air is not enough for a 100 meter dive. To compensate, hypoxic divers will need travel mixes.
Heliox
There have been many myths about diving and heliox since the Hans Keller tragedy. Some were concerned at the slow decompression time of Helium. Other were worried about CNS consequences. Helium is expensive and rare, which fuelled these myths. Hydrogen, however, is cheap and abundant. It also has few toxicological concerns. Hydrogen can also be used at any depth.
One of the first diving groups to study decompression was the Navy Experimental Diving Unit. The first functioning heliox tables were developed by the research team more than 80 years ago. The mixed gas myth was disproven by them. 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 contains less than 21% oxygen. This makes it less toxic than air, and cheaper than other forms of gas. It is recommended for diving at all depths. However, there are a number of things you should consider before switching to this gas. Learn more about this gas. It might surprise you how well it works for your particular needs.
You should consider what type of diving you are planning to do when choosing a tank. Heliox and Nitrox diver tanks should be lower in helium, since they each release oxygen at different rates. Combining the two can result in decompression sickness. It is important to consider your safety and that of your diving partner.