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 Helioxic dives as well how to manage equipment. Also, you will need to be able to maintain your underwater posture. These are the main requirements for this type certification. You will need several sessions in confined water to obtain your card.
Normoxic
The IANTD Normoxic Diver course is for divers who want to learn how to dive to depths of 60 meters and above without using breathing air. The course also includes theory and confined-water skill practice. This course does not only cover theory but also covers four stage dives. Students can practice emergency procedures during these dives. After completing the course, students can apply for the full CCR trimix certificate.
Technical diver training might differentiate between the two levels of trimix divers. The normoxic trimix can dive in the bottom mix. 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 might have to dive for longer periods of time and may need to use a wider range of mixtures.
Hypoxic
The SSI Hypoxic Trimix Diver is one of the best technical diving courses. The course covers advanced techniques, multiple decompression gas systems and proper use of travel gases. Students will also learn the dangers and hazards of technical diving and how to respond to emergency situations. Six of the dives will require you to use anoxia reduction equipment.
The content of oxygen in normal air ranges from 20 to 21 percent. The minimum level is 18%. At sea, breathing normal air is safe as the atmospheric pressure is only one bar. Divers who dive in water with less 18 percent oxygen must use a mixture. This will allow divers to breathe deeper. Normal air will not be sufficient for a 100 meter dive. Hypoxic divers need to use travel mixes in order to compensate.
Heliox
Numerous myths regarding heliox/diving have been created since the Hans Keller tragedy. Some people were concerned about the long decompression times of helium, and others were worried about the potential for CNS effects. Helium is expensive and rare, which fuelled these myths. Hydrogen on the other hand is plentiful, inexpensive, and poses few toxicity concerns. In addition, hydrogen is safe for use at all depths.
The Navy Experimental Diving Unit was one of the first diving organizations to study the science of decompression. The research team developed the first working heliox tables more than eighty years ago. They proved the mixed gas myth wrong. The research group actually developed a decompression system that could reduce your chances of dying while diving. Follow the instructions of your manufacturer if you are a diver using heliox.
Heliox 32
The Heliox 32 trimix diver is the perfect alternative to the standard Heliair diving mixture. This gas contains less than 21% oxygen. This gas is less toxic than oxygen and is thus cheaper than air. It is recommended for diving at all depths. Before switching to this gas, there are several things you need to consider. Read on to learn more about this gas. You might be surprised at how well it performs for your specific needs.
It is important to think about the dive type you will be taking when selecting a tank. Heliox and nitrogen diver tanks need to have lower helium levels, as they each release oxygen at a different rate. Combining the two can result in decompression sickness. A diving partner might be able share your weight, so you should consider their safety.