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. A good understanding of how to maintain your body posture underwater is essential. 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 designed for divers who wish to be able to dive to 60m without the use of breathing air. It has both a theory portion and confined water practice. This course offers four stage decompression dives in addition to the theory. 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 can be used to differentiate between the two levels. The normoxic trimix diver can start on the bottom mix. In contrast, a hypoxic trimix diver must dive in a travel mix to begin their descent. This makes it more difficult as the diver must switch gasses during the first descent. Hypoxic trimix divers may be required to dive longer as they can mix more gases.
Hypoxic
The SSI Hypoxic Trimix Diver Course is the most prestigious of all the technical diving courses. The course covers advanced techniques, multiple decompression gas systems and proper use of travel gases. 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%. 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 help them breathe deeper. 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
Since the Hans Keller tragedy, many myths have been created about heliox diving. 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.
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. They subsequently disproved the mixed gas myth. The research group actually developed a decompression system that could reduce your chances of dying while diving. Diving with heliox should follow all instructions.
Heliox 32
The Heliox 32 Trimix Diver is a perfect replacement for the Heliair diving mix. 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 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. You may be amazed at the results it can provide for your particular needs.
When choosing a tank, you have to consider the type of dive that you will be taking. Heliox tanks and nitrogen divers tanks should have lower levels of helium because they release oxygen at differing rates. Combining them can cause decompression illness and could be dangerous. You should also consider the safety of a diving partner, as they might be able to share your weight with you.