Learn about gas mixtures and the different types of gas available to you when you seek your recreational trimix dive certification. You will learn about Normoxic and Hypoxic dives, as well as how to manage your equipment. A good understanding of how to maintain your body posture underwater is essential. These are the most important requirements for this type certificate. To get your card, you will need to complete several practical sessions in confined water.
Normoxic
The IANTD Normoxic Normmix Diving course is designed to train divers who are interested in diving up to 60 metres without using oxygen. It includes a theory component and confined water skill practice. This course offers four stage decompression dives in addition to the theory. Students can practice emergency procedures during these dives. Students are eligible to receive the CCR trimix certification after completing the course.
Technical diver training might be different from the other levels of trimix divers. The normoxic trimix diver can start on the bottom mix. For a hypoxic trimix diver to start their descent, they must dive in a mixture of bottom and travel gases. This means more complicated procedures, as the diver must switch gases 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 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. Students will also learn how to deal with emergencies and the dangers of technical diving. Six dives are required to be equipped with anoxia-reducing equipment.
Normal air has a 20 percent to 21% oxygen content. Minimum is 18%. Normal air is safe for breathing at sea level as the atmospheric pressure hovers around one bar. When diving in water with less than 18 percent of oxygen, divers must use a travel mix. This will allow them to breathe deeper. For a 100 meter dive, normal air is not sufficient. Hypoxic divers should use travel mixtures to compensate.
Heliox
Many myths surrounding heliox, diving and the Hans Keller tragedy have emerged since then. Some were concerned by the long decompression time of helium. Others were more concerned about CNS effects. These myths were fuelled by the fact that Helium is scarce and costly. Hydrogen, by contrast, is abundant and cheap. Furthermore, hydrogen can be used safely 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 disproved the mixed-gas myth. In fact, they have developed a table for decompression that may reduce the likelihood of your death from diving. The manufacturer's instructions must be followed by any diver using heliox.
Heliox 32
The Heliox 32 Trimix Diver is an ideal alternative to the Heliair combination. This gas consists of less than 21% oxygen. As a result, it is not only cheaper than air but is also less toxic. It is also recommended for diving at any depth. But, before you decide to switch to this gas, here are some things that you should be aware of. Learn more about this 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 tanks and nitrogen divers tanks should have lower levels of helium because they release oxygen at differing rates. A dive that combines both is dangerous, and it can lead to decompression sickness. Consider the safety of your diving partner as they may be able to share your weight.