You should be familiar with the various types of gas and their mix ratios if you want to obtain your recreational trimix diver certificate. Learn about Normoxic, Hypoxic, and Heliox dives and how to manage your equipment. Also, you will need to be able to maintain your underwater posture. These are just a few of the requirements to obtain this certification. You will need to do several practical sessions in restricted water before you can get your card.
Normoxic
The IANTD Normoxic Trimix Diver course is a training course for divers who would like to dive up to 60 meters without breathing air. It includes a theory component and confined water skill practice. This course does not only cover theory but also covers four stage dives. 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. Additionally, hypoxic trimix divers may need to dive longer and with more mixtures.
Hypoxic
The SSI Hypoxic Trimix Diver Course is the most prestigious of all the technical diving courses. This course teaches advanced techniques and demonstrates the correct 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. The minimum is 18 percent. At sea level, normal air can be breathed because the atmospheric pressure is approximately one bar. Divers must use a mix of travel and oxygen when diving in water less than 18% oxygen. This will help divers breathe deeper. It is important to remember that breathing normal air is not enough for a 100 meter dive. Hypoxic divers should use travel mixtures to compensate.
Heliox
Several myths about heliox and diving have arisen since the Hans Keller tragedy. Some were concerned at the slow decompression time of Helium. Other were worried about CNS consequences. These myths were fuelled by the fact that Helium is scarce and costly. Hydrogen, on other hand, can be found in abundance, is inexpensive, and has very few toxicity concerns. In addition, hydrogen is safe for use at all depths.
One of the first diving groups to study decompression was the Navy Experimental Diving Unit. The research team developed the first working heliox tables more than eighty years ago. The mixed gas myth was disproven by them. In fact, they have developed a table for decompression that may reduce the likelihood of your death from diving. Use of heliox by divers must be in compliance with the manufacturer's instructions.
Heliox 32
The Heliox 32 Trimix Diver is an excellent alternative to standard Heliair. 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 in all depths. But, before you decide to switch to this gas, here are some things that you should be aware of. You can read on to find out 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 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. Safety of a diving partner is also important, since they may be able and willing to share your weight.