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 how to manage your equipment and the differences between Normoxic, Hypoxic, or Heliox dives. Additionally, you'll need to know how to keep your body upright underwater. These are the most important requirements for this type certificate. You will need several sessions in confined water to obtain your card.
Normoxic
The IANTD Normoxic Normmix diver course is for those who wish to dive up to 60 m without breathing air. It includes a theory component and confined water skill practice. This course includes theory and four stages of decompression diving. Students learn skills to deal with emergency situations during these dives. Upon completion of the course, students are eligible to take the full CCR trimix certification.
Technical diver training can be used to differentiate between the two levels. The normoxic trimix divers can begin their descent in a bottom mixture. Hypoxic trimix divers, however, will need to dive in a mix of travel and bottom gas to start their descent. This requires more complex procedures as the diver must change 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 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 the dangers and hazards of technical diving and how to respond to emergency situations. The course includes six dives that will require the use anoxia-reducing gear.
Normal air contains 20 percent to 21% oxygen. The minimum oxygen content is 18 percent. 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 enable them to breathe more deeply. For a 100 meter dive, normal air is not sufficient. To compensate, hypoxic divers will need travel mixes.
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 fueled by the fact that helium is rare and expensive. Hydrogen, on the other hand, is abundant, cheap, and has few toxicity concerns. 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. More than 80 years ago, the research team created the first functioning heliox table. They proved the mixed gas myth wrong. In fact, they have developed a table for decompression that may reduce the likelihood of your death from diving. Follow the instructions of your manufacturer if you are a diver using heliox.
Heliox 32
The Heliox 32 Trimix Diver is a perfect replacement for the Heliair diving mix. This gas contains less oxygen than 21%. This gas is less toxic than oxygen and is thus cheaper than air. It is recommended to be used for diving at all depths. 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 might surprise you how well it works for your particular 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. Divers who combine both are dangerous and can get decompression sick. A diving partner might be able share your weight, so you should consider their safety.