Learn about gas mixtures and the different types of gas available to you when you seek your recreational trimix dive certification. 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 some of the key requirements for this type of certification. You will need to take several water-confined sessions to 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. This course includes both a theory and confined water skills practice. In addition to theory, this course also includes four stage decompression dives. During these dives, students practice skills for emergency scenarios. Upon completion of the course, students are eligible to take the full CCR trimix certification.
Technical diver training could 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. The diver will need to switch gas mixtures during their first descent, which can make it more difficult. Hypoxic trimix divers may be required to dive longer as they can mix more gases.
Hypoxic
Among the many technical diving courses offered by SSI, the Hypoxic Trimix Diver course is considered to be the pinnacle. 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 contains 20 percent to 21% oxygen. The minimum oxygen content is 18 percent. Normal air is safe to breathe at sea level because of the low atmospheric pressure (around one bar). When diving in water with less than 18 percent of oxygen, divers must use a travel mix. This will help divers breathe deeper. It is important to remember that breathing normal air is not enough for a 100 meter dive. To compensate, hypoxic divers have to use travel mix.
Heliox
There have been many myths about diving and heliox 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. These myths were fueled by the fact that helium is rare and expensive. Hydrogen on the other hand is plentiful, inexpensive, and poses few toxicity concerns. Additionally, hydrogen can be used 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 disproved the mixed-gas myth. In fact, they have developed a table for decompression that may reduce the likelihood of your death from diving. A diver who uses heliox must follow the manufacturer's instructions carefully.
Heliox 32
The Heliox 32 Trimix Diver is an ideal alternative to the Heliair combination. 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 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. You can read on to find out more about this gas. You might be surprised by how well this gas performs for you.
You must consider the type and purpose of your dives 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 both can cause decompression sickness and is dangerous. A diving partner might be able share your weight, so you should consider their safety.