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 the basics of Normoxic, Hypoxic and Heliox diving and how to handle your equipment. 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 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. These dives are used to teach emergency response skills. Upon completion of the course, students are eligible to take the full CCR trimix certification.
Technical diver training might be different from the other levels of trimix divers. The bottom mix can be used by a normoxic trimix diver. For a hypoxic trimix diver to start their descent, they must dive in a mixture of bottom and travel gases. This makes it more difficult as the diver must switch gasses during the first descent. Hypoxic trimix divers may also need to be able to dive longer due to the greater variety of gases they use.
Hypoxic
The SSI Hypoxic Trimix Diver course, among many technical diving courses, is the most prestigious. The course covers advanced techniques, multiple decompression gas systems and proper use of travel gases. Students will also learn how to deal with emergencies and the dangers of technical diving. Six dives require anoxia-reducing equipment.
The oxygen content in normal air is between 20 and 21 percent. The minimum oxygen content is 18 percent. Normal air is safe for breathing at sea level as the atmospheric pressure hovers around one bar. Divers should use a travel mixture when diving in water that has less than 18% of oxygen. This will allow them to breathe deeper. Remember that normal air does not suffice for a 100-meter dive. To compensate, hypoxic divers will need travel mixes.
Heliox
Several myths about heliox and diving have arisen since the Hans Keller tragedy. 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, on the other hand, is abundant, cheap, and has few toxicity concerns. Additionally, hydrogen can be used at all depths.
The Navy Experimental Diving Unit was the first organization to research the science of diving. The research team developed the first working heliox tables more than eighty years ago. They disproved the mixed-gas myth. Actually, the researchers have created a decompression table which could lower the chance of diving-related death. Use of heliox by divers must be in compliance with the manufacturer's instructions.
Heliox 32
The Heliox 32 Trimix Diver is an ideal alternative to the Heliair combination. This gas contains less than 21% oxygen. As a result, it is not only cheaper than air but is also less toxic. It is recommended for diving at all depths. Before switching to this gas, there are several things you need to consider. Continue reading to learn more about the gas. You may be amazed at the results it can provide 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.