It is essential to be knowledgeable about the types of gas used and the mix ratios that are required for recreational trimix divers certification. Learn how to manage your equipment and the differences between Normoxic, Hypoxic, or Heliox dives. It is also important to understand how to maintain your body position underwater. These are the main requirements for this type certification. You will need several sessions in confined water to obtain 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 also has a theory component as well as confined water skill practice. This course does not only cover theory but also covers four stage dives. These dives allow students to practice emergency 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 normoxic trimix divers can begin their descent in a bottom mixture. To begin their descent, hypoxic trimix divers must use a travel mix. This requires more complex procedures as the diver must change gases during the first descent. In addition, hypoxic trimix divers may have to dive longer, in addition to diving with a larger variety of mixtures.
Hypoxic
Among the many technical diving courses offered by SSI, the Hypoxic Trimix Diver course is considered to be the pinnacle. This course will teach advanced techniques and how to use multiple decompression gases systems. Students will also learn about technical diving's hazards and how to react in an emergency. The course includes six dives that will require the use anoxia-reducing gear.
When breathing normal air, the content of oxygen is 20 percent to 21 percent. The minimum is 18 percent. However, at sea level, breathing normal air is safe because atmospheric pressure is around one bar. Divers must use a mix of travel and oxygen when diving in water less than 18% oxygen. This will help them breathe deeper. It is important to remember that breathing normal air is not enough for a 100 meter dive. Hypoxic divers need to use travel mixes in order to compensate.
Heliox
Numerous myths regarding heliox/diving have been created 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, by contrast, is abundant and cheap. Hydrogen can also be used at any depth.
The Navy Experimental Diving Unit is one of the earliest diving organizations to explore the science behind decompression. More than 80 years ago, the research team created the first functioning heliox table. The mixed gas myth was disproven by them. 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 consists of less than 21% oxygen. Because it contains less oxygen than air, it is cheaper and more toxic than the latter. It is recommended to be used for diving at all depths. There are many things you need to remember before switching to this type of gas. You can read on to find out more about this gas. It may surprise you at how well it performs according to your needs.
It is important to think about the dive type you will be taking when selecting a tank. Heliox tanks and nitrogen divers tanks should have lower levels of helium because they release oxygen at differing rates. Combining them can cause decompression illness and could be dangerous. Consider the safety of your diving partner as they may be able to share your weight.