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 the basics of Normoxic, Hypoxic and Heliox diving and how to handle your equipment. It is also important to understand how to maintain your body position underwater. These are just a few of the requirements to obtain this certification. To get your card, you will need to complete several practical sessions in confined water.
Normoxic
The IANTD Normoxic Normmix diver course is for those who wish to dive up to 60 m without breathing air. It has both a theory portion and confined water practice. This course does not only cover theory but also covers four stage dives. Students can practice emergency procedures during these dives. After completing the course, students can apply for the full CCR trimix certificate.
Technical diver training might differentiate between the two levels of trimix divers. The normoxic trimix can dive in the bottom mix. A hypoxic trimix diver, on the other hand, must begin their descent in a travel mixture. This can lead to more complicated procedures because the diver must switch between gases during each 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 is advanced in techniques and uses multiple decompression systems. It also teaches proper use for travel gas. Students will also learn about technical diving's hazards and how to react in an emergency. Six of the dives will require you to use anoxia reduction equipment.
Normal air has a 20 percent to 21% oxygen content. The minimum 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 allow divers to 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
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 are fueled by the fact helium can be expensive and scarce. Hydrogen, by contrast, is abundant and cheap. Additionally, hydrogen can be used at all depths.
The Navy Experimental Diving Unit was the first organization to research the science of diving. The first functioning heliox tables were developed by the research team more than 80 years ago. They subsequently 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 excellent alternative to standard Heliair. This gas contains less oxygen than 21%. This makes it less toxic than air, and cheaper than other forms of gas. It is highly recommended for diving to any depth. There are some things to keep in mind before you switch to this gas. This gas is described in detail below. It might surprise you how well it works for your particular needs.
It is important to think about the dive type you will be taking when selecting a tank. Heliox and nitrogen diver tanks need to have lower helium levels, as they each release oxygen at a different rate. Divers who combine both are dangerous and can get decompression sick. You should also consider the safety of a diving partner, as they might be able to share your weight with you.