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 some of the key requirements for this type of certification. You will need to do several practical sessions in restricted water before you can get your card.
Normoxic
The IANTD Normoxic Normmix Diving course is designed to train divers who are interested in diving up to 60 metres without using oxygen. The course also includes theory 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. Students are eligible to receive the CCR trimix certification after completing the course.
Technical diver training might be different from the other levels of trimix divers. The bottom mix can be used by a normoxic trimix diver. Hypoxic trimix divers, however, will need to dive in a mix of travel and bottom gas to start their descent. This makes it more difficult as the diver must switch gasses during the first descent. Additionally, hypoxic trimix divers may need to dive longer and with more mixtures.
Hypoxic
Among the many technical diving courses offered by SSI, the Hypoxic Trimix Diver course is considered to be the pinnacle. This course teaches advanced techniques and demonstrates the correct use of travel gas. Students will also learn about the hazards and risks of technical diving as well as how they can respond to emergencies. The course also includes 6 dives that require the use of anoxia-reducing equipment.
The oxygen content in normal air is between 20 and 21 percent. The minimum oxygen content is 18 percent. At sea level, normal air can be breathed because the atmospheric pressure is approximately one bar. Divers who dive in water with less 18 percent oxygen must use a mixture. This will help divers breathe deeper. You should remember that 100 meters of diving requires more oxygen than normal air. To compensate, hypoxic divers will need travel mixes.
Heliox
Numerous myths regarding heliox/diving have been created since the Hans Keller tragedy. Some were concerned at the slow decompression time of Helium. Other were worried about CNS consequences. Helium is expensive and rare, which fuelled these myths. Hydrogen, on the other hand, is abundant, cheap, and has few toxicity concerns. Hydrogen can also be used at any depth.
The Navy Experimental Diving Unit (Navy) was one of the first diving units to investigate the science and practice of decompression. More than 80 years ago, the research team created the first functioning heliox table. They subsequently disproved the mixed gas myth. Actually, the researchers have created a decompression table which could lower the chance of diving-related death. The manufacturer's instructions must be followed by any diver using heliox.
Heliox 32
The Heliox 32 Trimix Diver is an ideal alternative to the Heliair combination. This gas contains less oxygen than 21%. This gas is less toxic than oxygen and is thus cheaper than air. It is highly recommended for diving to any depth. Before switching to this gas, there are several things you need to consider. This gas is described in detail below. You might be surprised at how well it performs for your specific needs.
You should consider what type of diving you are planning to do when choosing a tank. Heliox and Nitrox diver tanks should be lower in helium, since they each release oxygen at different rates. Divers who combine both are dangerous and can get decompression sick. Consider the safety of your diving partner as they may be able to share your weight.