You should be familiar with the various types of gas and their mix ratios if you want to obtain your recreational trimix diver certificate. 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 essential requirements for this 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. It has both a theory portion and confined water practice. In addition to theory, this course also includes four stage decompression dives. Students learn skills to deal with emergency situations during these dives. Upon completion of the course, students are eligible to take the full CCR trimix certification.
Technical diver training might differentiate between the two levels of trimix divers. The normoxic trimix can dive in the bottom mix. To begin their descent, hypoxic trimix divers must use a travel mix. This can lead to more complicated procedures because the diver must switch between gases during each descent. Hypoxic trimix divers may also need to be able to dive longer due to the greater variety of gases they use.
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 how to deal with emergencies and the dangers of technical diving. The course includes six dives that will require the use anoxia-reducing gear.
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. Normal air will not be sufficient for a 100 meter dive. Hypoxic divers need to use travel mixes in order to compensate.
Heliox
Since the Hans Keller tragedy, many myths have been created about heliox diving. Some people were concerned about the long decompression times of helium, and others were worried about the potential for CNS effects. Helium is expensive and rare, which fuelled these myths. Hydrogen, by contrast, is abundant and cheap. Furthermore, hydrogen can be used safely at all depths.
One of the first diving groups to study decompression was the Navy Experimental Diving Unit. They developed the first working heliox tablets more than eighty-years ago. They later disproved mixed gas myths. Actually, the researchers have created a decompression table which could lower the chance of diving-related death. Follow the instructions of your manufacturer if you are a diver using heliox.
Heliox 32
The Heliox 32 Trimix Diver is an ideal alternative to the Heliair combination. This gas is less than 21% in oxygen. As a result, it is not only cheaper than air but is also less toxic. It is recommended for diving at all depths. But, before you decide to switch to this gas, here are some things that you should be aware of. Learn more about this gas. You may be amazed at the results it can provide for your particular needs.
You must consider the type and purpose of your dives when choosing a tank. Heliox tanks and nitrogen divers tanks should have lower levels of helium because they release oxygen at differing rates. A dive that combines both is dangerous, and it can lead to decompression sickness. It is important to consider your safety and that of your diving partner.