Every diver is familiar with nitrogen narcosis. Under pressure, inert gasses like nitrogen interfere with the nervous system. This causes a number of problems for divers. Narcosis is often described as a euphoric feeling. However, it can also manifest as paranoia, anxiety, nervousness, and difficulty concentrating. But we can minimize narcosis by limiting the amount of nitrogen in our breathing gas. In order to do this, we add helium to our gas to reduce the nitrogen content. Such gas mixes are called "trimix." Helitrox is one type of trimix. Helitrox Diver certification allows you to use a maximum of 20% helium in your breathing gas. You can plan and conduct dives to a maximum depth of 150'.
The course can be taught as a stand alone for those divers already certified as Adv. Nitrox Divers, or it may be combined with Adv. Nitrox/Deco Procedures. By combining the three courses, you will be able to:
- plan and execute dives to a maximum depth of 150' that require staged decompression,
- utilize a modest amount of helium in your breathing gas to manage nitrogen narcosis, and
- optimize your ascent schedule by using oxygen-rich gasses to aid decompression.
The combination course can be taught entirely at the quarry. Better yet, we can begin at the quarry and complete the course dives on a Great Lakes charter. What better way to complete your transition to technical diving than by visiting an amazing shipwreck!
At a Glance
Combination Adv. Nitrox, Deco and Helitrox