- Technical Series - Phase II
Phase II is a shorter program than its predecessor. It reviews the main points from Phase I then moves into an in-depth study of helium based diving.
Heli-Air:
Heli-Air is a helium-based breathing mixture where the oxygen content is always less than 21%. It is a safe blend to mix since helium is simply adding into air. You never handle pure oxygen yet still achieve what is considered a full tri-mix blend. By its nature, the limiting factor is the oxygen percentage; it must stay above 16%. This gives Heli-Air a max depth limited of 180 feet.
Tri Mix I:
Tri-Mix I divers are trained to dive up to but not to exceed 200 feet. Tri-Mix I mixes oxygen, helium and air to achieve an END depth of 80 to 130 feet, depending on the divers preference. Beyond that point, gas volumes and the use of hypoxic mixes becomes more of an issue.
Tri Mix II:
Tri Mix II allows divers to utilize any gas (hypoxic or not) to a depth of 250 feet. This is the maximum depth that NAUI recognizes for its training. In reality, any dives made beyond that depth requires the same knowledge base. Tri-Mix II obviously requires more gas usages, planning, etc.
You’ll Learn...
How to analyze your own breathing gas mixtures
How to plan and safely execute each dive
How to calculate gas consumption, oxygen exposure and inert gas loading for each stage of the dive and for each breathing gas mixture
Review and demonstrate switching and isolating a malfunctioning regulator
Participate in a diver rescue simulation to include management of a diver experiencing oxygen toxicity underwater
Demonstrate proficiency of at least two of the required dives ascend with ascent reel and line bag and perform stage decompression
Prerequisites:
Requirements:
Prerequisites:
| Class | Min. Age |
Required Dives (Prior to taking this class) | Certification Requirements |
| Heli-Air | 18 | 75 dives w/ 10 being decompression dives | All of the above |
| Tri-Mix I | 18 | 100dives w/ 20 being decompression dives | All of the above |
| Tri-Mix II | 18 | 100dives w/ 20 being decompression dives | All of the above |
Requirements:
| Course | Required Class- Related Dives | Estimated Course Hours | Depth Limits |
| Heli – Air | 6 | 8 | All dives 100 - 180 |
| Tri-Mix I | 6 | 18 | 2 dives <180 but >200 |
| Tri-Mix II | 2 | -- | 2 dives between 200 - 250 |
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Dates:
Because very few divers ever achieve this level of expertise, Phase II is scheduled as requested. Please call to put your name on a list of potential Phase II students. Phone 269-968-8551.
Cost:
Call for current rates. Prices fluctuate depending on the training dive locations.
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