This means that by the end of this course you will have repeatedly demonstrated your ability to prioritise incidents and deal with them effectively and safely, by motor reflex. Remember that poorly learnt survival skills are the first to be lost.
However, on day one of this course we will expect you to display the minimum skill competencies that you learnt during your Module 2 normoxic trimix diluent CCR training. The reason for this, is that hypoxic trimix diving is a whole new diving environment to you. It is only fair to expect you to be comfortable and competent in the normoxic trimix diluent depth range, before progressing deeper, with ever more increasing decompression obligations
We expect your buoyancy to be spot-on when you commence this course, it is of fundamental importance that you display clear competence in maintaining decompression stop depths.


We believe that your Module 3 training is perhaps the last structured training you will seek on CCR, to this end, we will demonstrate different methods of diving with two, three, four, five, or six additional bailout cylinders. With our extensive range of aluminium, steel and carbon-fibre bailout cylinders you can try different multi-tank configurations throughout the course, in order to find out what system suits you.
We will be conducting both DSMB ascents and ‘blue-water’ ascents with complete decompression profiles, always under the watchful eye of our instructors and technical divemasters. You will complete at least one full open circuit bailout from depth.
Finning technique and reel-use workshops also form part of the course.
At least one of these dives will be a heliox dive, deeper than 75 metres, oh and by the way, if we certify you to 100 metres it is because we have been to at least 97 metres with you (in Switzerland. UK HSE rules dictate 75 metres). The following day after you have successfully completed your course, should you so wish, we offer to conduct a 100 metre + dive with you as dive buddies. Simply because we are prepared to demonstrate our faith in your abilities.
There are a number of lectures during the course that educate and put you in good stead to pass the final written exam. However, the exam is an open book affair and we will ensure that you are adequately prepared to pass it with flying colours.

Lastly, by undertaking training with Zero Gravity Diving, we understand that once your course is complete, you may need further advice or clarification as you build upon the skills you have learnt. Feel free to contact us for any questions or clarifications you may require. Be assured that these will be answered in a non-judgmental way, we are here to help make your diving safer.
Skills conducted on this course:
- Solenoid failure drills (eCCR)
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Manual add failure drills (mCCR)
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Electronics failure
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DSMB deployment
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CCR mask drills
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Open circuit bailout ascents
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Mouthpiece drills
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Hypercapnia identification and resolution
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Cell verification checks
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Multiple stage tank drills
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Semi-Closed Circuit drills
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Diluent switching/use of offboard diluents
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Use of hypoxic trimix diluent
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Use of heliox diluent
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Shallow dangers of using hypoxic mixes
Most importantly, at Zero Gravity Diving, you don’t buy your certification, you EARN it!


Module 3 Advanced Mixed Gas CCR Training
This is where you put all you have learnt into practice!
Minimum Course Prerequisites:
18 years of age
100 logged CCR hours
100 logged CCR dives, of which 50% must be deeper than 30 metres
The objective of this course is to safely dive on closed circuit, using hypoxic trimix/heliox as a diluent gas to 100 metres depth.
We will take you, at your own pace, through the skills and procedures to allow you to dive your CCR, competently and safely, with helium rich mixes. We work with you, using a building-block approach to our training whereby we start by the basic, simple skills then gradually complicate the skill scenarios in order for you to demonstrate competency in the required areas. You will receive clear pre-dive briefings so at all times you will understand what we expect of you and how we will accomplish the skills, working together. Your instructor will demonstrate all of the skills to you first and you will be videoed whilst you perform these skills and debriefings will make use of the footage. We believe this is a great way to problem-solve and for you to see, from a third party viewpoint, how you perform and improve throughout your training.