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Recommended reading

  • DIRrebreather: Nitrox Rebreather Diving
    Cedric Verdier
    This book is dedicated to Nitrox rebreather diving and the basic principles and skills that every rebreather diver should know and master. It covers some topics like balance and trim with a rebreather, risk management, and proper Nitrox dive planning.


X-Ray Front Page

Tech

  • Issued by Ambient Pressure Diving, 1st February 2008 to owners of Inspiration and Evolution rebreathers.
    Section: Rebreathers

  • Safety Notice
      |  
    Issued by Ambient Pressure Diving, 1st February 2008 to owners of Inspiration and Evolution rebreathers.

Articles by Cedric Verdier

  • Published in X-Ray Issue:   23 - May 2008
    Cedric Verdier
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    There is no such thing as safe technical rebreather diving without proper preparation. But preparation means much more than just checking equipment, going through dive planning and “What-ifs”. It is also a matter of long-term preparation.
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  • Published in X-Ray Issue:   22 - Mar 2008
    Cedric Verdier
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    Do you plan to explore a deep virgin wreck? Is it your dream to discover a unique cave system deep in the jungle? Have you heard about a Blue Hole miles off shore and want to give it a try? In any case, chances are you’ll be diving in a remote location where emergency medical systems are not much more frequent and up-to-date than traffic lights in the Himalayas.
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  • Published in X-Ray Issue:   21 - Feb 2008
    Cedric Verdier
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    It has been a year now since I started to exclusively side-mount the off-board tanks of my rebreather—either a Megalodon CCR or an Evolution CCR. Why? Simply because it’s much more convenient!
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  • Published in X-Ray Issue:   20 - Dec 2007
    Cedric Verdier
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    How to deal with an unconscious rebreather diver? The title of this article was originally: “What to do if a convulsion happens”. Based on a lot of discussion, private or on various forums, the
    Download pdf: Rebreather Rescue
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  • Published in X-Ray Issue:   19 - Oct 2007
    Cedric Verdier
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    Bailing out to Open Circuit is like falling in the snow when you are learning to ski. It’s a solution when facing a problem—not always the most elegant solution, but always the easiest one, and most of the time, the most efficient one. But Open Circuit bail-out is actually much more than simply going off the loop and breathing from another second stage. There are lots of possibilities.
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  • Published in X-Ray Issue:   18 - Aug 2007
    Cedric Verdier
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    Discussions about diving are very often boring—always the same stories about numerous sharks dangerously close, strong current ripping a mask off or friendly dolphins playing during a deco stop. We
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  • Published in X-Ray Issue:   17 - Jun 2007
    Cedric Verdier
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    There used to be a time when there was no safety margin in any activity that the human being wanted to participate in. In a merciless prehistoric world, on a daily basis, the cave men were hunting with stones and sticks, a large variety of predators the size of a truck, expecting to feed a hungry family. Then, Winchester gave men the ability to kill wild animals while staying at a comfortable distance, without risking their lives. Safety margin was born.
    Download pdf: Safety Margins
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Fancy Gear

Articles by Leigh Cunningham

  • Published in X-Ray Issue:   14 - Dec 2006
    Leigh Cunningham
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    Something I find surprising in the 21st century is the amount of divers that have had no formal training below 40 meters, which chose to conduct dives regularly beyond this depth going to 50 or 60 meters on air and in some cases even deeper.
    Download pdf: Do it right
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  • Published in X-Ray Issue:   12 - Aug 2006
    Leigh Cunningham
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    From the Basic Nitrox levels through to advanced Trimix, we base our calculations of dive profiles on a specific partial pressure of oxygen—pO2. Managing and controlling the pO2 lies at the foundation of any level of technical diving as it enables us to perform longer, deeper and safer dives compared to diving air. But there are also a few points to watch.
    Download pdf: Trimix
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  • Published in X-Ray Issue:   11 - Jun 2006
    Leigh Cunningham
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    A long time ago, I sat in hoosha (Bedouin tent) after a deep air dive in the Blue Hole (Dahab, South Sinai, Red Sea). My good friend and dive buddy had less than an hour ago peeled me of the wall near the bottom of the Blue Hole. I had succumbed to deep water blackout, caused by a high degree of stupidity, wrong kit and inadequate training.
    Download pdf: The Wake Up call
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  • Published in X-Ray Issue:   10 - Apr 2006
    Leigh Cunningham
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    For the last 30 years or so, dive training agencies have been certifying recreational divers as competent to plan and carry out non-decompression and no-stop dives to a max depth of 40msw. This naturally leads to a perceived level of ability, the “advanced scuba diver”. But how “advanced” are they really?
    Download pdf: Double Standards
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  • Published in X-Ray Issue:   09 - Feb 2006
    Leigh Cunningham
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    I checked in at Gatwick Airport on Saturday, the third of December, with three very large dive bags containing all the necessary equipment to make a descent, hopefully, to the deepest wreck ever dived.
    Download pdf: Finding Yolanda
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  • Published in X-Ray Issue:   08 - Dec 2005
    Leigh Cunningham
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    Mask clearing and deployment of the Surface Marker Buoy. What's the connection between these two unrelated skills, you may be excused for thinking. They are both giving many students problems during training, that's what. In both cases it's all about getting it right from the beginning.
    Download pdf: Getting it all right
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