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  1. Brad_Horn

    Info Lack of OC WOB data for BOVs

    In the 1990’s John Bantin et al in DIVER magazine openly published for the first time the comparative WOB data for a range of common 2nd stages tested at 50m. This caused quite some controversy because no longer was subjective simply good enough a judge of performance. Some regulators that were...
  2. Brad_Horn

    JFD COBRA Safety Notice due flooding incident on bailout drill

    Per https://www.jfdglobal.com/files/5116/0579/4608/DB500-PCN-1_R0.pdf It probably also offers a few considerations for those whom dive recreationally with a bailout rebreather.
  3. Brad_Horn

    Navy Clear on Causes of Physiological Events in Pilots; Final Recommendations Released for PE Mitiga

    Navy Clear on Causes of Physiological Events in Pilots; Final Recommendations Released for PE Mitigation - USNI News Noting hypoxia is recorded as the highest % causation of rebreather fatalities the above link, whilst from a dis-similar origin, might have enough similarities to be of interest...
  4. Brad_Horn

    Rebreather Safety Improvement: Progressively opening Oxygen Cylinder Valve Seat

    In a world first OSEL are quite happy to disclose that they are now supplying their rebreather valves with a progressively opening cylinder valve seat. This is available as a free of cost safety upgrade during annual service for all Apocalypse Type IV CCR owners and can be bought with the...
  5. Brad_Horn

    Hollis publish QinetiQ Feb 2019 testing report for the PRISM II FMCL & BMCL attempt at CE

    OSEL would like to take the time to congratulate Hollis on a cracking first attempt to get their PRISM II prototype FMCL and BMCL units through the EN14143 test requirements, to try and get CE marking. While this is old news from Feb 19, the testing done at QinetiQ was a solid effort, and it...
  6. Brad_Horn

    OSEL Newsletter #22 disclosing iCCR will have solid state O2 sensors

    For those interested in having solid state O2 sensors in your rebreather as a default. OSEL has just disclosed that the iCCR will ship late next year with these included as standard. http://www.opensafety.co.uk/files/OSEL-Rebreather-Newsletter-Number22-20171201.pdf
  7. Brad_Horn

    Brad Horn on the rEvo

    Great, look forward to seeing the accident analysis of each incident published at some point or at the very least, sufficient disclosed to positively rule out the rebreather's design. Richard, something is causing the fatalities on rEvo's! What the root cause is, I do not yet think anyone...
  8. Brad_Horn

    Do You Know What Your Oxygen Cells Do When Water Blocked?

    "Deep Life Ltd have updated their study on "Characterisation of Oxygen Cells for Diving Rebreather Applications: Sourcing, Performance, Safety and Reliability" that has now spanned 16 years. Despite it being a fundamental element of rebreather design and critical to the safe operation of any...
  9. Brad_Horn

    Important information regarding valves on rebreathers

    FYI Important information regarding valves on rebreathers - News - SI-TECH
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