• Welcome to ScubaBoard


  1. Welcome to ScubaBoard, the world's largest scuba diving community. Registration is not required to read the forums, but we encourage you to join. Joining has its benefits and enables you to participate in the discussions.

    Benefits of registering include

    • Ability to post and comment on topics and discussions.
    • A Free photo gallery to share your dive photos with the world.
    • You can make this box go away

    Joining is quick and easy. Login or Register now by clicking on the button

DumpsterDiver emergency ascent from 180'

Discussion in 'Advanced Scuba' started by 2airishuman, Aug 9, 2017.

  1. EricTheDood

    EricTheDood DIR Practitioner

    # of Dives: 100 - 199
    Location: California
    390
    316
    That's a gross oversimplification.

    First stage failures due to factory defects are exceedingly rare. Manufacturers have put forth effort to make things this way in both design and execution of their products. While I understand that failures can still happen, I'm comfortable with the probabilistic odds of failure with regards to new first stages from reputable brands.

    On the other hand, first stage failures due to improper servicing seems to happen with a level of frequency that I'm personally uncomfortable with. If it doesn't bother you, then that's your own prerogative.
     
    Colliam7 likes this.
  2. Colliam7

    Colliam7 Tech Instructor Staff Member ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: Kents Store, VA
    7,361
    4,615
    We not infrequently talk about the serenity of diving, of floating effortlessly underwater, where the only sound (at least, when we are OC) is our bubbles. There is something about being under canopy, that is similarly surreal. Quiet, peaceful, etc.

    In flying there is the 'energy' of take-offs and landings, and the serenity in between (for the most part). If diving, there is the 'energy' of entries and exits, and the serenity in between (for the most part), and in jumping there is the 'energy' of exits and landings, and the serenity in between (for the most part).
     
  3. ams511

    ams511 Solo Diver

    # of Dives: I just don't log dives
    Location: Miami, Florida
    7,200
    2,005
    I always enjoyed DD's posts. I am sorry he was banned. I am glad he is ok.
     
    soggybadger likes this.
  4. snowdog61

    snowdog61 Solo Diver

    # of Dives: 500 - 999
    Location: Florida's East Coast
    869
    558
    Take a peak at spearboard.com - he hasn't got himself banned there and provides 1st hand POV of what happened. Zeagle has requested return of the failed stage so maybe the postmortem will give a better indication of the failure - insufficient torque, re-used diaphragm, HP seat failure etc as it still seems to be elusive.
     
  5. Colliam7

    Colliam7 Tech Instructor Staff Member ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: Kents Store, VA
    7,361
    4,615
    Thanks for alerting us to the thread on that forum. There is a pretty good discussion about what actually failed (diaphragm), and some issues with servicing, as well as his first person account of the event. Worthwhile read there as well as here.
     
  6. stuartv

    stuartv Seeking the Light ScubaBoard Supporter

    # of Dives: 200 - 499
    Location: Lexington, SC
    9,734
    5,544
    A link sure would be convenient...
     
  7. Colliam7

    Colliam7 Tech Instructor Staff Member ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: Kents Store, VA
    7,361
    4,615
    Schwob, stuartv and scubadada like this.
  8. 2airishuman

    2airishuman Solo Diver

    # of Dives: 100 - 199
    Location: Greater Minnesota
    2,613
    1,869
    I read through the thread on the other board. I think it is interesting that DD is in the center of the pack there, or perhaps on the conservative side, in his approach to dive safety and redundancy.

    In response to some questions further back in this thread: 1) DD was diving an HP120 on this dive, and 2) this was not a planned decompression dive.
     
  9. scubadada

    scubadada Diver Staff Member ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: Philadelphia and Boynton Beach
    14,524
    10,980
    Thanks, very interesting read, a very different flavor than here on SB
     
    stuartv likes this.
  10. stuartv

    stuartv Seeking the Light ScubaBoard Supporter

    # of Dives: 200 - 499
    Location: Lexington, SC
    9,734
    5,544
    Thanks, @Colliam7. I will definitely be looking forward to hearing what Zeagle says.

    Pending real analysis from Zeagle.... The posts over there seem to be suggesting that the problem was that the environmental seal diaphragm was, possibly, reused when it should have been replaced. And that that environment seal diaphragm blew out, resulting in the catastrophic gas loss.

    Disclaimer: I'm no reg tech. Not even close. So I might not have even used the correct terms just now.

    So, being reg-ignorant, I would have thought that the environmental diaphragm would just keep dirt, etc. out. Not that it was fundamental to retaining your gas. What's up with that? Does that mean that the little rubber diaphragm I can see on the top of my DR XT regs is the same thing? And if I happened to bump into something sharp that poked a hole in that piece I could also have a catastrophic gas loss?
     

Share This Page