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Computer + Plan or 2 Computers for Deco Diving

Discussion in 'Technical Diving Specialties' started by Kohanbash, Nov 26, 2019.

  1. rjack321

    rjack321 Captain

    # of Dives: 1,000 - 2,499
    Location: Port Orchard, WA
    9,335
    3,314
    113
    I was trained a long time ago - PS (pre-shearwater lol)
    I consider my buddy's computer/depth gauge to be my backup. I consider his/her brain as a backup to mine.
    I would go with the schedule that makes the most sense. This would likely be recalculating my table plan (assuming it didn't already account for what we've done up until the point of failure) based on a shallower than max depth and seeing how that matches the remaining computer. I would expect my buddy to hang with me even if his/her computer had cleared a stop. The further away our obligations are from one another (for whatever reason) the MORE we need to stick together since things are already going sideways.

    Last summer I ended up doing almost 25 extra minutes of deco with a buddy due to his computer problem - so our 95 min runtime dive got extended up at 120mins. Fortunately I wasn't on OC. If I had been, the time glitch never would have happened as it was a CCR specific issue I think.
     
    NothingClever and helodriver87 like this.
  2. helodriver87

    helodriver87 DIR Practitioner

    # of Dives: 500 - 999
    Location: Alabama
    237
    323
    63
    Yeah, if you're truly diving as a team (same plan, gradient factors, gases, etc) their computer is as good as your computer. Pick the logical schedule based on available information, stick together, share resources, and you're good. I don't really see a compelling reason for a second computer if you're diving that way.
     
    NothingClever likes this.
  3. Bigbella

    Bigbella Barracuda

    # of Dives: I'm a Fish!
    Location: San Francisco
    427
    303
    63
    Agreed. In the old days, it was strictly dive tables and watches, even before the electronic bottom timers; and we were none the worse for them (everyone that I dove with decades ago, can still feel their extremities); but, with the advent of cheaper computers, just carry two -- and keep that old watch; tables; slate, and SPG functioning as well . . .
     
  4. stretchthepenn

    stretchthepenn Barracuda

    # of Dives: 200 - 499
    Location: Atlanta, GA
    208
    132
    43
    Hrm... Good question; you're making me think. Based on past performance, and assuming the entire computer conks out, leaving not even a bottom timer, I think we'd abort the dive and surface together according to the table plan.
     
    Bigbella likes this.
  5. sabbe

    sabbe Angel Fish

    # of Dives: 200 - 499
    Location: Northern VA
    12
    3
    3
    I started #1 until I could afford #2. I'm glad I learned option #1 while training.
    Don't cheap out the 2nd computer, get matching brand computers (same user interface, not necessarily same model) I screwed something up more often than not when I had 1 - Hollis TX1 and 1 - Shearwater Perdix.
    Currently experimenting with different Shearwater display setup on each wrist so I get twice the info at a glance.

    When I added 2nd Shearwater I stopped writing tables, but I've started writing again as I think it helps planning with my current buddy who learned planning a little differently than I.

    If we're warm & comfortable we'll follow tables; if we're cold we'll follow the computer.

    Wrist slate easier/faster to use with thick gloves where I do most my diving.
     
  6. lermontov

    lermontov Manta Ray

    # of Dives: 500 - 999
    Location: christchurch
    816
    371
    63
    looks more tech in photos
     
    Ryan Mcshane, NothingClever and PfcAJ like this.
  7. lermontov

    lermontov Manta Ray

    # of Dives: 500 - 999
    Location: christchurch
    816
    371
    63
    this is how i was instructed - diver last to clear controls the dive ( in regard to deco stops) however that presupposes your diving same profile and G/f - it shouldn't be too much difference 2-3 minutes maybe if theres more then something has gone astray -regardless I stay with my buddy until we both are clear - tropical water no problem cold water im not so happy

    on an aside even with a DC dieing in theory if your monitoring you will have a reasonable idea of times to make an informed decision and if your slate info was adequate youll know if your +/_ the written schedule
     

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