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Why extra air when solo?

Discussion in 'Solo Divers' started by pauldw, Jul 11, 2019.

  1. TheGraveyardDiver

    TheGraveyardDiver Angel Fish

    # of Dives: 200 - 499
    Location: Morehead City, NC USA
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    I carry a 13 cu ft strapped to my main.

    1) it weights just a few pounds out of the water, so "hurting my back" isn't an issue.
    2) In the water it weighs next to nothing. The Aluminum 13 didn't affect my buoyancy one bit. I used 14 lbs before and I use 14 lbs with it strapped onto my main.

    "In all my years I've never seen..." isn't a valid defense to not having redundant air. I have a spare tire on my truck but I've never had to use it. I also have a fire extinguisher on my boat that I've never needed. I have a concealed handgun permit and a pistol but I've never had to shoot anybody. Also have O2 on the boat but never needed to use it. Never needed the air bags on my truck either.

    Prior experience isn't an indicator of future need.

    I've never needed to switch to my pony in a real situation, but my practice shows me I can surface from 100 feet at a safe rate, do a short safety stop, and return to the boat with about 300 PSI left if I needed to. If I never need it, that's fine with me. It's cheap insurance.
     
  2. Diver-Drex

    Diver-Drex Barracuda

    # of Dives: 500 - 999
    Location: US east coast
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    SM here. Prior to that I used a pony. Redundant gas is the standard on NJ dive boats, solo or not.

    I’m agnostic as to an octo or not on the backgas if you have a pony. But I don’t agree with swapping it back and forth. You introduce a greater chance of o-ring failure than just leaving the octo attached.
     
    AfterDark likes this.
  3. Satrekker

    Satrekker Nassau Grouper

    # of Dives: 200 - 499
    Location: Clearwater, FL
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    I don't disagree. I'm just too lazy to take my necklace off the 1st stage and put in a plug. :-O
     
    AfterDark likes this.
  4. Eric Sedletzky

    Eric Sedletzky Great White

    # of Dives: 500 - 999
    Location: Santa Rosa, CA
    3,691
    3,318
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    +1
     
  5. Satrekker

    Satrekker Nassau Grouper

    # of Dives: 200 - 499
    Location: Clearwater, FL
    195
    87
    28
    Don't laugh. When I was first certified in 1984, I was taught to use my Seaquest bcd bladder as an emergency air source.
     
  6. pauldw

    pauldw Solo Diver

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    Yeah, the Royal Life Saving Society Canada produced a book by Albert Pierce in 1985 that was interesting for the number of things it had in it that you'd never see in a PADI manual. Apparently they don't water things down in the Great White North. Five pages of different techniques related to breathing off a BC. Perhaps they tested it on the McKenzie Brothers first, whose blood alcohol probably purged the bladders of any pathogens.
     
  7. John C. Ratliff

    John C. Ratliff Instructor, Scuba

    # of Dives: I'm a Fish!
    Location: Beaverton, Oregon
    2,695
    1,162
    113
    Ken,

    If you are diving in that cold water, and a freeflow is "Likely" with your regulator, you may wish to look at different regulators which have a much lower likelihood of a free flow problem. There are regulators evaluated for use in the Antarctic Ocean, and a new double hose regulator, the Argonaunt Kracken, which are much less likely to free flow due to their design keeping water away from the second stage.

    SeaRat
     
  8. happy-diver

    happy-diver Skindiver Just feelin it ScubaBoard Sponsor

    # of Dives: 100 - 199
    Location: same ocean as you
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  9. KenGordon

    KenGordon Rebreather Pilot

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    “A freeflow is just one example, other failures are possible and you don’t want it to be a death sentence.”

    Freeflows will happen, usually first stage freeflows, no matter what OC kit is used, expanding gas gets cold and freezes stuff. People do actually die this way, a member of another local club died about three years ago due to a freeflow. It is not if but when.

    Really a lot of what we teach people is about redundancy. Initially that comes from a buddy, eventually from kit and a buddy, and then for solo just from kit. I don’t expect kit to fail, it almost never happens, but freeflows are common.

    Personally I use Apeks regulators. I think they are excellent and very suitable for deep cold water, however I wouldn’t bet my life on taking just one on a dive.
     
  10. Storker

    Storker Divemaster

    # of Dives: 100 - 199
    Location: close to a Hell which occasionally freezes over
    12,552
    8,956
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    Absolutely, but:

    I've seen a fair amount of 2nd stage freeflows. I've had a few myself. Nearly all of my clubmates who dive during winter has had one or more. All of them on the surface, nearly all of them after the dive.

    I've yet to experience, see, or hear one of my clubmates tell me about, a 1st stage freeflow.

    What are we doing wrong up here since our experience is directly opposite to what you're saying?

    PS: We agree 100%, though, that it's a very good idea to have a fully redundant gas source if you're diving solo or can't make a direct ascent at any time during the dive
     
    AfterDark likes this.

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