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Thread: "working underwater with RB" !?

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    New Member tommiblom is an unknown quantity at this point tommiblom's Avatar
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    "working underwater with RB" !?

    Hello forum,

    Is there any one of you who have any kind of experience "working" underwater with rebreather, any tips.
    We have a small problem that need to moved away with saw and crowbar to get little further IN.

    All knowledge appreciated.

    Cheers

    TB

  2. #2
    So many CCR So little etc Mark Chase has a reputation beyond repute Mark Chase has a reputation beyond repute Mark Chase has a reputation beyond repute Mark Chase has a reputation beyond repute Mark Chase has a reputation beyond repute Mark Chase has a reputation beyond repute Mark Chase has a reputation beyond repute Mark Chase has a reputation beyond repute Mark Chase has a reputation beyond repute Mark Chase has a reputation beyond repute Mark Chase has a reputation beyond repute Mark Chase's Avatar
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    Re: "working underwater with RB" !?

    Its hardly earth shatteing news but the WOB on the unit becomes very noticable when you start chuffing away. On one or two ocasions I have gone OC to give my tired lungs a rest from sucking gas and pumping it back into the CLs

    Id plan on extra OC bailout to cover OC breaks if the workload was significant and to alow comparison with CCR breathing for possable retained C02 build up.

    If deep set PP02 low (1.0- 1.1) to avoid work related tox risk

    HUDS make safety vastly improved if not there should be a buddy on common sense patrol who can see your gauges/pp02.

    Take some isotonic fluids in with you if you have significant deco after because it can be thirsty work.

    Take a lift bag for the tools so you dont have to strugle with overweight boyancy during deco.

    If you need heavy tools (like a 6ft crowbar :D) drop them down the shot for colection on the bottom so you dont have to struggle with them getting in.

    HTH and isnt insulting.

    ATB

    Mark
    Last edited by Mark Chase; 26th June 2008 at 22:40.

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    New Member tommiblom is an unknown quantity at this point tommiblom's Avatar
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    Re: "working underwater with RB" !?

    Hi Mark,

    Thanks for your reply. After some thinking I actually thought to bring one extra 80cf O/C bail out just for the work, dont know when havent try but dont sound too exiting to work with RB..

    Tools can be left there for the 2nd task or if needed top bring up the deco part is in nice slope kind of bottom so we can just drop them at the depth and then pick up later again. Most likely tools will stay there in the dark deep inside the system.

    Cheers TB

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    PROTEC MEXICO mattmexico is a name known to all mattmexico is a name known to all mattmexico is a name known to all mattmexico is a name known to all mattmexico is a name known to all mattmexico is a name known to all mattmexico is a name known to all mattmexico is a name known to all mattmexico is a name known to all mattmexico is a name known to all mattmexico is a name known to all mattmexico's Avatar
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    Re: "working underwater with RB" !?

    yo

    During the shoot of " The Cave " movie I was working for two month about 8 hours a day underwater using a Megalodon. In Romania in a 6 meter deep pool and in Mexico in 12meters of water in the caves.

    The work had a wide range of workloads from just sitting and holding stuff in my hands to hauling long cables and large sleds underwater.

    The only problem we had was the use of Extend Air cardtridges in the Meg which broke through in shallow ater under very hard work loads but that changed when we starting using regular axial scrubber cannisters.

    Keep an eye on OTU as well as CNS if you do long hauls ...

    greetings
    Matt
    N 20' 37.617'
    W 87' 04.693'

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    Re: "working underwater with RB" !?

    Make liberal use of "zip" gun and other air powered tools, such as saws and the like.

    The el-cheapo models consume very little gas, they don't work as hard as the premium tools, however one would be surprised at the results.

    Use a lot of oil on them, even in salt conditions they can do amazing stuff. They can often be recovered even after seizing up.

    Once you use one of these, you will likely hardly go back to the hammer.

    The are so cheap, even disposing is low-cost.

    Regarding the RB, periodic breaks work nicely to allow the scrubber to catch up when overloaded, pacing is of the essence. A good machine goes without saying.

    If you can drop the bailout, yet keep it close enough, that can also provide added mobility, or use a 20 or 40 attached to you and something bigger nearby, all depending on depth. Keep yourself light, try to trim out however your machine works best. Hydrate adequately before. A fresh scrubber is always good.

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    RBW Member johnv is just really nice johnv is just really nice johnv is just really nice johnv is just really nice johnv is just really nice johnv is just really nice johnv is just really nice johnv is just really nice johnv is just really nice johnv's Avatar
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    Re: "working underwater with RB" !?

    Just do what you need there is no reason not to use a CCR for clearing boulders etc.

    just don't get carried away and forget the ppo2, keep tools away from hozes and have fun.


    good luck with your project.
    John

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