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Thread: Bailout size?

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    RBW Member Submis is a glorious beacon of light Submis is a glorious beacon of light Submis is a glorious beacon of light Submis is a glorious beacon of light Submis is a glorious beacon of light Submis is a glorious beacon of light Submis is a glorious beacon of light Submis is a glorious beacon of light Submis is a glorious beacon of light Submis is a glorious beacon of light Submis is a glorious beacon of light Submis's Avatar
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    Bailout size?

    Hello RBW-members

    Being a new CCR diver, I consider which bailout size would make me feel on the safe side on various dives.

    I just set up a spreadsheet with a few assumptions.

    I start out with 200 atm and reserve 50 for suit inflation and 50 for reserve.
    I set the breathing rate for 25 l/min * pressure from half maximum depth.
    Assent rate 7 m/minute + 3 min stop at 4,5 m for dives deeper than 9 meters.
    Dives are no-deco dives.

    The result was the following bailout sizes and maximum dive depths:

    2 liter max 12 meter
    3 liter max 20 meter
    4 liter max 26 meter
    5 liter max 32 meter
    6 liter max 37 meter
    7 liter max 42 meter

    I know that this is a very individual choice. I know that 25 l/min is low, but find 100 atm for suit and reserve to be conservative. I know that this will not be sufficient for two divers.

    What are your thoughts on this issue?

    regards

  2. #2
    Hammerhead CCR diverklondike has a reputation beyond repute diverklondike has a reputation beyond repute diverklondike has a reputation beyond repute diverklondike has a reputation beyond repute diverklondike has a reputation beyond repute diverklondike has a reputation beyond repute diverklondike has a reputation beyond repute diverklondike has a reputation beyond repute diverklondike has a reputation beyond repute diverklondike has a reputation beyond repute diverklondike has a reputation beyond repute diverklondike's Avatar
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    Re: Bailout size?

    What did your instructor teach you on this topic?

  3. #3
    Supporting Member kevin stone is just really nice kevin stone is just really nice kevin stone is just really nice kevin stone is just really nice kevin stone is just really nice kevin stone is just really nice kevin stone is just really nice kevin stone is just really nice kevin stone is just really nice kevin stone is just really nice kevin stone's Avatar
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    Re: Bailout size?

    Quote Originally Posted by diverklondike  View Original Post
    What did your instructor teach you on this topic?
    Instructor?
    We have RBW why would I need training?

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    RBW Member sjk is an unknown quantity at this point sjk's Avatar
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    Re: Bailout size?

    why would you want to do a no deco dive to 40meters on a ccr? that gives you 10 mins bottom time. I doubt many people here plan bailout for non deco dives at 40 meters.

  5. #5
    RBW Member Packhorse is a glorious beacon of light Packhorse is a glorious beacon of light Packhorse is a glorious beacon of light Packhorse is a glorious beacon of light Packhorse is a glorious beacon of light Packhorse is a glorious beacon of light Packhorse is a glorious beacon of light Packhorse is a glorious beacon of light Packhorse is a glorious beacon of light Packhorse is a glorious beacon of light Packhorse is a glorious beacon of light Packhorse's Avatar
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    Re: Bailout size?

    Quote Originally Posted by sjk  View Original Post
    why would you want to do a no deco dive to 40meters on a ccr? that gives you 10 mins bottom time. I doubt many people here plan bailout for non deco dives at 40 meters.
    Why wouldnt you? If you have a CCR you are going to want to use it for most of your diving right?

    Also 40 meters may only be the max depth. The few CCR dives I have done max 40meters have all been no deco dives and have all been considerably longer than OC divers I was with.

    I simply wouldnt even consider doing a 40mete4r dive with no bail out. I would be very surprised if many would.

    Submis, I do think you are being a little over conservative.
    I dont feel 50 bar for inflation and another 50 bar reserve makes sense considering the wide range of tank sizes.
    Last edited by Packhorse; 28th May 2010 at 03:03.

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    RBW Member Packhorse is a glorious beacon of light Packhorse is a glorious beacon of light Packhorse is a glorious beacon of light Packhorse is a glorious beacon of light Packhorse is a glorious beacon of light Packhorse is a glorious beacon of light Packhorse is a glorious beacon of light Packhorse is a glorious beacon of light Packhorse is a glorious beacon of light Packhorse is a glorious beacon of light Packhorse is a glorious beacon of light Packhorse's Avatar
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    Re: Bailout size?

    Quote Originally Posted by sjk  View Original Post
    why would you want to do a no deco dive to 40meters on a ccr? that gives you 10 mins bottom time. I doubt many people here plan bailout for non deco dives at 40 meters.
    Why wouldnt you? If you have a CCR you are going to want to use it for most of your diving right?

    Also 40 meters may only be the max depth. The few CCR dives I have done max 40meters have all been no deco dives and have all been considerably longer than OC divers I was with.

    I simply wouldnt even consider doing a 40mete4r dive with no bail out. I would be very surprised if many would.

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    RBW Member sjk is an unknown quantity at this point sjk's Avatar
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    Re: Bailout size?

    Quote Originally Posted by Packhorse  View Original Post
    I simply wouldnt even consider doing a 40mete4r dive with no bail out. I would be very surprised if many would.
    I meant I've not planned bailout for a 40m no deco dive i always plan my bailout assuming deco. I imagine a lot of people are similar to this, the only no deco dives I've done on ccr would be in the 0-20m range. i wouldn't do a 40m dive without bailout either.

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    RBW Member Gobfish1 has a reputation beyond repute Gobfish1 has a reputation beyond repute Gobfish1 has a reputation beyond repute Gobfish1 has a reputation beyond repute Gobfish1 has a reputation beyond repute Gobfish1 has a reputation beyond repute Gobfish1 has a reputation beyond repute Gobfish1 has a reputation beyond repute Gobfish1 has a reputation beyond repute Gobfish1 has a reputation beyond repute Gobfish1 has a reputation beyond repute Gobfish1's Avatar
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    ybod

    Re: Bailout size?

    Quote Originally Posted by sjk  View Original Post
    I meant I've not planned bailout for a 40m no deco dive i always plan my bailout assuming deco. I imagine a lot of people are similar to this, the only no deco dives I've done on ccr would be in the 0-20m range. i wouldn't do a 40m dive without bailout either.

    funny ,, i did my mod1 with out off board gas ,, and we bailed out from 30m a good few time,s at the end of the dive ,, in board 3l air dill

    even has gas to do a few stop s just for fun ,, plus has a shed full of o2 if you went in to deco

  9. #9
    RBW Member cameron is just really nice cameron is just really nice cameron is just really nice cameron is just really nice cameron is just really nice cameron is just really nice cameron is just really nice cameron is just really nice cameron is just really nice cameron is just really nice cameron's Avatar
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    Re: Bailout size?

    Quote Originally Posted by sjk  View Original Post
    I meant I've not planned bailout for a 40m no deco dive i always plan my bailout assuming deco. I imagine a lot of people are similar to this, the only no deco dives I've done on ccr would be in the 0-20m range. i wouldn't do a 40m dive without bailout either.
    CCR is great for no decompression diving. hit 30 or 40 meters and then ride the no-deco curve up the wall and turn it into a 3 hour dive. Only need a 30 for bailout and you have scads of time.

    Cam

  10. #10
    RBW Member robinfante is a glorious beacon of light robinfante is a glorious beacon of light robinfante is a glorious beacon of light robinfante is a glorious beacon of light robinfante is a glorious beacon of light robinfante is a glorious beacon of light robinfante is a glorious beacon of light robinfante is a glorious beacon of light robinfante is a glorious beacon of light robinfante is a glorious beacon of light robinfante is a glorious beacon of light robinfante's Avatar
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    HammerMeg, Sidemount Prism,

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    Re: Bailout size?

    for anything over 30m I bring a pair of AL80 (11l) cylinders. Since they are sidemounted I don't really even know they are there.

    Less than 30m I might change it to a pair of AL40's. Or not. I like to bring lots of gas.

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