• 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

Broke even CCR vs OC fills costs!

Discussion in 'Technical Diving Specialties' started by northernone, Aug 16, 2017.

  1. Superlyte27

    Superlyte27 Cave Instructor

    # of Dives: 5,000 - ∞
    Location: Florida
    3,771
    2,824
    113
    Depends on your scrubber. None of the rebreathers I'm certified on have a 3 hour scrubber.
     
  2. Superlyte27

    Superlyte27 Cave Instructor

    # of Dives: 5,000 - ∞
    Location: Florida
    3,771
    2,824
    113
    As far as I can tell, that's a myth. I'm certified on 5 different rebreathers for more than 5 years now. In that time, I've never missed a dive because of a faulty rebreather. So far just this year, I have over 130 hours on the loop. Which is probably one of my weakest years in terms of diving. I have 7 close friends who also dive CCR exclusively. They have also never missed a dive due to a faulty rebreather.

    I do have a single friend who couldn't dive because his Oxygen sensor had expired and he didn't have a spare. But to me, that's just bad maintenance or poor planning. Kinda like having a regulator fail that hasn't been serviced in 5 years.
     
  3. Brandon

    Brandon Shop Independent Diver ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: Alaska
    1,619
    318
    83
    But I'm not in South Florida, am I? :wink:

    A Southcentral Alaska dive charter will cost you about $250 for a 2-tank dive day, or about $450 for the weekend. That's on the cheap side. There are also charters where it would cost you $350 to $500 for a single day of diving. Look at your math again - if your local charter rates were that expensive and you dove frequently, would it be worth owning a boat?

    I took my boat out 31 times this year, and even after accounting for ownership costs, I'm way ahead.

    This is an excellent example on how to accurately cost out CCR vs OC. You did the math the same way I did it for determining if my own fill station was viable, by looking at cost per CF for the OC gasses.

    I haven't yet reached the point where I'm going through 22,000 CF of trimix in a year... #lifegoals. :wink:
     
    Last edited: Sep 10, 2017
    shoredivr likes this.
  4. ajduplessis

    ajduplessis Solo Diver

    # of Dives: I'm a Fish!
    Location: dry land :-(
    3,256
    832
    113
    Do you then have 10 hour scrubbers?
     
  5. JohnnyC

    JohnnyC PADI Pro

    # of Dives: I'm a Fish!
    Location: United States
    3,392
    3,807
    113
    Scrubber life depends on a myriad of factors. Check out ISC's figures for the different size Meg scrubbers and you'll see how they rate theirs.

    They rate them quite conservatively. A manufacturer may quote a scrubbers duration at 4 hours even when it's capable of doing 10 given reasonable relaxed workload.

    A good example is the Meg 8lb radial. It's rated for a much shorter duration by the manufacturer, but it was used 10 hours in Plurdalen when those guys had that accident. Manufacturer ratings are very conservative by design. It's really up to the diver to determine how long they want to push their scrubber.
     
  6. ajduplessis

    ajduplessis Solo Diver

    # of Dives: I'm a Fish!
    Location: dry land :-(
    3,256
    832
    113
    I am amazed how CCR divers talk about break even cost vs OC and how cheap it is to dive a CCR, yet "inexpensive" consumables like O2 sensors and sorb is dived beyond the recommendations of the manufactures.
     
  7. LiteHedded

    LiteHedded Great White

    4,063
    911
    113
    that's nothing new. when cheapness is a motivating factor for buying the thing you'll see nonsense like this
     
    PfcAJ likes this.
  8. Superlyte27

    Superlyte27 Cave Instructor

    # of Dives: 5,000 - ∞
    Location: Florida
    3,771
    2,824
    113
    Yes, two of my ccrs have 10 hour scrubbers.
     
  9. TrimixToo

    TrimixToo Regular of the Pub

    # of Dives: 200 - 499
    Location: New York State
    1,002
    1,057
    113
    Not to take anything away from having several hours to deal with things on CCR, which to me is one of the compelling arguments for getting one, but why the heck did he not run a line?

    Losing orientation in a silted-out compartment (or a very tight silty passage) is not unusual, but the line always gets you out approximately as fast as you went in or faster, assuming you know how to run one to avoid line traps and such. Even on CCR, that's safer than having to wait for the silt to settle, and for some kinds of silt, it could be several hours before it does.
     
  10. lermontov

    lermontov Manta Ray

    # of Dives: 500 - 999
    Location: christchurch
    837
    400
    63
    i did read a story which may or not be the same one about someone who went into a room as a solo diver and was later followed in by another team who weren't so careful and that caused the silt out - either way its a good lesson not to take unnecessary risks
     

Share This Page