Welcome to ScubaBoard, an online scuba diving forum community where you can join over 185,000 divers from around the world discussing all things related to Scuba Diving. To gain full access to ScubaBoard (and make this large box go away) you must register for a free account. As a registered member you will be able to:

  • Participate in over 500 dive topic forums and browse from over 5,500,000 posts.
  • Communicate privately with other divers from around the world.
  • Post your own photos or view from well over 100,000 user submitted images.
  • Gain access to our free classifieds marketplace to buy, sell and trade gear, travel and services.
  • Use the calendar to organize your events and enroll in other members' events.
All this and much more is available to you absolutely free when you register for an account, so sign up today!

If you have any problems with the registration process or your account login, please contact the ScubaBoard Support Team.
Page 1 of 3 123 LastLast
Results 1 to 10 of 26


  1. #1
     


    Has not set a "status"
     

    pjones's Avatar
    Join Date
    Oct 2009
    Location
    Vancouver, B.C. in Canada eh!
    Posts
    308
    Dives
    25 - 49
    Photos
    17

    What is on their backs?

    I was surfing the Youtube and came across this video of Diving with Manta Rays...

    YouTube - Diving with Manta Rays

    I thought at first that they were diving with rebreathers but then noticed at a number of instances throughout the video that there were bubbles coming from their mouths. is this an "all in one" type bundle that there wearing? or is it that rebreathers actually expel gas at some point through their operation? It was always my understanding that rebreathers recycled the air and produced no bubbles..... however the more I think about it now the less that sounds correct since (if I understand correctly) in order to dive at different depths the mix needs to be adjusted and the added gas would need to displace existing gas.

    Maybe its just my understanding about rebreathers that needs to be corrected....

    Thanks
    "A lot of people attack the sea, I make love to it."
    Jacques Yves Cousteau

  2. #2
    Tech Diver


    has set a status
     

    Tortuga68's Avatar
    Join Date
    Aug 2008
    Location
    Shanghai, China
    Posts
    3,223
    Dives
    200 - 499
    There are Semi-Closed Circuit Rebreathers (SCR) as well as Closed Circuit (CCR). The mix is adjusted by the rebreather in the breathing loop
    "You may not agree with everything I say but at the very least you'll come to understand that your differing opinion is wrong"

    Best SB post ever: http://www.scubaboard.com/forums/3443054-post47.html

  3. #3
    Photographer


    Has not set a "status"
     

    scuga's Avatar
    Join Date
    Feb 2010
    Location
    Atlanta
    Posts
    159
    Dives
    25 - 49
    Maybe they are semi-closed circuit rebreathers?

  4. #4
    Frequent Poster


    Has not set a "status"
     

    Join Date
    Jul 2008
    Location
    Calgary/ Ann Arbor MI
    Posts
    120
    Dives
    50 - 99
    It looked like they just had regular open circuit regulators. Perhaps they are wearing some sort of tank backpack that is streamlined?

    They definitely aren't wearing normal looking scuba gear, but I think that they are still on open circuit.

  5. #5
    ScubaBoard Contributor


    hasn't set a status.
     

    Join Date
    Apr 2005
    Location
    Aurora, IL
    Posts
    914
    Dives
    200 - 499
    The lower right corner says Cousteau. They're well known for using tanks encased in a shell because it looks cool. My guess is that this is just regular open circuit scuba.

  6. #6
     


    Has not set a "status"
     

    pjones's Avatar
    Join Date
    Oct 2009
    Location
    Vancouver, B.C. in Canada eh!
    Posts
    308
    Dives
    25 - 49
    Photos
    17
    I've come across some more information that holds the answer to my question. It looks like its a system that utilizes both CCR and open circuit.

    Equipment | Ocean Futures Society

    Thats really cool! I've never seen anything like it before.
    Thanks to those who have posted such a quick response already
    "A lot of people attack the sea, I make love to it."
    Jacques Yves Cousteau

  7. #7
    Photographer


    Has not set a "status"
     

    scuga's Avatar
    Join Date
    Feb 2010
    Location
    Atlanta
    Posts
    159
    Dives
    25 - 49
    so they have 3 30's and a CCR under the hood? thats amazing.

  8. #8
    TC
    TC is offline
    Miscreant Moderator


    has an alibi.
     

    TC's Avatar
    Join Date
    Oct 2004
    Location
    Southern California
    Photos
    19
    That looks like an updated version of a tank system they used decades ago- It was basically three smaller (30ish) tanks manifolded together inside a plastic case.

    I'll see if I can find a pic.

  9. #9
    TC
    TC is offline
    Miscreant Moderator


    has an alibi.
     

    TC's Avatar
    Join Date
    Oct 2004
    Location
    Southern California
    Photos
    19
    Check the photo's at about post 64/65- I think the ones you see are an updated version of these.

    Triple Tank, Triple Manifolds!

  10. #10
    Mod


    Has not set a "status"
     

    diversteve's Avatar
    Join Date
    Apr 2004
    Location
    Phoenix
    Dives
    I'm a Fish!
    Photos
    3
    They're open circuit systems with small tanks under a cover. If you want to know more about them, PM Blair Mott that's probably him holding the light in the video. He's been their Chief Diver for over a decade.

Page 1 of 3 123 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  






Search Engine Friendly URLs by vBSEO 3.6.0