Welcome to ScubaBoard, an online scuba diving forum community where you can join over 205,000 divers diving from around the world. If the topic is related to scuba diving, this is the place to find divers talking about it. 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.
  • Find a dive buddy or communicate directly with scuba equipment manufacturers.

All this and much more is available to you absolutely free when you register for an account, so sign up today!

NEW for 2014 Access SBlogbook for members. It allows you to directly upload data from your dive computer, validate your logs digitally, link your dives to photos, videos, dive centers (9,000 on file), fishes (14,000 on file) and much more.

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 22
Like Tree7Likes

Thread: How do you control ascent with a breathable power inflator?

 


  1. #1
    Registered


    Rookie Diver
     

    Join Date
    Mar 2012
    Location
    NYC
    Posts
    5
    Dives
    0 - 24

    How do you control ascent with a breathable power inflator?

    Hello All,

    I am a newly certified diver and just purchased my first basic set of dive gear. Instead of an octopus, my BCD has a breathable gemini power inflator. My question is: If a situation occurs in which I find myself breathing off of my power inflator, how can I use it to control ascent? During training, we were taught to hold it above our heads and either inflate or deflate as needed, but this seems hard to do if it is in ones mouth.

    Also, if I do need to put any air into my BCD can I take a breath at the same time?

    Thanks ahead of time for responses!

  2. #2
    ScubaBoard Business Sponsor
    Please visit our Sponsor Page!

    PADI Pro, author, scuba snob
     

    DivemasterDennis's Avatar
    Join Date
    Apr 2010
    Location
    Lakewood, Colorado
    Posts
    2,899
    Dives
    500 - 999
    Photos
    7
    Blog Entries
    51
    All of these things are possible without contortion. All you need to do is familiarize yourself with your new equipment. It is unlikely you will be breathing off your alternate air source low pressure inflator unless you are sharing air with another to whom you have donated your primary. In such an event, you will have likely dumped all you bcd air ( assuming you are not overweighted) prior to commencing you ascent. If not, you can still add/vent air while using the alternate air source. Practice in the pool or even in your living room. Ask you LDS, if you purchased it from them as opposed to online, to give you an orientation. You will do just fine.
    DivemasterDennis
    Wookie and rhwestfall like this.

  3. #3
    Registered


    sampling good bourbons while
    waiting for the ice to melt...
     

    rhwestfall's Avatar
    Join Date
    Feb 2011
    Location
    "La Grande Ile"
    Posts
    3,255
    Dives
    100 - 199
    yep - practice, practice, and practice. Just curious, does your BC have a "pull-to-dump"? As DD said, you should discuss it with your retailer and/or the person who certified you. You may catch a bunch of flack from some here about this type of system, but this is a fairly tried and reliable system. It is different from a "conventional" octo system. It is important to discuss the donation scenario pre-dive with your buddy as their gear and training may be different.....
    Bob



    getting a Kraken!!!!

  4. #4
    Registered


    Has not set a "status"
     

    elan's Avatar
    Join Date
    Mar 2009
    Location
    Toronto, Ontario, Canada
    Posts
    3,311
    Dives
    200 - 499
    There should also be another dump valve or two on the shoulder or on the butt. You can use those to dump
    rhwestfall likes this.

  5. #5
    NA


    Has not set a "status"
     

    dumpsterDiver's Avatar
    Join Date
    Jan 2006
    Posts
    6,211
    Dives
    2,500 - 4,999
    Quote Originally Posted by DivemasterDennis View Post
    All of these things are possible without contortion. All you need to do is familiarize yourself with your new equipment. It is unlikely you will be breathing off your alternate air source low pressure inflator unless you are sharing air with another to whom you have donated your primary. In such an event, you will have likely dumped all you bcd air ( assuming you are not overweighted) prior to commencing you ascent. If not, you can still add/vent air while using the alternate air source. Practice in the pool or even in your living room. Ask you LDS, if you purchased it from them as opposed to online, to give you an orientation. You will do just fine.
    DivemasterDennis
    Where in the world do you come up with this stuffffffff????? You dump all the air from the BC, before an ascent??

    You are unlikely to ever use the alternate inflator/reg unless you are sharing air with another diver???

    The most common scuba failure is a freeflow. Many divers will choose NOT to breath from the free flowing reg and use an alternative reg.

    As for the OP's original question, he needs to play with this gear in the pool. There is no way he will be confident using this gear in a real emergency based on some assurances from people on the internet. Yes you can dump air and breath, some people will want to remove the device from their mouth. Some people will say to use an alternative dump valve. Whatever method(s) are used, the diver needs to figure it out and practice it a bunch until it is second nature to them.. or they will be a hazard to themselves and others if they do not have the skills to operate their equipment.

    Once he has it down in the pool, then it is not that big of a deal to practice ascent using the alternative reg for normal dives.. Just practice it a little on real dives and it will not be hard.
    Peter Guy and rhwestfall like this.

  6. #6
    Registered


    searching for investment
    property near PDC
     

    Join Date
    Dec 2009
    Location
    St Louis, MO
    Posts
    183
    Dives
    50 - 99
    Just pull on the inflator hose, use the shoulder dump, assuming your BCD has 1. I use my shoulder dump almost exclusively, and I have an Octo but about to have an SS1.

  7. #7
    Registered


    Rookie Diver
     

    Join Date
    Mar 2012
    Location
    NYC
    Posts
    5
    Dives
    0 - 24
    Thanks for the feedback everyone! :-)

    Yes, it does have a dump valve.

    I'm heading to my LDS next Saturday to practice in the pool (I need to pick up a new mask anyway. Mine is too high volume and I had a lot of trouble clearing it on my first dive trip)

  8. #8
    NA


    Has not set a "status"
     

    dumpsterDiver's Avatar
    Join Date
    Jan 2006
    Posts
    6,211
    Dives
    2,500 - 4,999
    Quote Originally Posted by sdiver68 View Post
    Just pull on the inflator hose, use the shoulder dump, assuming your BCD has 1. I use my shoulder dump almost exclusively, and I have an Octo but about to have an SS1.
    That is sorta the problem, unless you have a neck that extends 12 inches at will, it is impossible (I think anyway) to have the device in your mouth and simultaneously utilize the pull dump device that is associated with the corregated hose. To use the pull dump on the inflater the device must be removed from the mouth.

  9. #9
    Registered


    sampling good bourbons while
    waiting for the ice to melt...
     

    rhwestfall's Avatar
    Join Date
    Feb 2011
    Location
    "La Grande Ile"
    Posts
    3,255
    Dives
    100 - 199
    interestingly enough, DD, I have been able to hold the unit in my mouth and, by pushing away from me in the "loop/arc" formed, I can trigger the dump. I do hear some ptd's are "stiffer", and this may not be possible (I have had success with DACOR and DUI models).

    I guess with the SP, it is all part of the system - the BC also has an independent PTD on the opposite shoulder (Classic series).

    Not sure how his products/brands are configured, so for him it may be quite different.

    In summary, yep, work it out with your instructor/LDS. And again, practice, practice, practice...
    Bob



    getting a Kraken!!!!

  10. #10
    Registered


    has no status, but we
    knew that already.
     

    Bob DBF's Avatar
    Join Date
    Oct 2009
    Location
    Sonoma County, CA
    Posts
    1,817
    Dives
    I just don't log dives
    Photos
    31
    Quote Originally Posted by dumpsterDiver View Post
    That is sorta the problem, unless you have a neck that extends 12 inches at will, it is impossible (I think anyway) to have the device in your mouth and simultaneously utilize the pull dump device that is associated with the corregated hose. To use the pull dump on the inflater the device must be removed from the mouth.
    The pull dump on my old BC with a Oceanic version of "air 2" has a a two peice hose with a hard plastic connector between them. A pull on the connector dumps the air leaving the reg in your mouth.

    I've been thinking about moving it over to my BP/W since it worked well for me over the years on the jacket. I'd have done it by now but it will take some re-engineering to refit the wing.


    Bob
    ------------------------------------------
    I may be old, but I’m not dead yet.
    rhwestfall likes this.

Page 1 of 3 123 LastLast

Similar Threads

  1. Replies: 5
    Last Post: August 1st, 2011, 07:33 PM
  2. How do you ladies deal with long hair?
    By luckydays in forum Women's Perspectives
    Replies: 70
    Last Post: July 11th, 2010, 09:04 PM
  3. How do you calculate weight with steel tanks ?
    By Glen Rushworth in forum Buoyancy Compensators (BC's) and Weight Systems
    Replies: 13
    Last Post: December 10th, 2009, 06:03 PM
  4. How do you stay balanced with a pony bottle?
    By DiverDAD! in forum Basic Scuba Discussions
    Replies: 16
    Last Post: August 4th, 2008, 12:18 AM

Tags for this Thread

Posting Permissions

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