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Video from a Training Dive with John Chatterton

Discussion in 'Technical Diving Specialties' started by Zack-Bloom, Sep 9, 2019.

  1. johndiver999

    johndiver999 Manta Ray

    # of Dives: 500 - 999
    Location: Gainesville FL
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    Thanks for the responses. I read your response as confirmation that the initial ascent rate was 60’feet perminute for the full minute and this was intentional and an integral part of the training. I don’t have one of those high end computers, but I think mine would complain a little about it. If that’s what the curriculum includes, I’m not trained enough to question it further.

    With respect to the smb, you asked what problems that technique might cause. First I think it is unnecessary. Why delay your ascent initiation and play with the smb, why not just start going up? Anything that unnecessarily delays initiation of ascent would seem to be something to avoid.

    The next issue is the ascent. Why occupy one of your hands to control an expanding smb? If an emergency occurs, air share etc. having your hand unnecessarily occupied would be undesirable.

    The next issue is that the air in the smb would be expanding, so every second of the ascent would make it harder to hold. If you drop it and it flies away then you would start sinking.

    Also another negative is that you indicated you can just let go if something happens. If you intend to let go, but screw up and get entangled in it when it is close to full, now you have a potential for a run away ascent. If on the other hand you are releasing from the bottom or 40 feet, you don’t have to put much air in it, so if you release and get entangled, you have a much better chance of salvaging the situation because the smb is only marginally inflated.

    I just don’t see the value of delaying the ascent, occupying a hand and complicating the ascent and buoyancy control for seemingly no benefit.

    The negatives of this practice are pretty clear to me, and possibly they could be offset by some advantages, but I am struggling to come up with any benefits of that strategy
     
    shoredivr and CptTightPants21 like this.
  2. njdiverjoe

    njdiverjoe Nassau Grouper

    # of Dives: 200 - 499
    Location: NJ
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    The wrecks down there can have some pretty wicked current. I'm a NE diver, but when I did my ccr trimix down there, there was an emphasis placed on getting a bag/smb to the surface before leaving the wreck so the boat could track you during deco.

    We rode bags up to our first stop as well, because if you have to shoot it anyways...
     
    rjack321, kensuf and Kha like this.
  3. johndiver999

    johndiver999 Manta Ray

    # of Dives: 500 - 999
    Location: Gainesville FL
    737
    625
    93
    Exactly, you either launch from the bottom or put air in the bag at the first stop and release, but the procedure taught is neither of those.
     
  4. ChuckP

    ChuckP Manta Ray

    # of Dives: 200 - 499
    Location: Cozumel
    506
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    Fixed it - that came after trying to condense and get under the max words for a post

    There are many instructors out there that teach differently and at the more advanced level, the methods of teaching can vary widely - just like the diving we all do.......

    I forget who, but a tech instructor I believe recently talked about taking a deco class in a cave, he requires his students to complete one open water deco dive also - something to the effect that cave deco is easier than open water drift deco, something I never really thought about but it goes to the thought that diving can and is different - one system will never best case apply to all diving.

    You the potential tech student that might be reading this - think for yourself as to how you plan to dive in the future, how is this new training going to help you see what you desire to see and see it safely. Search out an instructor that teaches in a way that will benefit you the most - the famous guy might not be it. Find an instructor that will focus on the things you feel are the most critical, I have to believe, the more comfortable you are, the more you'll learn.
     
    Dark Wolf likes this.
  5. Heat Miser

    Heat Miser Angel Fish

    # of Dives: 100 - 199
    Location: Perth
    18
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    Advantages:
    1. learning how to use a back-up buoyancy device
    2. learning to inflate it in a neutrally buoyant manner. (so you knees aren't touching that delicately handcrafted oxidizing US steel :)
    3. a line pointing an approximate direction to surface (current dependant)
    4. a marker so that the boat captain/dive master know where you going to be on surface.
    5. a marker so other recreational boats don't run over you, when you surface.
     
  6. ls23

    ls23 DIR Practitioner

    # of Dives: 100 - 199
    Location: Germany
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    I don't think anyone is arguing against the practice of shooting an (one!) SMB to have a reference in open water and mark your position for the boat. The strange part is actually riding it up and hanging on to it for deco. It just seems like a crutch for a lack of ability in proper ascents and holding stops that just complicates things unnecessarily.
     
    Heat Miser likes this.
  7. Heat Miser

    Heat Miser Angel Fish

    # of Dives: 100 - 199
    Location: Perth
    18
    22
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    I know I'm going to try it and make up my own mind.
     
    Dark Wolf likes this.
  8. kensuf

    kensuf Cave Instructor

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    THIS!

    In July I got to deco in a 4kt current. People were still talking about "that day on the Hydro" when I was there this past weekend.
     
  9. kensuf

    kensuf Cave Instructor

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    That was me.

    I had a normoxic class down in Pompano this weekend doing their final two dives off a boat. They're both cave divers, it pushed them outside of their comfort zones but after the weekend was over they both agreed the experience made them better.

    69686541_10217380993270071_2804881701786877952_n.jpg

    69537802_10217380993790084_7350370609051729920_n.jpg
     
    Dark Wolf likes this.
  10. Zack-Bloom

    Zack-Bloom Angel Fish

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    FYI Now that the furor has died down I took the video down for a bit to fix a couple things. It will be back soon.
     

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