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Recreational overheads, especially wrecks

Discussion in 'Advanced Scuba Discussions' started by boulderjohn, Aug 22, 2018.

  1. boulderjohn

    boulderjohn Technical Instructor Staff Member

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    A couple weeks ago someone posted a link to a video of a wreck dive near Fort lauderdale in Florida. I think the video shows the kind of swim-throughs that most divers could look at and say, "Yeah, I can do that." It was, in fact a different video of that same wreck that I used to pose my question as to why even graduates of the wreck diving class were forbidden to make those swim-throughs, which is what eventually led to the new wording.

    Tracy Wreck | Fort Lauderdale Wreck Dive
     
  2. boulderjohn

    boulderjohn Technical Instructor Staff Member

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    If it was 50m deep, it was beyond the limits for cavern diving for all the agencies I know. It is also beyond the maximum depth for non-technical divers in all agencies I know, even in the open water.
    Where was this? In the places I know, anyone taking divers on a guided cavern dive (and, es, you can do guided cavern dives without cavern certification) must be cave certified and must be wearing suitable gear for a cave diver, which would include doubles and a long hose.

    it sounds like you experienced a lot of standards violations in that dive.
     
  3. EireDiver606

    EireDiver606 DIR Practitioner

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    No it was not 50m deep, I should have clarified. Around 15-20m depth and around 50m horizontally.

    In Malta. Was right after my fundies course so I should have known better. Some of the areas had air pockets I was told, but not most of them did not. To their knowledge there was 1 OW Diver with 12 dives and I was only an OW (to their knowledge). So 2 PADI OW divers going in a group through caverns for 50m without any training or appropriate equipment.
     
  4. dberry

    dberry Hydrophilic ScubaBoard Supporter

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    Which swim-throughs in that video are you referring too? All of them?
     
  5. boulderjohn

    boulderjohn Technical Instructor Staff Member

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    The first few.
     
  6. Jay_Antipodean

    Jay_Antipodean Barracuda

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    rookie terminology question: what does one call (if anything) a DM guided wreck dive (on a sanitised WWII ship) that is not a swim though (mostly not having two visible exit points) and that is not a penetration (exit point is different than entry, no line laid)?
     
  7. Steve_C

    Steve_C Divemaster

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    To me it is a penetration. To me whether it is a penetration is independent of human action like laying a line. However, penetrations vary greatly and in some cases where there are no restrictions, there is no chance of silt stir up or getting lost, they are treated by knowledgable divers as a swim through. There is one like that I like on the Hyde. But just my interpretation. But that is just my interpretation of the term.
     
  8. boulderjohn

    boulderjohn Technical Instructor Staff Member

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    Are you talking about Chuuk (Truk Lagoon)?

    There is no terminology I know for it. You are trusting the guide to know his or her way around the ship. In the cases where I have seen it done, there is no danger of a silt-out, so at least that danger is missing. That means you have to trust the guide to know the way.
     
  9. Jay_Antipodean

    Jay_Antipodean Barracuda

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    I was thinking more of Coron.
     
  10. Diver-Drex

    Diver-Drex Nassau Grouper

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    This is possibly still a standards violation. At 20m depth you are allowed 20m of linear overhead. So there could be a stretch where you have exceeded 40m of total distance from the surface, 20m depth and 20m into a 50m long passage. So worst case is 45m from the surface.
     

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