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Thread: How to shoot a 2,000lb liftbag

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    How to shoot a 2,000lb liftbag

    Here is the bottom video from a recent project where we shot the 1,500lb anchor crossmember from the Oregon to the surface. Scary stuff, be careful if you ever attempt it!



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    Tempest Dive Boat/ EastCoastWreckDiving.com

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    Re: How to shoot a 2,000lb liftbag

    Wait til you shoot 10k or 50k lift bags. That's where the real fun is.

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    Re: How to shoot a 2,000lb liftbag

    A couple of years ago, a few mates and I were asked to help lift a trawler off the bottom of the harbour where it had sunk a week before. The owner had organised a bunch of 1 and 2 tonne bags, a compressor and a high flow water pump. Plan was to lift it to the waterline and pump her out.

    My buddy and I did a dive to survey, a dive to tidy or rope up things like a 44gal full of chain so we didn't have to worry about getting crushed or pinned, then weather kicked us out and it was back to work for a week.

    The plan from then was to run slings under the hull, make a bit of a web of them to stop things sliding about, put bags low on the slings (ie below the gunwhales) so that they'd be underwater whilst the deck was dry when she came up, then work around the boat filling bags gradually and evenly.

    Got back the next weekend to find he'd enlisted the help of some other guys - also recreational divers who had never done anything like this before - but these muppets had tied lift bags to the bollards and deck rails.

    Fine, we kept going with the slinging thinking that when the dummy bags surfaced we'd untie, empty and re-use them lower down.

    So I'm filling a bag when all of a sudden there's a percussive boom, splinters and murk filling my world. Looked up to see three bags which had been tied to some railing disappear upwards - they'd pulled a great bloody chunk off the side of the boat. 6 tonnes of lift will do that to shonky timber.

    Crazy amounts of lift when they're not used right.

    We abandoned the project shortly after that - our suggestions were being ignored, the owner was throwing in mates who'd never dived before on his hired scuba unit and it was all just turning into a massive cookpot for a fatality that we had no interest in being part of.

    Two years later, to my knowledge, the boat is still there under the jetty.

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    Re: How to shoot a 2,000lb liftbag

    Small stuff is easy to shoot, for larger objects it SO much easier to do a long lift but hardly any recreational divers bother.

    You rig your target as usual then shoot a DSMB or small lift bag with a heavy line to the surface. If necessary add a bag or two to the target to reduce its overall weight.

    Then put your primary lift bag (whatever sized required) on that line at 6mtrs or similar depth and fill it as required, it will lift the target off the bottom safely well away from the divers.

    Then you simple haul your target up from the boat.

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    Re: How to shoot a 2,000lb liftbag

    Quote Originally Posted by Ben Field  View Original Post
    Small stuff is easy to shoot, for larger objects it SO much easier to do a long lift but hardly any recreational divers bother.

    You rig your target as usual then shoot a DSMB or small lift bag with a heavy line to the surface. If necessary add a bag or two to the target to reduce its overall weight.

    Then put your primary lift bag (whatever sized required) on that line at 6mtrs or similar depth and fill it as required, it will lift the target off the bottom safely well away from the divers.

    Then you simple haul your target up from the boat.
    The main anchor section was lifted with a cable winch attached at the bottom. Sadly our boat doesn't have one as of now. It's definitely on the wish list though!

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