Salvage /recovery question

aquaxel

oooooook then...

besides the legal aspects, - thats how i would do:

rig a fat line (with little stretch) to the surface and a 2nd line with a marker buoy attached to wreck (so u find it again when the lifting breaks).

attach 1 or 2 1ton lift bags (or 5 ton bags) (with deflation valve) about -5m below surface.

lift till bags are on surfce to get wreck off the muck.

deflate

attach bags to wreck and lift with dead slow filling to surface.

more expensive: use ready bags additional on wreck besides the shallow bags. that will safe a lot of rigging time.

in this case when the boat is safe off the floor use them for final lift.

if u dont have proper liftbags u can use plastic drums with netting. but they dont have deflation valve.

whatever u do !!! : fill lifts extreme slow, first to neutral as lift usually goes suddenly aprupt and fast.

for gas u can use attached cylinders to lift bags/drums. if u carry them on u u get less hydrodynamic and escape in case of break is slower and higher increased risk. entanglement risk is also higher.

and always make sure that nobdy is in way (minimum divers) during the lift or at the surface in lift area. additional keep in mind that lift rigging can break and the whole thing comes down again like a rocket usually in ways u wont expect.

so - always keep clear!

have a cutting device ready.

when u succeed to get that thing to the surface consider ways for towing (boat) incorporating weather, wind, currents and of course other navigational traffic.

note: towing with attached liftbags is delicate and i dont know how far u have to go, but that thing may be quite a drag plus u may loose it somewhere on the way which then can open a whole other can of worms (legally).

if u do the lifting on rebreather it is another great task as the rigging and lifting is a busy job so i recommend that u dont forget that u r attached to a complex life support machine.

lifting goes sometimes abrupt - keep it dead slow and check as often as possible thru all stages during filling.

good luck.

let us know how it went

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rgds aquaxel

www.aquatec-innerspace.com

carcharodon1957

Steve and aquaxel gave you both really good info and prevents!!!
Just Adding closed liftbags if possible, really much safer to work with!
No deflation, and much easier to tow!
In case of emergency during back trip, Try to not exeed primary depth
A longest way back could be more safe!

And working step bay step at 5 meters is also much easier and safe to manage wreck, air needed for liftbags!

Just keep in mind when the boat will be close to surface to not avoid the marking boye, let it in place to prevent another lost!

cheers
Bernard

Freef

Do you know where the anchor was, how busy the waters were, what the bottom conditions would be like or anything about the anchor?

Perhaps divethelermotov didn't WANT to do the lift anyway, and one way of getting out of the job while keeping the locals on your side is to say that you need more than you do-but maybe the crane barge would be needed if you couldn't tow the anchor to a shallow spot.

How would you lift a 12' anchor up the beach? Perhaps there wasn't a beach, instead a harbour wall 10' tall.

These are all things that would be considered by a commie diver before asking for equipment. Do you have a crystal ball that lets you see a job from behind your keyboard?

If you do, can you share how you would lift the boat?

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David.

Currently owner of two differently sized ankles.

Numpty diver

Will lift the boat by hand, sofnalime cans will make it pretty light .
Or fix rope block under the buoy.. rope goes through block to boat then is attached to a weighty object...
The paragon seems to be hated ,maybe get a few of them together , put them in a bucket and use this as the weight ... Dave wanna arrange this ??
Anyone have the padi standards for search and recovery course ?

aquaxel

padi? ... - no comment - ...

try this:

SEA 00C2 Salvage Publications and Technical Documentation

here is a salvage manual: The Commercial Diving Directory

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rgds aquaxel

www.aquatec-innerspace.com

UKSteve

Guess it would be something to do with looking for the Instructor's lost Rolex? Conducted in no more than 30ft of water?

PADI search Recovery Specialty course open water training


Steve

Numpty diver

Thank you Aquaxel , theres some really good reading there.
I checked out you web site .. impressive.

Thanks steve .. no mention of depth on standards perfect !

carcharodon1957

Without polemics,
forget PADI recreational activities, especially for duty work!

Lifting so big item is a job.

cheers
Bernard

Freef

Yes, I do-i found an old manual the other day in a clear out.

No depth limits, although below 40m is 'non recreational' and the maximum weight to be lifted is 45 kg.

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David.

Currently owner of two differently sized ankles.

dave-diving

Dean
Don't bother lifting it as one unit, too much work and I know you don't like that!. Blow the sh** out of it with C4 and then pick up the pieces at leisure later. You can then do what you are planning to do and get it to the scrappers in ready cut up pieces and get the beer moneyfor the boys. A bonus is likely to be a few salmon floating to the surface due to concussion and not one knot to tie as your grannie knots are individual works of art and would use up your dive time!

You can use that clandestine military training of yours to good effect by declaring a new distinctive speciality- Deep wreck destroyer and CCR salmon poacher as well as good old underwater search techniques to find the bits to weigh in!

Don't forget to debrief around the Statoil hot chocolate machine!
D.

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"Never argue with an idiot. They drag you down to their level, then beat you with experience."