Aren't we talking about the image contained in your post,
in which two teams apparently are pulling on two blocks,
with rather short multi-line spans to some obscure, cage-like
contraption fixed on a hawswer? There is no detail there,
nor good sense, IMO.
--dl*
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The image is the one linked in reply number 2. If you click on the page, you are taken to an enlargement with magnification facility, and there is plenty of detail to be had, including the detail that Barry picked up re the apparent frailty of the windlass assemblies, the detail of the major load seemingly to be in the line from wharf to windlass to 'basket thing' to vessel, and the fact that the hauling team are hauling on a pulley anchor with a 1:3 mechanical (dis)advantage.
Another thing I just noticed - there are FOUR ends in the assembly - one on the vessel, one on the wharf, one at the pulley block and one after the hauling team. This begs the question of 'What on earth is going on inside the 'basket' object?'
@Barry, I think for recovery, the barrels will be empty and employed as buoyancy tanks in case the lifting vessels take water to prevent them from sinking along with the just recovered wreck...
Derek