The most volimunous and heavy item was a platform (like a pontoon) constructed with an aluminium-metal frame and wooden plank (with dimensions circa 2X5m. and weight 250-300kg). It might have been part of the infrastructure from an old water sport station that was operating years before and probably the platform was drifted and sunk close to the coast. Note that this particular water area was declared as archaeological site (prehistoric settlement) and only a couple years ago in 2018, they excluded a part of that bay and allowed us to scuba dive for recreational reasons. The reason was mainly that 200 meters from the shore an 80m cargo ship was sunk at -40m depth in '83, so they gave us the permission to visit it.
canopy cover made from asbestos fibers probably drifted to the sea and smashed form wind gusts during a storm. It might have been part of a land structure (small ηθτ) or part (roof cover for shade) from a fishing boat.
canopy cover made from asbestos fibers
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