Thanks Islanddawn for the links I read them with interest.
Not so much on the subject here, but have you some comments on this:
http://www.bbc.com/news/blogs-news-from-elsewhere-41415952Also off topic but about underwater archaeology:
http://www.grotte-de-han.be/en/prehistohanDuring my visit last year that was the most exiting of the Caves of Han that I have seen. I searched for videos but have nothing found. They make too much advertisement with their caves and don't put enough emphasis on this even for Europe interesting research. (Will tell it to them
)
But as I have seen your film, it is exactly the same system that they used during their research. A raft on 6 our 8 empty drums of 200l a pump linked to a plastic flexible tube of a 12 cm diameter and then pumping (sucking?) the sand and the artifacts with the water on the raft. And with that primitive vehicle they have done all their extraordinary finds, as a safety pin (yes a safety pin!) from the Bronze age, also golden coins and even stuff from the stone age.
Kind regards, Paul.