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 3 years ago 

Compared to the drawing, it is, of course, more modern. I have used two options. One for depths up to 80 meters, it is practically the same as in the picture. Three-bolt diving equipment is called.
The other was deep water, for diving to depths of 200 meters. There, helium breathing mixture was supplied from the surface via hoses, and the equipment was really heavy in the air (more than 100 kg)

 3 years ago 

Wow!