Baltic Sea - Ocean Explorer Divers Update!

A recent article from Sweden looking at the divers own description of what they saw on the bottom of the Baltic sea. The question is could this large object
Divers description 7 drawing:
The circle is 80 meters deep.  The object as above is circular and has a diameter of 60 meters and It looks like a staircase to the left based on the divers' videos and other observations.  Studies show that the