UPDATE
The object may be the concrete anchor of the device, which also had to be fitted with stainless steel mesh, Swedish naval officer and warfare history expert Anders Autellus told Swedish newspaper Expressen. It would interfere with submarine radar signals and make them crash.
The mesh itself may well have eroded away over the decades, but the images of the object made by the Ocean X team exploring it show what appear to be holes, where it was attached to the foundation, he added.
Stefan Hogeborn, a member of the team, concurs, saying their find is located just under an important shipping route. German vessels carried many goods important for the war effort during the war, and Soviet submarines sneaking from the Gulf of Finland into the Baltic Sea targeted them.
‘Baltic UFO’ may be secret Nazi sub-trap