Allseas Pipelay Vessel Solitaire in the Baltic Sea

Solitaire has a massive 22,000 tonne pipe-carrying capacity and work stations on several levels to enable it to receive and store the 12-metre long, 23-tonne pipes, weld them together, test the welds, join the pipes to the pipeline, and lay it on the seabed at a rate of about 2.5 to 3 kilometres a day.

Reference(s) for the image and text, is owned by Nord Stream AG