Nord Stream Pipeline
Castoro Sei in Rotterdam
Before pipelaying could start, the Castoro Sei pipelay vessel was retrofitted at the Port of Rotterdam in February 2010. A new welding system and heavy-duty tensioners that hold the pipeline in position were installed, as well as stinger - the external ramp which will provide support to the pipeline when it is slowly released.
Source for the image and text, is owned by Nord Stream AG