RIA Novosti informs about it with reference to the project operator Nord Stream 2 AG.
"The pipe-laying vessel" Akademik Chersky "left the port of Wismar and headed to the Kaliningrad region to conduct sea and pre-operational tests," the message says.
It is noted that "after their completion, the vessel will begin pipe-laying work in the exclusive economic zone of Denmark."
It is also reported that Nord Stream 2 AG "sent the necessary notification to the Danish Maritime Administration (DMA), all work will be carried out in accordance with the obtained permits."
Earlier, Uniper assessed the progress of construction of the Nord Stream 2 gas pipeline.