In June 2022, the US and NATO carried out an extensive "training" exercise near Bornholm Island in exact area where Nordstream was sabotaged

One of the major "achievements" of the operation was the collection of over 200 hours of undersea data - data which presumably included precision mapping of the exact location of the Nordstream pipelines that was sufficiently precise for remote sabotage.

Four weeks ago, in August 2022, the UK trained Ukrainian specialists in the use of underwater drone.