Positive
Project advancing - milestone achieved
Low Impact
Minor progress or informational
In the early phase of the Gotland 1 HVDC project, before or around its 1954 commissioning, Vattenfall and ASEA carried out extensive environmental testing to determine the effects of using the Baltic Sea as the return current path on fish populations near the monopolar subsea cable between Västervik and Ygne. These tests were undertaken to assess and mitigate ecological impacts of the world’s first commercial submarine HVDC sea-return link.