Norway's Ministry of Defence is claiming NOK 15bn ($1.6bn) in damages from class society DNV GL over a collision that sank a frigate in 2018.
The Helge Ingstad went down off Norway following a clash with a Tsakos Energy Navigation-controlled tanker, the 113,000-dwt Sola TS (built 2013), after it left the Sture terminal.
The state has sued DNV GL over a new class certificate awarded in 2017 that was valid until 2021.
