This site has a great animation of the crash, including the leaked radio communications: https://www.vg.no/spesial/2018/helge-ingstad-ulykken/ Click "Helge Ingstad natt" to see the POV from the frigate. "Styrbord" means starboard/right, that's basically all the Norwegian you need to know.
Why doesn't the tanker have better lighting at the back of the ship? It seems to only be easily visible on the front-side from far away. Although I'm not trained to be able to spot a dark ship against the horizon it looked pretty challenging using the night view.