Dear Joeri,
I don’t think I can really answer your question. When the OC3-Hywind specification document was originally published (nrel.gov/docs/fy10osti/47535.pdf), I was able to obtain information from Statoil regarding the specifications of the delta (“crowfoot”) connection, multi-segmented lines, and clump weight; however, at the time, Statoil requested that I not redistribute those details to the entire OC3 group. I’ve recently heard from others that they were able to obtain information regarding the mooring line details when they contacted Statoil. I suggest that you reach out to Statoil.
Best regards,