1. Professor Emeritus, Dept. of Marine Technology, Norwegian Univ. of Science and Technology (NTNU), Otto Nielsens vei 10, NO-7491 Trondheim, Norway (corresponding author).
2. Professor, Dept. of Mechanical and Structural Engineering and Materials Science, Univ. of Stavanger (UiS), Kjell Arholms gt. 41, NO-4021 Stavanger, Norway. ORCID: .
3. Professor, Dept. of Marine Technology, NTNU, Otto Nielsens vei 10, NO-7491 Trondheim, Norway.