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Journal of physics / Conference Series 1357, 012019 (2019). doi:10.1088/1742-6596/1357/1/012019 special issue: "International Maritime and Port Technology and Development Conference and International Conference on Maritime Autonomous Surface Ships 13-14 November 2019, Trondheim, Norway" International Maritime and Port Technology and Development Conference, MTEC 2019, Trondheim, Norway, 2019-11-13-2019-11-14