View non-flash version
and also for dened unplanned/emergency winter operations, when the operation will be done in sea ice. A study for an offshore intervention vessel was carried out in 2012. e vessels main operational tasks should be light sub- sea intervention/maintenance through the moonpool, and inspection by use of a remotely operated vehicle. e nal design (hull form/bow shape) was optimized for all-weather conditions. Together with the specied propulsion con- guration, the vessel oers particularly good seakeeping abilities, st ationkeeping perfor- mance, and a high service speed in both calm water and waves. e design verica- tion study included:? resistance and propulsion?towing tank test and computational uid dynamics ? Seakeeping and stationkeeping?ocean basin tests? Maneuvering?numerical simulations ? Ice resistance, propulsion, and initial turn -ing tests in ice?ice tankOpen-water tests were done by MARINTEK, while ice tests were done by Aker Arctic in Finland. MTPeter Christian Sandvik and Carl Trygve Stansberg are with the Department of Oshore Hydrodynamics at the Norwegian Marine Technology Research Institute AS (MARINTEK) in Trondheim, Norway. The Troll A natural gas platform, o the west coast of Norway, stands in a water depth of 303 m. Illustration courtesy of Norwegian Contractors/ Norwegian Petroleum Museum. January 2013 www.sname.org/sname/mt Learn More For further information on the activities cited in this article, check out the following Web sites. The Centre for Ships and Ocean Structures at NTNU: www.cesos.ntnu.no/ An Arctic research project managed by NTNU: www.marin.ntnu.no/arctic-dp/ The NTNU as host organization for the Centre for Research-based Innovation on Sustainable Arctic Marine and Coastal Technology,? a collab- oration activity with the Swedish Polar Research Secretariat: www.ntnu.edu/samcot OG21, oil and gas in the 21 century: www.og21.org The Norwegian Deepwater Programme: www.ndwp.org/ Maritime research and information strategy for the 21st century: www.maritim21.no/