Wind Turbine Installation Vessel
A wind turbine installation vessel (WTIV) is a vessel specifically designed for the installation of offshore wind turbines. There were 16 such vessels in 2020. Most are self-elevating jackup rigs. To enable quick relocation in the wind farm it is self-propelled. It also has a slender ship shaped hull to achieve a quick turnaround time with the vessel carrying several foundations or wind turbines each time. Azimuth thrusters are used to position the vessel during jack-up operations. Some vessels use the thrusters in dynamic positioning (without jacking up) to keep the vibrating pile driver steady when installing foundations. Some may carry five modern wind turbines and lift 700 tonnes above deck. A vessel can cost $335 million, or $220,000 per day. A 3-year leasing may cost €90 million. The fleet of 16 vessels are scheduled to expand to 23 vessels by 2023, of which seven can handle the largest turbines. The fast growth of turbine size challenges even the largest ves ...
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