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Friday, June 11, 2021 

Kongsberg Maritime (KM) has secured contracts worth about NOK 250m with China Merchant Heavy Industries (CMHI) to design and equip two construction service operation vessels (CSOV) for Norway-based shipowner Awind.

Destined for the renewable offshore wind market, the new CSOVs will be built by CMHI to Kongsberg Maritime’s UT 5519 DE design. Scheduled to be delivered in 2023, the vessels are designed with a clear focus on reduced emissions and enhanced sustainability. This focus is reflected by the comprehensive KM integrated equipment solution, which includes permanent magnet Azimuth thrusters, generators, electrical systems, a fully integrated bridge with navigation, DP and automation, deck machinery equipment and control systems.

“Awind’s determination to promote humane, environmentally-friendly safe and efficient operation is entirely consistent with Kongsberg’s mission to incorporate sustainability in everything we do,” said Jørn Heltne, VP Integrated Solutions – Ship Design Sales, KM. “This cooperation will have positive ripple effects across the entire organisation, as well as reinforcing Kongsberg Maritime’s market position in the growing renewable energy segment.”

The UT 5519 DE has a novel hull form and propulsion set-up, incorporating results from research and development projects as well as operational experience from KM’s wind farm service vessel designs. Propulsion is provided by four KM type US 255 L azimuthing thrusters, two forward and two aft. The thrusters are powered using highly efficient permanent magnet electric motors, mounted vertically. This set-up provides excellent manoeuvrability and station keeping capability and efficiency, important for a vessel that visits a large number of wind turbines each day, with operations comprising close quarters manoeuvring, station keeping and short transits.

The hybrid power system features energy storage systems and a DC main switchboard configured to provide spinning reserve, as well as actively delivering efficiencies during vessel operation through peak shaving, power boost and the possibility of short-term battery operation. This minimises the number of generators running and optimises fuel efficiency. The variable speed generator sets allow optimum specific fuel consumption even at low loads.

The vessel is designed to minimise environmental impact in other ways, including underwater noise covered by the DNV Silent(E) class notation, further representing how KM’s next-generation CSOV/SOV designs are prepared for the shift towards zero-emission operation. The layout of the vessel provides separation between work and living areas, allowing 24-hour operation and maintaining a high level of living comfort, with accommodation for up to 120 persons.

“We are very pleased to strengthen and build on our relationship with Kongsberg Maritime, both through the design and development phase and in the future, as we look forward to continuing to work together to ensure that our vessels operate as sustainably, humanely and efficiently as possible,” said Christopher Andersen Heidenreich, MD Awind.

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