MAN Energy Solutions has won a fourth order to supply engines to Chinese shipbuilder COSCO Heavy Industries in Qidong for the construction of a second F-Class installation vessel used for the installation of offshore wind turbines and foundations. The previous three orders were for engines for two X-class and another F-class vessel. All four vessels are bound for Danish service provider, Cadeler, which specialises in offshore wind transportation, installation, operation and maintenance as well as decommissioning. The four vessels are scheduled for delivery from 2024 through 2026. X-class vessels are designed to operate at some of the most difficult sites around the globe with a deck space of 5,600 m2, a payload of over 17,600 tons and main crane capacity >2,000 tons at 53 metres. The F-class has similar specifications but is uniquely flexible and can be quickly converted from a foundation-installation unit to a wind-turbine-generator installation vessel. Each vessel will feature an engine configuration based on a mixed MAN medium- and high-speed engine concept with 2 × 6L32/44CR + 2 × 9L32/44CR + 2 × 12V175D engines. As a result, the newbuildings will have the greatest lifting capacity of any vessel ever seen in the field in line with the growing size of modern wind turbines. Each engine will also feature SCR (Selective Catalytic Reduction) and meet IMO Tier III emission standards. The F-class jack-ups will be able to transport and install seven complete 15MW turbine sets per load or six sets of 2XL monopile foundations per round-trip – a substantial improvement in efficiency over existing vessels. The vessels will also feature a unique design that enables their conversion from foundation-installation to wind-turbine-installation vessels (WTIVs).