Kongsberg Maritime has signed a new contract to supply technology and engineering for a second F-class wind turbine and foundation installation vessel (WTFIV) for Cadeler.
This is the fourth Cadeler offshore installation vessel for which Kongsberg Maritime will supply its technology.
Cadeler’s F-class vessel will be one of the largest installation vessels in the offshore wind market when completed.
Kongsberg Maritime’s integrated solutions for offshore installation vessels will “ensure operational stability, speed, and safety”.
The optimised thruster package, electrical solutions, and integrated control system, including dynamic positioning system, allow operations in all weather conditions and include digital tools needed to improve sustainability and reliability.
“We are pleased and honoured that Cadeler continues to see us as one of their strategic partners in delivering state-of-the-art technology required by the offshore wind industry,” said Halvor Økland, Tender Engineering Director, Integrated Solutions at Kongsberg Maritime.
Cadeler operates two, highly efficient offshore installation vessels and it is building four more; two X- and two F-class vessels.
When these vessels are complete, Cadeler will have the world’s largest and most capable fleet of jack-up vessels in the offshore wind industry ready to meet growing market demands.
The first F-class vessel is already booked until 2030.
“The decision to build another F-class vessel is based on the strong market demand for assets specialising in installing foundations.
“Our yet-to-be-built F-class vessels have already been sought after by our customers,” said Cadeler’s Chief Executive Officer Mikkel Gleerup.
The F-class vessel will have 5,600m2 of deck space and a payload of more than 17,600 tonnes.
The F-class has a unique hybrid design that allows the vessel to convert from being a foundation installation vessel to a wind turbine installation vessel within a short period of time, offering flexibility for project developers.
The vessels will be able to transport and install seven complete 15MW turbine sets per load or six sets of 2XL monopile foundations, cutting down the number of transits needed for each project.
The new F-class WTFIVs will support the largest dimensions in the offshore wind industry.
Construction of all Cadeler’s vessels is taking place at COSCO Shipping Heavy Industry’s shipyard in Qidong, China, and they will sail under the Danish flag.
The latest F-class vessel is to be delivered in the second half of 2026.


