Chinese yard Cosco Shipping Heavy Industry has clinched an order from Danish wind farm installation vessel owner and operator Cadeler to build an F-class jack-up vessel catering for the largest offshore wind projects in the industry.

The $345 million contract carries an option for Cosco to construct an additional X or F-class jack-up vessel.

The unit is scheduled to be delivered in the fourth quarter of 2025.

The F-class vessel can be converted from installation of large foundations to installation of wind turbine generators within a short timeframe, Cadeler said.

With a deck space of 5600 square metres and a payload of more than 17,600 tonnes, Cadeler claims the X and F-class vessels will be able to transport and install seven complete 15-megawatt turbine sets per load or five sets of 20-plus MW turbines.

The F-class vessel specifications also suggest it will be able to transport up to six XL monopiles weighing 2300 to 2600 tonnes each per round-trip.

This powerful capacity is intended to reduce the number of trips needed for each project.

The F-class vessel’s design allows it to convert from being a foundation installation unit to a wind turbine generator (WTG) installation vessel within a short period of time.

Cadeler is currently building two X-class vessels at Cosco’s Qidong facility, which will be delivered in the second half 2024 and first quarter 2025 respectively.

The new vessel will be built on specifications similar to the two X-class vessels, providing substantial scale benefits.

The Danish transport and installation contractor is targeting the growing segment of large-scale foundation installations.

Upon completion of the three new vessels, Cadeler said it will offer the largest capacity in the industry in terms of loading and ability to transport, service and install the largest offshore foundations and wind turbines.

The strategic partners for the large-scale newbuilds include GustoMSC NOV, Kongsberg, Huisman and MAN Energy.

Cadeler is currently in talks over an XL Monopile foundation installation contract in the North Sea, which is expected to commence in February 2026.

Chief executive Mikkel Gleerup said: “Developing our fleet is a key strategic priority to meet the increasing demand for installation capacity....We are proud once again to push the boundaries of our industry by providing the most efficient vessels to stakeholders developing increasingly complex projects.”

Cadeler is currently in talks over an XL Monopile foundation installation contract in the North Sea, which is expected to commence in February 2026.

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