The crane on Brave Tern, Fred Olsen Windcarrier’s jack-up installation vessel, has been upgraded to enable it to work at greater heights.
A 20 m section was inserted into the main boom of the 800-tonne capacity crane, enabling it to reach a height of 120 m and install and maintain larger offshore wind turbines.
The project, undertaken by Damen Shiprepair Amsterdam in the Netherlands, required the unreeving of all of the crane’s wires before the boom could be lowered onto a support structure built.
It was then cut in two and a new section inserted and secured using flanges. Following the completion of the new boom the wires were re-reeved and a series of load tests conducted before the crane was certified ready for operations.
The upgrade of Brave Tern is part of a wider programme by Fred Olsen Windcarrier to bring both its jack-ups up to the standard required to meet the needs of the new generation of 8 MW plus wind turbines. As well as the crane boom extensions, the jack-up legs on both vessels have had an additional 14 m added.
Following the works at Damen Brave Tern is now ready to install the latest, high capacity wind turbine generators such as MHI Vestas Offshore Wind’s V164. The vessel can carry four complete units (tower, nacelle and blades) per loadout.