LOGISTIC ADVANTAGES The deployment of floating sheerleg cranes and jack-up vessels for the construction of offshore wind farms makes for very complex logistics. Constant trips back and forth using tugs and barges are needed to deliver the jackets or monopiles for installation. “The advantage of the F3000 is that it allows us to position and transport a large number of jackets or monopiles on the 6,500-square meter deck. Two 7.5 MW Rolls-Royce engines enable the vessel to reach a speed of 12 knots. After arrival at the location, installation work can start immediately, without having to wait for the time-consuming process of extending the legs of a jack-up vessel. Fewer transport movements are required, resulting in huge logistic benefits. Moreover, it results in a sharp reduction in fuel consumption and carbon emissions, a factor that is increasingly important to many clients. Another big advantage is that the DP2 system enables us to reposition the vessel quickly. Compared to jack-up vessels the F3000 will also be deployable in less favorable wave conditions, resulting in time savings, good workability and a predictable operating process. The helicopter deck means that offshore work can continue uninterrupted during crew changeovers,” said Nelemans. HORNSEA PROJECT ONE OFFSHORE WIND FARM Boskalis will deploy the F3000 for the transport and installation of the foundations for part of the Hornsea Project One offshore wind farm, which is being built 120 kilometers off the coast of Yorkshire, UK. Execution of the contract, which was awarded to Boskalis by DONG Energy Wind Power A/S in 2016, will start in the second half of 2018. “Before then we expect to be able to deploy the vessel on other projects,” said Nelemans. “The Hornsea project was a major factor in our investment decision. We were in talks with DONG for quite some time about the possibility of using a large transport and installation crane vessel for the transport and installation of the foundations on this project. Gradually everyone became more and more convinced of the economic benefits of this concept.” INSTALLATION, DECOMMISSIONING AND SALVAGE WORK The F3000 is also ideally suited for the installation of topsides and jackets as well as decommissioning activities, such as the dismantling and immediate removal of existing oil and gas installations or obsolete wind farms. “We also expect to deploy the vessel on subsea and salvage work,” said Nelemans. “The spacious accommodation means that we are able to house a large number of specialists, such as divers and welders.”
Artist’s impression of the F3000 carrying monopile foundations and transition pieces for an offshore wind farm.
F3000 SPECIFICATIONS Crane lifting capacity: 3,000 tons Available deck space: 6,500 m² Total installed power: 25 MW Transit speed: 12 knots Dynamic positioning:
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