Client references - Windfarm Projects

In 2011 DSB chartered the crew transfer vessels 'Maestro' and 'Deliverer' to 'Global Marine Systems' for work at the Thornton Bank Offshore Windfarm in Belgium. The vessels were used for personnel transport between cable lay barge and turbines on site.

Maestro is an 18m South boat Aluminium catamaran capable of speeds of 24 knots. She has a clear deck space of 16m2 aft and 32m2 fwd. Deliverer is a 14m South boat aluminium catamaran with an aft deck of 19.5m2 and 19m2 fwd. She has a maximum unloaded speed of 25 knots.

     DSB Offshore supplied a 14m Blyth Workcat for work on the Barrow Offshore Windfarm, Spring 2011.

      The vessel was used to repair the Transition Piece (TP) access ladders on all monopoles and the substation. 

      Subsequently the catamaran was used in the cleaning of the 25 monopoles. Pressure washer cleaning
      removes marine growth, seaweed, barnacles and encrusted bird droppings from platforms, ladders
      and other structures, an essential part of offshore wind farm operation and maintenance (O & M).

      Barrow Offshore Wind Ltd. is the consortium behind the Wind Farm with the shares distributed equally
     between Centrica and DONG Energy.

    DSB Offshore supplied a vessel spread to support cable barges AMT Discoverer for cable laying 
    for the Greater Gabbard Offshore Windfarm. 

     The spread consisted of:
 
     -  Amstelstroom, anchor handling tug (AHT)
     -  BOA Mighty, anchor handling tug (AHT) for towage and support of cablelay barge 
     -  Voe Jarl, multicat for anchor handling and support
     -  Stemat barges 73/78 - equipped with 4-point mooring
     -  Crewboat Strider, Blyth 14m catamaran, used for crew transfer to monopoles

    At the time DSB was involved Greater Gabbard was the world's largest offshore wind farm in construction.
    It involves the installation of 140 Siemens 3.6MW wind turbines located around two sand banks known as
    Inner Gabbard and The Galloper in the North Sea, off the Suffolk Coast.

    Greater Gabbard Offshore Wind Limited is a 50/50 joint venture partnership between Scottish and Southern
    Energy (SSE) and RWE npower renewables. RWE npower renewables and SSE will share the electricity
    output 50-50.

- Stemat Oslo - four point mooring crane barge vessel equipped with Liebherr crane with a 60m boom
- Neptune Mariner, 43 ton bollard pull anchor handling tugboat / utility vessel
- Nova K, multicat type vessel, 31 ton bollard pull, conducting anchor handling

The cable repair was undertaken at Skegness beach on export cable of the Lynn and Inner Dowsing Offshore Windfarm. Project involved cutting out the damaged subsea joint and replacing it with two subsea repair joints and a length of 630mm2 cable. The damaged joint was excavated from the beach and cut out before the cable was lifted on board the repair vessel.

DSB Offshore supplied the jackup Odin and supporting anchor handling tugs for survey work on the London Array offshore windfarm in the Thames Estuary, September 2009.

 The vessel spread provided by DSB consisted of the following:
- Odin, jackup barge, with 300t crane
- Wolf, 46 tbp Voith Schneider, anchor handling tug
- Arion, 34 tbp voith Schneider, anchor handling tug

This formed part of the preparatory work prior to the construction phase of what is to become the world’s largest offshore wind farm. The project is being built by a consortium comprising DONG Energy (50%), E.ON (30%) and Masdar (20%). The first 630 MW phase is scheduled to have been completed by the end of 2012. With a capacity of 630 MW, it will generate enough energy to supply around 475,500 homes and displace over a million tonnes of CO2 each year.

In the summer months of 2002, Elsam constructed the world’s largest offshore wind farm at the Danish west coast. Building on experience gained at Tunø Knob (Tuno Knob) trial project, Horns Rev Offshore Wind Farm is located in the North Sea 14 - 20 kilometers west of Denmark. Four times larger than the previous largest offshore windfarm, construction work began in 2002 and was commissioned in early 2003. The windfarm comprises 80 Vestas V80 turbines on monopile foundations capable of producing 160 MW. 

DSB Offshore provided the following vessels:

- Shoalbuster Marlene was used for anchor handling operations during the construction phase working for MT Hojgaard as DSB's client.

- Fast crew transfer vessel Kila supplemented work carried out by the Eurocopter helicopters also working for MT Hojgaard as DSB’s client.

Since July 2006 Horns Rev Offshore Wind Farm has been 60 percent owned by the Vattenfall Group and 40 percent owned by DONG Energy.  

The Horns Rev project was a key landmark in the Danish Government’s ambitious energy plan. According to the plan, wind turbines with a total capacity of 4000 MW must be established in Danish waters before 2030.