Case Studies

Hornsea One

25 September 2019, installation vessel Bold Tern installed the last of 91 turbines on Hornsea One offshore wind farm. The complete wind farm consists of a total of 174 Siemens Gamesa SWT-7.0-154 turbines and is the world’s largest offshore wind farm to date. Hornsea One is located 120km from shore which is the furhest from shore an offshore wind farm has ever been built.

  • Bold Tern installed four turbines per cycle
  • The world’s largest wind farm will be capable of powering well over one million UK homes
  • Installation began 4 February and Bold Tern’s final turbine (no. 91 out of a total of 174) was installed 25 September

Hohe See and Albatros

20 September 2019, Brave Tern installed the last turbine on Albatros offshore wind farm – an extension to Hohe See. Installation at Hohe See was completed 12 August. Blue Tern worked in tandem with Brave Tern installing turbines on both Hohe See (71 turbines) and Albatros (16 turbines). The wind farms are located in the German part of the North Sea and will provide up to 710,000 households with clean energy.

  • Brave Tern and Blue Tern worked in tandem, each installing four turbines per cycle
  • This is the largest offshore wind farm project under construction in Germany
  • Installation of the 87 Siemens Gamesa SWT-7.0-154 turbines began on Hohe See 5 April

Horns Rev 3

In January 2019, Fred. Olsen Windcarrier finished transporting and installing 49 V164-8.3MW turbines on Horns Rev 3, 25-40 km off the Danish Jutland coast. The offshore wind park will supply enough energy for 425.000 Danish households with a capacity of 406,7MW.

  • Brave Tern installed four turbines per cycle
  • World’s most powerful wind turbines installed
  • Denmark’s largest offshore wind farm

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Borkum Riffgrund 2

Fred. Olsen Windcarrier finished installing 56 V164-8.0MW turbines on Borkum Riffgrund 2 in the German North Sea on 31 August 2018. The project was completed ahead of schedule. The offshore wind park will supply enough energy for 460.000 German households with a total power output of 450MW.

  • 8MW is the largest turbine installed in the German North Sea
  • Bold Tern installed four turbines per cycle
  • Project completed ahead of schedule

The scope of work for Fred. Olsen Windcarrier was the transportation and installation of 56 V164-8.0MW turbines – 36 of them to be installed on monopile foundations and 20 on 50m high jackets with 10m high suction buckets.


Fred. Olsen Windcarrier joined the Galloper installation project midway to support timely completion for client Siemens Gamesa Renewable Energy (SGRE). The scope of work included delivering a fully mobilised vessel, with marine crew for transport and installation.

  • Bold Tern went on hire within 6 to 8 weeks after initial contact
  • Fred. Olsen Windcarrier significantly reduced the time and cost for mobilisation
  • Jetting systems allowed complete jacking operations in just seven hours

“Soil conditions were particularly challenging on this site, and were handled with excellence by our experienced vessel crew. Our jacking equipment proved up to the challenge and efficiently tackled these conditions,” Fred. Olsen Windcarrier’s project manager Sten Rundstrøm said.

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Block Island

Fred. Olsen Windcarrier successfully completed the installation of the US’s first offshore wind farm on 19th August 2016. There were a number of firsts for this project:

  • First offshore wind farm installed in US
  • First Transatlantic voyage for one of our vessels
  • First time our vessels have worked with feeder barges

The scope of work for Fred. Olsen Windcarrier was the transportation of five GE nacelles across the Atlantic and then installation of the full turbines at Block Island. US flagged feeder barges assisted by transporting the towers and blades from shore. The scope also included marine engineering, lift engineering, general operations planning, the design, fabrication and mobilisation of grillage and seafastening and lift supervision.


Fred. Olsen Windcarrier installed 80 Siemens 3.6MW wind turbines at the Butendiek wind farm between September 2014 and June 2015.

  • Implementing lessons learned from the earlier Riffgat project was identified as a key deliverable in ensuring that the project was a success.
  • Butendiek wind farm is one of the few offshore wind projects to have been constructed and commissioned on time and on budget.
  • There were no major personnel incidents during the project and Bold Tern further improved her LTI-free period and HSE record in general

Fred. Olsen Windcarrier was contracted to deliver a fully mobilised installation vessel with marine crew and crane driver, and to perform all required planning, engineering and coordination related to the operation of the installation vessel.

Global Tech I

In 2014, Fred. Olsen Windcarrier installed 75 towers and nacelles and 22 rotor stars of the 80 5MW AREVA turbines at the Global Tech I site within eight months.

  • This was the first project where Brave Tern and Bold Tern worked together.
  • Complete load out of 4 towers and nacelles in just over 24 hours.
  • New record: eight towers and nacelles installed in one week – including 10 hour transfers.

By the end of the project, Brave Tern had installed a total of 51 towers and nacelles and 10 rotor stars and Bold Tern had installed 24 towers and nacelles and 12 rotor stars.

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Alstom Haliade™ Demonstrator

In 2013, Fred. Olsen Windcarrier’s Bold Tern installed the Alstom Haliade™ 6MW demonstrator turbine at the Belwind site. At the time it was the world’s largest offshore wind turbine ever to be installed in sea waters.

  • The Bold Tern was the first vessel to install an offshore turbine of this scale.
  • This was the sixth project for the Fred. Olsen Windcarrier jack-up vessels in their inaugural year.
  • The large deck space and robust and versatile crane were perfect for the Haliade’s™ exceptional dimensions.

Fred. Olsen Windcarrier’s scope of work was to deliver the fully mobilised Bold Tern along with engineering services, lift supervision and WTG technicians supplied by Fred. Olsen related company Global Wind Service.

Bard Offshore I

In 2013, Fred. Olsen Windcarrier’s Brave Tern installed the final 14 complete BARD 5MW wind turbines and an additional 2 rotor stars on the Bard Offshore 1 wind farm in the German North Sea.

  • This was the first project for Fred. Olsen Windcarrier that involved 5MW turbines.
  • This was the first time Fred. Olsen Windcarrier had handled and installed direct drive machines.
  • This was the first time for either of the jack-up vessels to use the rotor star deck layout.
  • This was the first project for Fred. Olsen Windcarrier to provide a jack-up vessel alongside a Bayard CTV.

The full scope of work supplied by Fred. Olsen Windcarrier and related companies included transport and installation of WTGs, marine engineering, and crew transfer vessels.

Borkum Riffgat

In 2013, Fred. Olsen Windcarrier installed 30 complete turbines at the Borkum Riffgat site in the German North Sea.

  • Bold Tern was the first vessel in the world to deliver and install eight Siemens SWT 3.6 120 turbines at a wind farm site in a single deployment.
  • The fastest complete wind turbine was installed in 10 hours.
  • The fastest turnaround time was in 16 hours.

Fred. Olsen Windcarrier also provided two of their specialist Bayard class service vessels within the scope of the contract, as well as technical manpower provided by Fred. Olsen related company Global Wind Service.