Statoil has shared a timelapse video of one of 67 foundations for the 402MW Dudgeon offshore wind farm being installed in the UK part of the North Sea.
The wind farm is located some 32 kilometres north of Cromer, off the coast of Norfolk.
The crane vessel Oleg Strashnov has been installing foundations for the wind farm since early April.
Dudgeon comprises 67 Siemens 6MW turbines, and is expected to be commissioned by early 2017.
Statoil is the developer and future operator of the wind farm. The Norwegian energy company co-owns the wind farm alongside Statkraft and Masdar.
The total investment in the project, which was officially approved in 2014, is estimated at GBP 1.5 billion.
Dudgeon is being developed near the 317MW Sheringham Shoal wind farm, also developed by Statoil and Statkraft, which has been operational since 2012.