Sea jack with wind turbine
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Wind farms: Getting a giant turbine ready to set sail

This week, BBC News is taking an in-depth look at offshore wind turbines, and the challenges, costs and construction of these sea giants.

Here, science correspondent David Shukman heads to Harland and Wolff's dockyard in Belfast, Northern Ireland, and takes a look at how a wind turbine is prepared for its journey out to sea.