MonkeyClicker writes "Development of offshore wind farms has been restricted to places where turbines can be attached to the sea bed.
But earlier this week, Siemens and energy company StatoilHydro installed what they call the first large-scale floating turbine. The installation is off the coast of Norway, and testing is expected to last for two years.
The Hywind turbine will still have a ballast that is tied to the sea floor with cables. Wires will transfer the electricity produced to the mainland grid starting in July."
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