The part-scale prototype of floating wind pioneer Saitec’s next-generation design has sunk off the coast of Spain as superstorm Epsilon made landfall, days after the so-called BlueSATH unit completing sea trials.

A 30kW version of the company’s SATH (swinging around twin hull) concept, a two-pontoon concrete platform anchored to the seabed with a single-point mooring that allows it to "weathervane" in the wind and waves, the unit had been on a test site off Cantabria when the storm blew in late last week.