Saipem, the Italian oil and gas contractor, has unveiled a novel floating offshore wind substructure that will go into the water for testing off Ireland's west coast from 2022. The so-called Hexafloat substructure aims to be a one-size-fits-all foundation for a range of turbine sizes thanks to a hanging counterweight that can be lowered to stabilize heavier loads. The counterweight, essentially a steel basket filled with several thousand tons of magnetite, will be suspended by synthetic fiber tendons from a 180-foot-wide, 1,300-ton hexagonal submersible floater made of welded steel tubes containing water ballast tanks.