Tetrahedral modular steel spar (TetraSpar/TetraSub) carrying a 3.6 MW Siemens Gamesa turbine; keel deployed ~50 m below the floater; towed from Grenaa (Denmark) and installed at the METCentre test site off Karmøy, Norway.
The TetraSpar Demonstrator consortium (TEPCO Renewable Power, RWE and Stiesdal Offshore) appointed Global Maritime, with Semco Maritime as onshore subcontractor, to deliver full offshore and onshore decommissioning of the TetraSpar floating wind demonstrator off Karmøy, including project management, engineering, procurement, disconnection and recovery of subsea systems, towing, and dismantling of the turbine, keel and floater.