A2SEA unterzeichnet Vertrag für Hornsea Offshore Windpark Projekt One (WK-intern) - A2SEA signs contract for Hornsea Offshore Wind Farm Project One From spring 2019, A2SEA will play a key role in building the world’s largest ever offshore wind farm, Hornsea Project One for DONG Energy. Capacity will be 1.2GW. A2SEA’s purpose-built offshore installation vessel SEA INSTALLER will be deployed to install a part of the 174 Siemens 7MW turbines. ”It is a great pleasure and with pride that we can inform that A2SEA has signed a contract to install turbines at what will become the world’s largest offshore wind farm, Hornsea Project One. In