Offshore Industrie Service GmbH (OIS), with its headquarter in seaport Rostock, was established 2010 combining the existing offshore competences of the owner-companies Krebs-Group, IMG-Group and SEAR GmbH. OIS is a turn-key service provider for projecting, execution and supervising typical service and maintenance issues at offshore structures. The main service focus is the inspection and maintenance of hydraulic and electrical installations, the repair of corrosion protection systems and repair welding in the steel structure. Rotor-blade inspections and diving works are also available within this package of offer. At present, the latter are proceeded in the offshore wind farm Baltic 1 for checks of the foundations.