For the NAMI shipyard in Ridderkerk we manufactured sea fastenings of composite profiles by automatic welding. In these constructions we processed 250 tons of steel. With the sea fastenings two 1.100 ton jackets will be put down on the pontoons. These pontoons will bring the steel structures to the sea. It concerns the D18a and Q13a jackets for two new platforms of GDF SUEZ E & P Netherlands.