sentences:  In 1928 the Seebeckwerft became a member of the Deschimag, a cooperation of several German shipyards under the leadership of the Bremen-shipyard A.G. Weser.After WW II the Deschimag was dissolved and Seebeckwerft became subsidiary of A.G. Weser, now named A.G. Weser Seebeckwerft.During World War II Seebeckwerft built 16 Type IX U-boats for the Kriegsmarine.