Towards the end of 1944, the design and production planning for the Type XXVI, which used the Walter engine [de], was completed.
For this purpose, the IBG designers produced construction drawings in the partial sheet system, from which the sequence of production and assembly could be seen.
This method was used for the first time in German shipbuilding in the construction of the Type XXVI.
The IBG was one of the central design offices of the Hauptausschuß Schiffbau (HAS) and had two branches in the Harz highlands.
In the offices in Blankenburg and Halberstadt there were an average of 650 employees from summer 1943 to March 1945.