To build battleships to compete with the German H-class vessels, the French Navy would need to embark on a major program to improve its infrastructure. The Laninon Docks at the Arsenal de Brest were to be significantly expanded; a new, longer dock (that would be designated Dock No. 10) that was long and wide was to be excavated, which would have been large enough to construct the "Alsace" class. A new long graving dock was to be built, and the existing Dock No. 9 was to be lengthened from 250 m to . Dock No. 10 was slated to be completed by 1942, at which point work on the graving dock would begin, as budgetary limitations and a shortage of skilled workers prevented both facilities from being built at the same time. At a later date, Dock No. 10 was to be lengthened to 360 m as well.