The Anglo-German Naval Agreement allowed a maximum calibre of 16in, and Hitler soon had second thoughts, ordering the ships to be equipped with 380mm (15in) guns; but as the 280mm triple turret was readily available and the development of a new 15in turret would take some years, he agreed that the two vessels should have 11in weapons initially because he urgently needed capital ships for his political ideals. The ships would be upgunned at the earliest possible opportunity. The 380mm twin turret was later to be used for the Bismarck class - which was therefore tied to this mounting as other navies were settling on 16in as the ideal battleship calibre.