With the H43 design, the Naval construction office finally left the path of battleship that had had chance to build at all. Being a enlarged version of the H42, the new design had no counterpart in other contries. Having a size ov over 111000 tons and a length of 330 meters, the ship was more than twice the size than other existing battleship of that time. Equipped with 50,8 cm guns, the main artillery was also enlarged to the previous design, while the secondary and flak armament was similar.

The projected top speed of 31 knots required a mixed propulsion system as the one of the previous designs, two props powered my diesel engines and two powered by steam turbines. The main armor was not increased in size, but it covered a larger area of the ship.