 The main armament of the two Italian "Pisa"-class ships consisted of four Cannone da 254/45 V Modello 1906 guns in hydraulically powered, twin-gun turrets fore and aft of the superstructure.The gun fired armor-piercing (AP) projectiles at a muzzle velocity of .The Royal Hellenic Navy preferred smaller 234 mm (9.2 in) guns purchased from Britain for "Georgios Averof", but the ship was otherwise armed nearly identically to her half-sisters.