 The main armament of the Vettor Pisani @-@ class ships consisted of twelve quick @-@ firing ( QF ) Cannone da 152 / 40 A Modello 1891 guns in single mounts . All of these guns were mounted on the broadside , eight on the upper deck and four at the corners of the central citadel in armored casemates . Single QF Cannone da 120 / 40 A Modello 1891 guns were mounted in the bow and stern and the remaining two 120 mm ( 4 @.@ 7 in ) guns were positioned on the main deck between the 152 mm ( 6 @.@ 0 in ) guns . For defense against torpedo boats , the ship carried fourteen QF 57 mm ( 2 @.@ 2 in ) Hotchkiss guns and eight QF 37 mm ( 1 @.@ 5 in ) Hotchkiss guns . The ship was also equipped with four 450 mm ( 17 @.@ 7 in ) torpedo tubes . 
