 When completed in 1915 , the ships had two 3 @.@ 5 @-@ meter ( 11 ft 6 in ) and two 1 @.@ 5 @-@ meter ( 4 ft 11 in ) rangefinders in the forward superstructure , a 4 @.@ 5 @-@ meter ( 14 ft 9 in ) rangefinder on the roof of Turret No. 2 , and 4 @.@ 5 @-@ meter rangefinders in Turrets 3 , 4 , and 5 . In late 1917 a fire @-@ control director was installed on a platform on the foremast . The 4 @.@ 5 @-@ meter rangefinders were replaced by 8 @-@ meter ( 26 ft 3 in ) instruments in 1923 . During Fusō 's first modernization , four directors for the 12 @.@ 7 cm AA guns were added , one on each side of the fore and aft superstructures , and an eight @-@ meter rangefinder was installed at the top of the pagoda mast . This was replaced by a 10 @-@ meter ( 32 ft 10 in ) rangefinder during 1938 . At the same time , the two 3 @.@ 5 @-@ meter rangefinders on the forward superstructure were replaced by directors for the 25 mm AA guns . Additional 25 mm directors were installed on platforms on each side of the funnel . 
