 The Nagato @-@ class ships were fitted with a 10 @-@ meter ( 32 ft 10 in ) rangefinder in the forward superstructure ; six @-@ meter ( 19 ft 8 in ) and three @-@ meter ( 9 ft 10 in ) anti @-@ aircraft rangefinders were added in the early 1920s . The rangefinders in the two superfiring turrets were replaced by 10 @-@ meter units in 1932 – 33 . 
