 As with the South Carolina class , these ships were fitted with two 3 @-@ inch / 50 caliber anti @-@ aircraft ( AA ) guns in Mark 11 mounts in 1917 . The Mark 11 mount was the first 3 @-@ inch AA mounting issued by the US Navy . They had a trunnion height of 66 @.@ 25 in ( 168 cm ) compared to a height of 45 in ( 114 cm ) for the pedestal mountings used against surface craft . This allowed them an elevation range between − 10 and 85 degrees . Maximum range was 14 @,@ 600 yd ( 13 @,@ 350 m ) at 43 degrees and maximum ceiling 30 @,@ 400 ft ( 9 @,@ 266 m ) at 85 degrees . 
