USS South Dakota (BB-49) (1939-40)
1) Both Tripodmasts removed and replaced by modern mast structures.
2) Mk-33 Fire Control Director at the highest platform of the foremast platform with a Mk-31 one level down and flanked on either side by Mk-31 Directors and a 15’ Rangefinder forward with the same arrangement on the aftermast.
3) The 6in/53 cal. Guns were removed and replaced by 10 dual 5in. 38 cal.
4) Four quad 1.1in machine guns two forward and two aft flanking either mast with various Oerlikons in gun tubs.