 During the ships ' modernization during the 1930s , their forward superstructures were enlarged with multiple platforms added to their tripod foremasts . The rear superstructures were rebuilt to accommodate mounts for 127 @-@ millimetre ( 5 @.@ 0 in ) anti @-@ aircraft ( AA ) guns and additional fire @-@ control directors . Both ships were also given torpedo bulges to improve their underwater protection and to compensate for the weight of the additional armor . In addition , their sterns were lengthened by 7 @.@ 62 meters ( 25 @.@ 0 ft ) . These changes increased their overall length to 212 @.@ 75 m ( 698 @.@ 0 ft ) , their beam to 33 @.@ 1 m ( 108 ft 7 in ) and their draft to 9 @.@ 69 meters ( 31 ft 9 in ) . Their displacement increased nearly 4 @,@ 000 long tons ( 4 @,@ 100 t ) to 39 @,@ 154 long tons ( 39 @,@ 782 t ) at deep load . 
