The rear turrets , the barbettes and their supporting structures were removed beginning in early 1943 and the openings in the middle deck were covered by 152 mm plates salvaged from the turret armour . All of the 14 cm guns were removed and the casemate openings sealed off . Four additional twin 12 @.@ 7 cm mounts were added , one pair abreast the funnel and the other abreast the conning tower . The original ten twin 25 mm gun mounts were replaced by triple mounts and nine new triple mounts were added , a total of 57 guns . Two each Type 94 and Type 95 AA directors were added to control the additional guns . The ammunition for these new guns was stored in the magazines originally used for the 14 cm guns and for Turret No. 5 . During 1944 , the ships ' AA defences were reinforced with an additional dozen triple and eleven single 25 mm gun mounts , for a total of 104 barrels , and a pair of Type 13 early warning radars were added . In September six 30 @-@ round AA rocket launchers were added on the sides of the flight deck .