 The deck above the steering gear and rudders was 30 millimeters ( 1 @.@ 2 in ) thick . The thickness of the armored deck ranged from 35 – 40 millimeters ( 1 @.@ 4 – 1 @.@ 6 in ) on the flat and 60 millimeters ( 2 @.@ 4 in ) on the slope . The sides of the conning tower were 100 millimeters thick while its roof was 50 millimeters ( 2 @.@ 0 in ) thick . The main gun turrets had 25 millimeters ( 1 @.@ 0 in ) of armor on all sides and on the roof . The barbette armor ranged from 25 to 100 millimeters ( 1 @.@ 0 to 3 @.@ 9 in ) in thickness . The ammunition hoists for the secondary armament were protected by 75 to 100 millimeters ( 3 @.@ 0 to 3 @.@ 9 in ) of armor . The funnel uptakes were provided with 70 to 95 millimeters ( 2 @.@ 8 to 3 @.@ 7 in ) of armor . There was no separate anti @-@ torpedo bulkhead as that function was performed by the lower extension of the belt armor . 
