 In early 1942 the rearmost 20-millimeter mounts were replaced by twin 37-millimeter gun mounts and the 20-millimeter guns were moved to the roof of Turret 'B', while the RPC motors from the stabilized mounts of the 90 mm guns were removed.The forward superstructure was rebuilt with a new forward conning tower, protected with thick armor.Atop the conning tower there was a fire-control director fitted with three large rangefinders.