 The triple bottom underneath the armored citadel was believed to protect the ship against a charge equivalent to of TNT below the ship's hull.Rather than use the Tsarist-era MK-3-12 gun as originally planned, or use the 305-mm/54 guns ordered for the "Kronstadt"s, it was decided in 1947 to adopt a new and more powerful 61-caliber gun of the same size that was to use three newly designed triple SM-6 turrets.Each individual gun weighed and the complete turret weighed .