Modern armor means citadels, subdivision, and expendable outer volume

The design does not rely on a single belt defeating every modern warhead. It places command and other vital functions in an armored inner core that could also serve as a last protected refuge for the crew. One deliberately unresolved escape concept would let that crew core detach as a lifeboat if the rest of the ship were sinking, although its release mechanism would still have to be invented. Spaced outer armor could trigger a missile warhead before it reaches the inner layer, while sacrificial compartments absorb fragments and blast. False or secondary keels, multiple hull layers, and extensive subdivision address underwater attack and keep one penetration from opening every structural path. The damaged outer volume could be abandoned during the action and repaired later if the protected core and propulsion network remained viable. The operational aim is to force an enemy to achieve several hits through a large defensive missile battery rather than treating one impact as a mission kill. Survivability therefore combines interception, armor, subdivision, and redundancy instead of assigning the entire problem to any single layer.