Missiles did not create a wholly new problem for battleships because armor-piercing shells had always threatened armored ships. Protection reduced the chance that one hit would reach a vital space or immediately end the fight. Its value lies in the time and resilience gained after an attack gets through. A modern scheme would combine physical protection with measures that detonate or defeat incoming weapons before they reach critical systems.
Notable Point · 4:48-6:29
Why missiles did not make armor useless
Armor absorbs damage and buys survival time; it was never expected to stop every shell or missile.