How do modern warships preserve essential systems after a serious hit?
Short answerThey use multiple power routes and separate machinery and fuel supplies so one failure or hit is less likely to disable everything.
NotesWarships carry more backups because damage is an expected part of their role, contributing to their complexity and cost. Electrical ring mains can provide more than one route for power, while diesel generators and gas turbines can be separated around the ship. Drawing fuel from different tanks reduces the risk that one contaminated supply affects every generator. The Queen Elizabeth-class example challenges the assumption that one engine-room hit must disable the ship, because machinery is distributed between several locations. These arrangements improve survivability without making the ship invulnerable.