How could an electrically driven battleship use main-engine power for flood-control pumps?
Short answerA common electrical ring lets generators feed propulsion or ship services, so available power can be redirected to pumps when speed is less important.
NotesThe ship can run routine loads from one generator, bring more sets online for speed, or route their output to auxiliary systems. That flexibility is valuable during flooding, provided the electrical distribution and pumps themselves survive and are sized to accept the power.