metaphor in The Republic by Plato, likening governance of a state to the command of a ship From Wikiquote, the free quote compendium
The Ship of State is an ancient and oft-cited metaphor, famously expounded by Plato in the Republic (Book 6, 488a–489d), which likens the governance of a city-state to the command of a vessel.
Seamless Wikipedia browsing. On steroids.