Ship speed depends more directly on length-to-beam ratio, hull form, and available power than on displacement by itself. American supercarriers demonstrate that a vessel above 100,000 tons can still achieve high speed when its hull and propulsion plant are designed for it. The practical limit may be machinery life rather than the ability to generate another knot. Enterprise is cited as a case in which sustained maximum speed imposed damaging wear on the shafts.
Notable Point · 4:46:37-4:47:37
Why displacement alone does not determine ship speed
The closing engineering point ties speed to hull proportions, form, and installed power while warning that maximum output can consume machinery life.