Which naval tradition supplies the episode's frigate, destroyer, and cruiser labels?
Short answerNone by itself; the definition is reconstructed from the historical cruising role and translated into modern missions.
NotesThe definition does not import one navy's frigate-destroyer-cruiser ladder. It begins with the historical work of cruising and follows how that work changed with technology and fleet organization. The modern test therefore emphasizes endurance, presence, independent action, and task-group utility. This method lets ships with different national labels be compared by what they are expected to do.