Technically, a ship is a vessel with three (3) square-rigged masts, though the expression has evolved to include almost all sea-going vessels. See more information: List of Ships. Frigate. Ship of the Line. Rating System of the Royal Navy. Retrieved from "https://potbs.fandom.com/wiki/Ship?oldid=58857" Categories: Game Terminology Nautical Terms Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.