A full-rigged ship is a type of sailing vessel that has three or more masts, all of which are equipped with square sails. This design allows for efficient sailing across various wind conditions, making it suitable for long voyages. The square sails catch the wind effectively, providing the ship with the necessary propulsion. These ships were commonly used during the age of sail, particularly in the 19th century, for trade and exploration. Notable examples include the Cutty Sark and the USS Constitution, which showcase the craftsmanship and engineering of their time. Full-rigged ships played a significant role in maritime history.