Lateen sails are triangular sails that are mounted on a long yard, which is attached to the mast at an angle. This design allows the sail to catch the wind effectively, making it ideal for sailing against the wind. Lateen sails were commonly used in the Mediterranean Sea and became popular during the Middle Ages, especially among Arab and European sailors. The lateen sail's shape and rigging enable better maneuverability and speed compared to traditional square sails. This innovation played a significant role in maritime trade and exploration, influencing the design of later sailing vessels, including caravels and galleons.