The lateen sail is a triangular sail that is set on a long yard mounted at an angle on the mast. This design allows the sail to catch wind from various directions, making it highly effective for sailing against the wind. The lateen sail was widely used in the Mediterranean Sea and became a key feature in the development of maritime trade. Originating in the Middle Ages, the lateen sail was adopted by various cultures, including the Arabs and Europeans. Its versatility contributed to advancements in navigation and ship design, enabling longer voyages and more efficient travel across open waters.