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 navigation. It was commonly used in the Mediterranean Sea and became popular among Arab and European sailors during the Middle Ages. The lateen sail played a significant role in maritime trade and exploration. Its ability to sail against the wind enabled ships to travel more efficiently, contributing to the expansion of trade routes and the exchange of cultures. This innovation laid the groundwork for advancements in nautical technology.