A "casco" is a Spanish term that translates to "hull" in English, referring to the main body of a ship or boat. It is the structure that provides buoyancy and stability, allowing the vessel to float on water. The casco is designed to withstand various marine conditions and is often made from materials like steel, fiberglass, or wood. In addition to its primary function, the casco also houses essential components of the vessel, such as the engine and storage areas. Proper maintenance of the casco is crucial for the safety and performance of the ship, making it a vital aspect of maritime engineering and design.