👉 A fireboard is a type of sail that is used for sailing in water. It consists of a single piece of wood or metal, which has been heated to form a wax-like substance on its surface. The fireboard is then placed on top of the hull of the boat and is supported by a floating platform called a keel. The fireboard is typically made from a variety of materials such as wood, metal, or composite material, depending on the desired type of sail.