A hydroplane is a type of watercraft designed to glide over the surface of water. It typically has a flat bottom and is built to reduce drag, allowing it to travel at high speeds. Hydroplanes are often used in racing, where they can achieve impressive velocities due to their aerodynamic shape and lightweight materials. In aviation, the term "hydroplane" can also refer to a situation where an aircraft loses traction with the runway due to water, causing it to slide uncontrollably. This phenomenon can occur during heavy rain or on wet surfaces, posing risks for pilots and passengers.