With the development of technology, people have created both land- and water-based vehicles. A flying machine, such as an aeroplane, airship or helicopter, is referred to as an aircraft and has a major impact on people's lives. Who would have guessed that humans will one day be able to fly like birds? It seems like a beautiful sight to see how science can use technical innovations like aircraft to fly through the air. While aeronautics is the study of aviation, such as aircraft manufacturing, aviation refers to human activities involving aircraft. Every aircraft requires the presence of a pilot or aviator who is in command of the aircraft's movement while in flight and during operations. There are several duties that all pilots must perform, even though they vary based on the type of pilot.