An airline transport pilot (ATP) is a professional pilot who holds the highest level of certification issued by the Federal Aviation Administration (FAA) in the United States. This certification allows pilots to operate large commercial aircraft and is essential for those who wish to work for airlines. To obtain an ATP license, pilots must meet specific requirements, including a minimum number of flight hours and passing written and practical exams. ATP pilots are responsible for ensuring the safety of passengers and crew during flights. They must have a deep understanding of aviation regulations, navigation, and aircraft systems. Additionally, they often work closely with other crew members, including co-pilots and flight attendants, to ensure smooth operations and effective communication throughout the flight.