The FL-350 is a flight level that indicates an altitude of 35,000 feet above sea level. It is commonly used in aviation to ensure safe separation between aircraft in the sky. Pilots and air traffic controllers refer to flight levels in thousands of feet, which helps standardize communication and navigation. At FL-350, commercial airliners typically operate to optimize fuel efficiency and avoid turbulence. This altitude is often above weather disturbances, allowing for smoother flights. The use of flight levels like FL-350 is essential for maintaining safety in the busy airspace managed by organizations such as the Federal Aviation Administration (FAA).