FL230 refers to a flight level of 23,000 feet above sea level, commonly used in aviation. Flight levels are standardized altitudes that help pilots and air traffic controllers maintain safe vertical separation between aircraft. FL230 is often used for cruising in commercial flights, especially in the context of long-haul travel. In the context of air traffic control, FL230 is part of a system that helps manage the flow of air traffic. Pilots may request to fly at this altitude based on their flight plan, weather conditions, and air traffic. Maintaining proper altitude is crucial for safety and efficiency in the skies.