Airfield markings are essential visual aids on runways and taxiways that help pilots navigate safely. These markings include lines, symbols, and numbers that indicate runway boundaries, taxi routes, and holding positions. They are painted in specific colors, primarily white and yellow, to ensure visibility in various weather conditions. The International Civil Aviation Organization (ICAO) sets standards for airfield markings to ensure consistency worldwide. Proper understanding of these markings is crucial for pilots and ground personnel, as they provide important information about the airfield layout, operational procedures, and safety protocols.