Runway 18 is a designated landing and takeoff strip at an airport, typically oriented in a specific direction. The number "18" indicates that the runway is aligned approximately 180 degrees on a compass, meaning it runs north-south. This designation helps pilots navigate and communicate effectively during flight operations. Airports often have multiple runways, each numbered according to its magnetic heading. For instance, a runway labeled as Runway 36 would be oriented in the opposite direction of Runway 18. Understanding runway designations is crucial for safe air traffic management and efficient airport operations.