What is the significance of the Magnetic Reference for Runway Numbering?

The significance of the magnetic reference for runway numbering lies in the system's method of alignment with the Earth's magnetic field. Runway numbers are assigned based on the runway's magnetic heading, which is determined by the direction the runway points and oriented to the nearest 10 degrees. For instance, a runway aligned approximately to the magnetic heading of 270 degrees will be numbered as Runway 27. This approach ensures that pilots can quickly and accurately identify the direction of the runway in relation to their aircraft's heading, facilitating safe and precise navigation during takeoff and landing.

This system of numbering helps streamline communication and coordination among pilots and air traffic control, thereby enhancing the overall safety and efficiency of air travel. Additionally, the use of magnetic headings rather than geographic headings accounts for the variations in magnetic declination in different regions, ensuring consistency for pilots across various locales.