To what degree are runway numbers rounded off?

Runway numbers are always rounded to the nearest 10 degrees. This system is in place to provide a clear and concise identification of runways, which is crucial for navigation and safety. The number assigned to a runway reflects the magnetic azimuth in which the runway is oriented, rounded to the nearest 10 degrees, thereby simplifying communications between pilots and air traffic control. For example, if a runway has an orientation of 253 degrees, it would be designated as runway 25.

This rounding to the nearest 10 degrees helps avoid confusion that could arise from more granular measurements and ensures consistent identification across various locations, enhancing the overall safety in airport operations. Understanding this rounding principle is essential for fire fighting teams as they must be familiar with runway designations for effective incident response while on the airfield.