What is the frequency spacing in the European Union for communication channels?

In the European Union, the standard frequency spacing for communication channels, particularly for aviation voice communications, is 8.33 kHz. This spacing allows for greater frequency utilization and increases the number of available channels within the same frequency band, which is crucial for busy airspaces and regions with a high volume of air traffic.

Prior to the adoption of 8.33 kHz spacing, channels were typically spaced at 25 kHz intervals. The shift to 8.33 kHz was implemented to accommodate the growing demand for communication channels as air traffic increased, enabling more efficient use of the available spectrum.

This narrower channel spacing also helps to minimize interference between adjacent channels, thereby improving the clarity and reliability of communications between pilots and air traffic control. The 8.33 kHz standard is particularly significant within the European Union, where it has become a key requirement for all aircraft operating in controlled airspace, ensuring compliance with regulatory standards and enhancing overall safety in aviation operations.