What is the frequency spacing used in the EU for aviation communications?

In the European Union, the frequency spacing used for aviation communications is 8.33 KHz. This frequency separation allows for more efficient use of the available radio spectrum, accommodating an increasing number of aircraft and the growing demand for airspace communication. The introduction of 8.33 KHz spacing allows for more channels within the same frequency band, helping to mitigate congestion on busy air traffic routes.

In contrast, some other regions may still use wider frequency spacings, such as 25 KHz, which can limit the number of available channels. The 12 KHz spacing, while somewhat common historically, is not as widely implemented as the 8.33 KHz standard in European airspace. This emphasis on 8.33 KHz spacing is part of ongoing efforts to enhance safety and efficiency in aviation communications within the EU.