Most civilian aviation radio communication occurs primarily in which frequency range?

Civilian aviation radio communication predominantly occurs in the Very High Frequency (VHF) range, which is generally from 118 MHz to 137 MHz. This frequency range is specifically chosen for aviation communication because it offers several advantages.

VHF frequencies provide a clear line-of-sight communication, which is essential for aircraft operating at lower altitudes. This clarity is crucial for air traffic control, especially in busy airspace, as it minimizes interference and allows pilots to receive critical information without distortion. Additionally, the VHF spectrum can accommodate a wide range of channels, enabling multiple communications without overlap.

Moreover, VHF radios are equipped with essential features that align with the operational needs of aviation, such as AM modulation, which is effective in dealing with atmospheric noise and static interference, typical in HF and UHF communications. As a result, VHF is widely utilized for air-to-ground and air-to-air communication, including coordination during take-off and landing procedures, thereby ensuring safety and efficiency in civilian air operations.

In contrast, while UHF frequencies may be used for some aviation applications, particularly military communications, they are not the primary choice for civilian aviation due to factors like decreased range and effectiveness in certain conditions. HF frequencies are primarily used for long-distance communication