The DMC50 17 is a type of VHF (Very High Frequency) antenna used on aircraft. It’s designed to send and receive radio signals in the VHF range, typically between 118 MHz and 137 MHz. This is the frequency range used for most air-to-ground communications. In simple terms, it helps pilots stay connected with control towers and other aircraft. https://medium.com/@aircraftparts/dmc50-17-vhf-antenna-specifications-performance-and-applications-in-modern-aviation-4c206831a7bf