Which of the following is a function of ETVS?

The function of ETVS, which stands for Enhanced Terminal Voice Switching, is particularly focused on managing voice communication within a terminal environment. This involves coordinating and routing all voice communications necessary for air traffic management and ensuring clear and efficient communication among air traffic controllers and pilots. The system is designed to enhance situational awareness and operational efficiency in busy airport settings by streamlining voice communication processes.

In contrast, the other options pertain to different functionalities. Recording video feeds relates more to surveillance systems, while providing real-time weather updates pertains to meteorological systems designed for flight planning and safety. Controlling aircraft landing systems involves more technical systems that operate the instruments and technology required for safe landings. Thus, managing voice communications is the specific function that aligns with the purpose of ETVS.