What is the purpose of VNAV configuration?

The purpose of VNAV configuration is to optimize flight paths for approaches, departures, and level-offs. This system facilitates precise vertical navigation by calculating and guiding the aircraft along a defined vertical profile, which helps to ensure that the aircraft maintains the correct altitude and descent rate during different phases of flight. By doing so, VNAV assists in achieving efficient fuel usage, maintaining safety, and adhering to air traffic control procedures.

The focus on optimizing flight paths allows pilots to follow established performance charts and procedures, which ultimately contributes to smoother operations and improved overall efficiency during the flight, especially in busy airspace or complex approach scenarios.