What is the main goal of VNAV during an approach?

The primary objective of VNAV during an approach is to optimize descent profiles while ensuring that safe altitude limits are maintained. VNAV systems are designed to provide precise vertical guidance that assists pilots in managing their descent path effectively, accommodating various restrictions imposed by air traffic control and terrain considerations. This allows for a smoother and more efficient approach to landing, while also ensuring the aircraft remains at safe altitudes throughout the descent.

By utilizing VNAV, pilots can adhere to programmed altitudes and vertical speed changes, which is crucial in managing both safety and efficiency during the landing sequence. Effective vertical navigation helps in minimizing the need for manual adjustments and potential miscalculations, thus enhancing the overall safety of the approach.

In contrast, maximizing the climb rate does not align with the purpose of VNAV during an approach, and avoiding communication with air traffic control can lead to safety risks. Expediting the landing procedure without regard to altitude can compromise safety and is not a standard practice in aviation.