What is a potential consequence of neglecting VNAV altitude alerts?

Neglecting VNAV altitude alerts can indeed lead to a serious risk of altitude deviation, which may ultimately result in a controlled flight into terrain (CFIT) situation. VNAV altitude alerts are designed to inform pilots when the aircraft is approaching a designated altitude or when it deviates from its planned altitude profile. If these alerts are ignored, the pilot may not make necessary adjustments in altitude, potentially leading to the aircraft flying lower than intended or not reaching the required cruising or approach altitude.

Controlled flight into terrain occurs when an aircraft, under the control of the pilot, inadvertently flies into the ground or an obstacle. This is especially dangerous during phases of flight such as approach and landing, where terrain awareness is crucial. By adhering to VNAV altitude alerts, pilots ensure that they maintain proper altitude awareness, reducing the risk of CFIT incidents and enhancing overall safety in navigation. Therefore, understanding and responding to VNAV altitude alerts is vital for maintaining safe flight operations.