What effect does overriding sensitivity during a GPS approach have?

Overriding sensitivity during a GPS approach is a critical consideration for maintaining the correct modes of operation within the aircraft's avionics systems. When sensitivity is overridden, it effectively cancels the approach mode annunciation. This occurs because the system is designed to provide specific guidance based on the sensitivity settings that dictate how the aircraft should respond to deviations from the intended flight path.

By canceling the approach mode annunciation, the pilot may no longer receive visual or aural cues that indicate that the aircraft is in approach mode, which can lead to confusion regarding the current status of the approach. This can impact the pilot's ability to accurately monitor and manage the approach, putting them at risk of flying an incorrect flight path or mismanaging the aircraft’s descent profile.

In contrast, overriding sensitivity does not inherently prolong the approach time, change the flight path to a closer vector, or increase navigational accuracy. Those outcomes would depend on other factors such as pilot actions and prevailing conditions, rather than merely the act of overriding the sensitivity settings. Thus, canceling the approach mode annunciation is the key consequence of overriding sensitivity during a GPS approach.