What does the "VNAV PATH" display indicate on a navigation screen?

The "VNAV PATH" display is essential for understanding the vertical guidance of an aircraft during its flight, particularly during approaches and climbs. It illustrates the expected vertical profile that an aircraft should follow to achieve its altitude targets safely and efficiently. This is crucial for ensuring that the flight adheres to the correct descent or ascent rates as specified in the flight plan or approach procedures.

By using the VNAV PATH, pilots can effectively manage their altitude changes in relation to the desired glide slopes and any associated waypoints throughout the flight. This allows for a smoother and more controlled flight, minimizing the risk of altitude deviations and ensuring compliance with airspace regulations.

Other display options do not reflect this function accurately. The lateral path, for example, relates more to the horizontal navigation of the aircraft rather than its vertical profile. Speed details and weather updates play important roles during a flight but do not pertain directly to vertical navigation guidance, making them irrelevant in the context of what the VNAV PATH display conveys.