How is the vertical deviation indicator depicted on the PFD?

The vertical deviation indicator on the Primary Flight Display (PFD) is represented by a magenta circle along the altitude scale. This indicator provides crucial information regarding the aircraft's altitude relative to the selected altitude, enabling pilots to manage their ascent or descent more effectively. When the aircraft is above the selected altitude, the magenta circle appears above the scale, and when it is below, it appears below the scale. This intuitive visual representation helps pilots quickly assess their vertical position and make necessary adjustments during flight.

Understanding the function and appearance of various indicators on the PFD is essential for successful aircraft operation, as it allows pilots to maintain awareness of their altitude and to achieve more precise control during climbs and descents.