What is indicated by the To-From indicator of a VOR during initial station passage?

The correct answer is that the To-From indicator of a VOR makes the first positive change to "From" during initial station passage. When an aircraft is flying towards a VOR station and it passes directly over the station, the To-From indicator will show a transition from "To" to "From." This change signals to the pilot that they have successfully passed the station.

Understanding the functioning of VOR indicators is essential for effective navigation. As the aircraft approaches the VOR station from the "To" side and crosses over, the indicator reflects this change of relation to the station. The transition to "From" is crucial for determining the next course of action, particularly if a pilot needs to navigate using the VOR for outbound leg planning.

In the context of the other choices, "remain in the 'To' position" does not describe the action occurring at the moment of passage, while "shows a steady state in either position" fails to capture the dynamic nature of navigation indicators during such critical moments. The option of experiencing a "momentary flicker" is also not accurate, as the change is usually a definitive switch rather than a fleeting indicator.