What can be inferred about station passage for VOR and TACAN?

Station passage is a critical concept in navigating using VOR (VHF Omnidirectional Range) and TACAN (Tactical Air Navigation) systems. This concept revolves around how pilots determine when they have effectively passed over the navigation station.

When using a VOR system, station passage is indeed marked by the TO-FROM indicator changing from TO to FROM. This switch indicates that the aircraft has just crossed directly over the station, making this indicator a reliable guide for pilots as they navigate.

As for the TACAN system, which provides both azimuth and distance information to the pilot, the determination of station passage occurs when the range indicator starts to increase. This increase signifies that the aircraft is moving away from the station, having just passed over it.

Choosing the correct option reflects an understanding of these navigation systems. The assertion that both the condition of the TO-FROM indicator for VOR and the changes in the range indicators for TACAN inform pilots when they have passed the station highlights the similarities and specificities in how these navigation aids function. Thus, both statements accurately encapsulate the principles of station passage for VOR and TACAN.