When flying outbound from a VOR station on the 120 degree radial and inbound on the 300 radial with the course selector set to 120 degrees, what TO/FROM indication will be shown when changing frequencies?

When flying outbound from a VOR station on the 120-degree radial, the aircraft is located on the path extending from the VOR in the direction of 120 degrees. When set to a 120-degree course, the indicator will show a TO indication if you're on the radial heading directly toward the station.

However, when transitioning to the 300-degree radial inbound, the aircraft is approaching the VOR station from the direction of 300 degrees. The course selector remains set to 120 degrees, but as the aircraft changes its frequency to the VOR station, the relationship of the aircraft's position in respect to the receiver changes.

The TO/FROM indicator will show a TO indication when your track is towards the station at a bearing of 120 degrees, which reflects the outbound trajectory away from the VOR. The aircraft changing to the frequency of the VOR while on the inbound 300-degree radial will also lead the instrument to display TO as the primary indication, which is correct when in flight towards the VOR.

Thus, it is crucial to realize that despite being outbound at one point, the indication can still signal TO when in an orientation seeking to establish a radial course toward the VOR with the frequency changed.