Final answer:
A station passage for a VOR, TACAN, and an ADF involves an aircraft passing directly over the respective navigation station.
Step-by-step explanation:
In aviation, a VOR is a very high frequency (VHF) omnidirectional range navigation system that provides aircraft with a radial to navigate and determine their position in relation to a ground-based station. When an aircraft passes directly over a VOR station, it is said to have a station passage.
A TACAN is a Tactical Air Navigation system that provides navigation information as well as distance and bearing to the station. Similar to a VOR, a TACAN station passage occurs when an aircraft crosses directly over the TACAN station.
An ADF, or Automatic Direction Finder, is a radio navigation instrument that receives signals from non-directional beacons (NDBs). An ADF station passage occurs when an aircraft flies directly over an NDB station.