FAA Aircraft Dispatcher Practice Exam

How does a VOR work?

1. By providing GPS coordinates for navigation

2. Through visual references on the ground

3. By emitting radio signals to determine aircraft position

4. By using satellite communication for accurate location

The correct answer is: By emitting radio signals to determine aircraft position

A VOR, or VHF Omnidirectional Range, operates by emitting radio signals that are received by aircraft equipped with VOR receivers. The system allows pilots to determine their position and course relative to the VOR station. Each VOR station transmits a radio signal that includes two components: a reference signal that spreads out in all directions and a rotating directional signal that varies its phase based on the angle from the station. When an aircraft receives these signals, it can compute its bearing from the VOR station. By using a VOR chart, pilots can translate this bearing into a specific route or navigate directly to or from the VOR. This method is essential for en route navigation and plays a crucial role in ensuring safe and accurate flight paths. The other possibilities provided do not accurately describe how a VOR functions. For instance, VOR does not utilize GPS coordinates, visual references, or satellite communication; it solely relies on the principles of radio signal transmission.