Zone of confusion is the volume of space above the VOR station where what occurs?

• A. A lack of adequate navigation signal directly above the VOR station causes the needle to deviate
• B. The air becomes turbulent
• C. The altitude is below safe minimums
• D. The signal is too strong causing antenna damage

Answer: (A)

The cone of confusion is the volume directly above a VOR station where the VOR bearing information becomes unreliable. When you’re overhead, the angular relationship to the station provides little to no definite directional reference, so the VOR receiver cannot establish a single, accurate radial. As a result, the CDI needle can deflect unpredictably or show erratic readings. This isn’t about turbulence, minimum safe altitude, or signal strength; it’s a geometry limitation of how VOR signals are referenced when you’re right above the station. To navigate reliably, move away from the station or use another navigation aid to reestablish a stable bearing.