What is the maximum range of a VOR at an altitude of 15,000 feet?

The maximum range of a VOR (VHF Omnidirectional Range) signal can vary based on several factors, including the altitude of the aircraft and the specific characteristics of the VOR station. Generally, the effective service volume of a VOR is determined by the altitude of the aircraft; higher altitudes can receive signals from VOR stations that are further away.

At an altitude of 15,000 feet, the typical maximum range that a VOR can be received is around 120 nautical miles. This is due to the curvature of the Earth and the line-of-sight nature of VOR transmissions. As altitude increases, the horizon extends, allowing the aircraft to receive signals from stations that are located at greater distances.

Understanding this range is crucial for pilots when navigating and ensuring they stay within the coverage area of the VOR stations they are using for guidance. It's important to note that while altitude plays a significant role in VOR range, other factors such as terrain and signal strength can also affect reception.