What is the VOR service volume for high altitude use from 14,500 to 60,000 feet?

The VOR (VHF Omnidirectional Range) service volume determines the effective range and altitude at which navigational signals are usable. For high altitude VOR usage, the service volume extends significantly compared to lower altitudes. When considering high altitude VOR service volumes from 14,500 feet up to 60,000 feet, it is established that the usable range extends to 130 nautical miles from the VOR station. This range allows for effective navigation and signal reception by aircraft flying at those altitudes, facilitating safe and accurate route navigation in the IFR environment.

In contrast, VOR service volumes at lower altitudes, like those under 14,500 feet, are 40 nautical miles or 100 nautical miles, which reflects the different requirements and operational needs for aircraft operating at varying altitudes. Understanding these service volumes is crucial for pilots in ensuring they remain within the coverage area of the VOR signals when navigating.