What is the standard service volume of a VOR station?

The standard service volume of a VOR (VHF Omnidirectional Range) station is defined based on its classification. Terminal VORs typically provide coverage within a 25 nautical mile radius, which is designed to support operations in the vicinity of airports and within terminal airspace where aircraft may be conducting approach and departure procedures.

For high altitude VORs, the service volume extends up to 100 nautical miles, accommodating the higher altitudes at which aircraft operate in en route airspace. This range allows for adequate navigation capability for aircraft traveling at cruising altitudes, ensuring that pilots can rely on the VOR signal as they traverse longer distances.

The chosen answer reflects the correct specifications for VOR service volumes as established in FAA regulations and guidance, which outline these distances based on the type of VOR station and its intended operational environment. This information is critical for pilots in conducting navigation and ensuring they maintain adequate signal reception during flight operations.