Definition of Standard Service Volume (SSV)
The Standard Service Volume (SSV) is a conceptual airspace volume that is defined to determine the limits of coverage for a VHF Omnidirectional Range (VOR) navigational facility. The SSV is established based on the minimum altitude necessary to receive reliable signals from the VOR and can vary for different types of VORs.
The SSV is typically defined as a symmetrical, cone-shaped volume around the antenna of a VOR that extends upward and outward from the airport surface. The coverage area of a VOR’s signals within the SSV is deemed reliable and is used for navigation, whereas outside of the volume, the signals may be harder to receive or not usable for certain types of navigation.
According to the International Civil Aviation Organization (ICAO), the SSV is established based on the intended use of the facility, expected reliability of the signals, and the types of navigation equipment that may require the VOR’s signals. The SSV is also used to determine the appropriate spacing between VORs and to avoid interference with other navigational aids.
In summary, the Standard Service Volume (SSV) is an essential tool for aviation navigation, defining the airspace volume in which a VOR’s signals are reliable and usable.
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