What characterizes an APV (Approach with Vertical guidance)?

An Approach with Vertical Guidance (APV) is characterized by the presence of a glide slope, which offers vertical descent information to pilots. However, it does not always meet the stringent standards set by the International Civil Aviation Organization (ICAO) for precision approaches. This means that while pilots can receive vertical guidance through the use of systems such as Baro-VNAV (Barometric Vertical Navigation), the approaches may not meet all the requirements defined for precision operations, particularly regarding the minima and accuracy of the glide path.

For example, an APV may allow for safe vertical descent but might not provide the same level of precision as an ILS (Instrument Landing System) approach, which adheres closely to the ICAO's precision approach standards. Therefore, the presence of a glide slope combined with the failure to meet ICAO standards accurately describes the nature of an APV.