Information regarding RNAV (GNSS) Approach Operations for Air Navigation Service Providers, Aerodrome Licence Holders, and Aircraft Operators
Approach Applications which are classified as RNP Approach (APCH) in accordance with ICAO Doc 9613 Performance Based Navigation (PBN) Manual (and ICAO state Letter SP 65/4-10/53) give access to minima (on an Instrument Approach Procedure) designated as:
The instrument approach procedures associated with RNP APCH are entitled RNAV (GNSS) to reflect that GNSS is the primary navigation system. With the inherent onboard performance monitoring and alerting provided by GNSS, the navigation specification qualifies as RNP, however these procedures pre-date PBN, so the chart name has remained as RNAV.
Approach Procedure with Vertical Guidance
The use of GNSS facilitates the use of Approach Procedure with Vertical Guidance (APV).
APV is defined in ICAO Doc 8168 as:
An instrument procedure which utilizes lateral and vertical guidance but does not meet the requirements established for precision approach and landing operations.
Satellite Based Augmentation System
Within Europe the Satellite Based Augmentation System (SBAS) is provided by the European Geostationary Navigation Overlay Service (EGNOS).
Other SBAS services provided in other regions of the world include:
RNP Authorisation Required (AR) APCH
RNP AR APCH is a “high-end” instrument approach navigation specification. RNP AR provides an added level of assurance over standard operations and as the designation indicates, a special Authorisation is Required.