European GNSS Contingency/Reversion Handbook for PBN Operations

This document addresses the topic of global navigation surveillance system (GNSS) reversion and contingency in the context of performance-based navigation (PBN) operations in all flight phases.

The main emphasis of this document, however, is placed on terminal and extended terminal operations in a surveillance environment. Operations in a non‐ATS surveillance environment are also covered. For completeness, ground-based augmentation system (GBAS) operations are also included in the scenarios in chapter four, as this is also a GNSS‐based system used on final approach.

This document is not intended to be a definitive guide to contingency operations for PBN. Rather, it provides planning considerations through explanatory text and the use  of sample contingency scenarios. This is provided as a ‘starter pack’ for air navigation service providers (ANSPs) and regulators to assist in their deliberations  when planning contingency operations for GNSS reversion. In context, the expression ANSPs is used to cover regulated parties of the PBN and PCP IRs i.e. air traffic management/air navigation services and  operators of aerodromes.

It serves as a bridge document between existing EUROCONTROL guidance material already published to support airspace planners and infrastructure planners implementing PBN. This document is deliberately not detailed: it seeks rather to enhance understanding on the shared challenge of providing for GNSS contingency/reversion.  

The document is available for download below.

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European GNSS Contingency/Reversion Handbook for PBN Operations