Guidelines for Implementing a Minimum Operational Network (MON)

The CANSO Guidelines for Implementing a Minimum Operational Network (MON) using Conventional Navigation Aids (NAVAID) for Contingency During Global Navigation Satellite System (GNSS) Outages is a high-level guidance document based on the review of several international MON concepts, which are included in the appendices. Understanding GNSS vulnerabilities and Air Traffic Management (ATM) reversionary scenarios is essential to define a Navigation Minimum Operational Network (NAV MON).

This document details the technical capabilities and limitations of each specific navigation technology, particularly their coverage. Integration of a MON definition with the airspace, avionics equipage and navigation infrastructure planning are essential factors to be considered. The CANSO NAV MON concept is designed to provide only a contingency capability independent of Air Traffic Service (ATS) Surveillance availability, thus no communication, navigation and surveillance (CNS) trade-offs are discussed.