Minimum Safe Altitude Warning (MSAW) Guidelines

EUROCONTROL Guidelines for Minimum Safe Altitude Warning - Part I to III - EUROCONTROL-GUID-160 - PUBLISHED

Ground-based safety nets are functionalities within the ATM system with the sole purpose of monitoring the environment of operations in order to provide timely alerts of an increased risk to flight safety.

Minimum Safe Altitude Warning (MSAW) is a ground-based safety net that warns the controller about increased risk of controlled flight into terrain accidents by generating, in a timely manner, an alert of aircraft proximity to terrain or obstacles.

These Guidelines - mainly aiming at supporting Air Navigation Service Providers - specify the minimum requirements and provide comprehensive guidance for the definition, implementation, optimisation and operation of Minimum Safe Altitude Warning (MSAW).

PART I - describes the MSAW concept of operations and specific requirements on MSAW

PART II - contains overall guidance for the complete lifecycle of MSAW

PART III - specifies a generic example of an MSAW implementation and provides detailed guidance for optimisation and testing of MSAW


Together with similar Guidelines for Short Term Conflict Alert (STCA), Approach Path Monitor (APM) and Area Proximity Warning (APW), these documents provide Level 3 documentation for evolutionary improvement of ground-based safety nets.



These Guidelines have been developed following the EUROCONTROL Standards Development Process and have been submitted to a two-staged Informal Stakeholder Consultation before their final approval and publication.