These Guidelines specify the minimum requirements and provide comprehensive guidance for the definition, implementation, optimisation and operation of Area Proximity Warning (APW).
Part I - describes the APW concept of operations and specific requirements on APW
Part II - contains overall guidance for the complete lifecycle of APW
Part III - specifies a generic example of an APW implementation and provides detailed guidance for optimisation and testing of APW
Together with similar Guidelines for Short Term Conflict Alert (STCA), Approach Path Monitor (APM) and Minimum Safe Altitude Warning (MSAW), these documents provide Level 3 documentation for evolutionary improvement of ground-based safety nets.