This document provides the minimum operational, Safety, and
Performance Requirements (SPR) and Interoperability 
equirements (INTEROP) for the implementation of Airborne
Traffic Situational Awareness (ATSA) for “Enhanced Visual
Separation on Approach” (VSA).  The ATSA-VSA application is
fully defined.   The document defines and allocates the set of
minimum requirements for the end-to-end operational, safety,
performance, and interoperability aspects for implementations
of the ATSA-VSA application.
 
The requirements contained in this document are necessary to
provide adequate assurance that the appropriate aspects of the
relevant Communication Navigation Surveillance and Air Traffic
Management (CNS/ATM) system, when operating together, will
perform their intended function in an acceptably safe manner
for the operations defined in the OSED.  The system here
includes ground and airborne elements.
The document was developed jointly by RTCA Special Committee
186 and EUROCAE Working Group 51 - within the group commonly
referred to as the “ADS-B Requirements Focus Group” (RFG).