The document provides the operational, safety, and performance 
requirements (SPR) for the implementation of data link services 
that support air traffic services (ATS) in continental 
airspace.  It is intended to support the implementation of 
communication, navigation, and surveillance / air traffic 
management (CNS/ATM) systems in worldwide application.


The SPR standard is intended for use with interoperability 
requirements (INTEROP) standards, and the guidelines described 
in RTCA DO-264 “Guidelines for Approval of the Provision and 
Use of Air Traffic Services Supported by Data Communications.”  
These requirements are necessary to provide adequate assurance 
that the elements of the CNS/ATM system, when operating 
together, will perform their intended function in an acceptably 
safe manner.