This document provides an evolutionary concept of operations 
from the perspectives of National Airspace System (NAS) users 
and service providers.  This concept covers the transition from 
the current NAS through three distinct timeframes: the year 
2000, the year 2005, and the time when mature Free Flight 
occurs.  It is intended to incorporate the needs and 
requirements of NAS users and service providers and to serve as 
the basis for an incremental and a benefits-driven approach 
towards Free Flight. It is also intended to form the basis for 
both the Federal Aviation Administration (FAA) and the user 
community to plan procedural, investment and architectural 
decisions that will provide the operational capabilities needed 
to achieve Free Flight.

NOTE:  The electronic Government / Industry Operational Concept
for the Evolution of Free Flight, Edition 2, is a pdf file but
it is not in searchable format.