Operational Information System


Operational Information System
Figure 1: Operational Information System (OIS)


Ground Stops:

  • Ground stops are when aircraft are held on the ground and not permitted to takeoff
  • Ground Stops are implemented for a number of reasons. The most common reasons are:
    • To control air traffic volume to airports when the projected traffic demand is expected to exceed the airport's acceptance rate for a short period of time
    • To temporarily stop traffic to allow time for the implementation of a longer-term solution, such as a Ground Delay Program
    • The affected airport's acceptance rate has been reduced to zero
  • The most widespread use of this procedure was on September 11, 2001

Ground Delay Programs:

  • The Ground Delay Program (GDP) is a traffic management process administered by the ATCSCC; when aircraft are held on the ground
  • The purpose of the program is to support the TM mission and limit airborne holding
  • It is a flexible program and may be implemented in various forms depending upon the needs of the AT system
  • Ground delay programs provide for equitable assignment of delays to all system users

Route Information:

  • Route information is available on the web site and in specific advisories
  • Some route information, subject to the 56-day publishing cycle, is located on the "OIS" under "Products," Route Management Tool (RMT), and "What's New" Playbook
  • The RMT and Playbook contain routings for use by Air Traffic and NAS operators when they are coordinated "real-time" and are then published in an ATCSCC advisory
  • Route advisories are identified by the word "Route" in the header; the associated action is Required (RQD), Recommended (RMD), Planned (PLN), or For Your Information (FYI)
  • Operators are expected to file flight plans consistent with the Route RQD advisories

Electronic System Impact Reports:

  • Available at" under "System Impact Reports"
  • This page lists scheduled outages/events/projects that significantly impact the NAS
  • Information includes anticipated delays and Traffic Management Initiatives (TMI) that may be implemented


  • This information is useful for pre-flight planning but remember, updates are published on a workload permitting basis