2.4 Airborne Information for Lateral Spacing Airborne Information for Lateral Spacing (AILS) is an airborne-based concept for landing under instrument conditions at airports with closely-spaced parallel runways. An airline's ability to maintain schedules is severely impacted when one or more airports are forced to curtail independent parallel approaches because of inclement weather. The AILS concept alerts the crew of flight path deviations and potential collision threats. The Primary Flight Display and Navigation Display depict a message requiring the crew to fly the procedural emergency escape maneuver to ensure continued safe separation between the aircraft. The AILS system would safely maintain high airport acceptance rates under conditions not possible with current systems and procedures. AILS provides an independent instrument approach capability applicable to parallel runways with centerline spacing within the range for most domestic hub airports. A flight demonstration of AILS was held in mid-1999 by NASA and Honeywell, Inc. at Minneapolis-St. Paul International Airport. This successful event allowed industry, airline, and government representatives to witness continued safe separation between aircraft, even under simulated flight conflicts. This was a key achievement on the path to a flight-certifiable system to be developed by industry. NASA POC: Brad Perry 757-864-8257 raleigh.b.perry@larc.nasa.gov

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