Fact Sheet – Equivalent Lateral Spacing Operations (ELSO)
Addtime：2015-04-22 14:47

ELSO allows controllers to space routes more closely together and safely clear aircraft for takeoff more efficiently. This is possible because aircraft equipped with performance-based navigation are able to fly precise paths with pinpoint accuracy, giving controllers more certainty about the aircraft’s path. When controllers know the aircraft’s exact path on take-off, they don’t have to build an extra cushion of airspace around the plane to account for variations in the flight path. Current air traffic rules require a 15-degree minimum angle between departure routes to provide that certainty. With ELSO, controllers can reduce the minimum to 10 degrees between departure headings in Atlanta, allowing four flights to depart in the same area that previously accommodated only three flights. This flexibility makes it possible for controllers to clear as many as eight to 12 additional departures every hour, providing a huge benefit for the airport.

This innovative concept also benefits air traffic controllers and airlines by freeing up airspace and reducing taxi-time. It translates to millions of dollars in fuel savings per year –  nearly $20 million dollars per year in Atlanta. If demand increases just 10 percent, the savings will more than double to $50 million per year.

For the passenger, the increased efficiency equates to nearly one-and-a-half years of cumulative savings in reduced taxi and departure times. It benefits the environment because aircraft spend less time on the ground with engines idling, burning less fuel and decreasing pollution.

ELSO is just one of a number of innovative strategies under NextGen that will help to streamline our nation’s airspace and reduce complexity for air traffic controllers and airlines.

Source: FAA

Prev：IATA Launches Standard Safety Assessment Program

Next：EASA thoroughly modernises rules for Performance Based Navigation