A separation standard for departures transitioning from terminal to en route control

• Observations — Implementation of Performance Based Navigation (PBN) procedures enables terminal operations with increased navigational precision • Aim to enable more intensive use of airspace — Key separation standards are largely based on conventional operations and essentially unchanged for the better part of half a century • Increasingly incompatible with higher density terminal operations • Established-on-Departure Operation (EDO) Standard — Capitalizes on navigational precision of PBN operations • Extends applicability of the ELSO concept to operations transitioning from terminal to en route control — Employs defined divergence of PBN operations as key separation requirements • Aims to bridge acceptance shortfalls of today´s transitional separation — Provides departure procedure design flexibility and associated benefits • Earlier route divergence, reduced flight miles, more continuous departure climbs • Increased number of departure egress waypoints • Increased operational independence in multiple airport airspace • Reduced ATC task complexity • Next steps — Further concept validation