The European Organisation for the Safety of Air Navigation ARINC 424A specification and SESAR WP9.31 AIXM Procedure Modelling/Encoding seminar Brussels – 01/02 Sept 2010 Hubert LEPORI Eurocontrol AIM Unit

ARINC 424A specification and SESAR WP Arinc424 specification 70’s: development of the first Flight Management Systems (FMS) Need for more an more complex embedded navigation databases to support evolving navigation techniques… Navigation data Arinc424 AIP

ARINC 424A specification and SESAR WP Arinc424 specification Arinc424: “Navigation System Data Base” sets forth the air transport industry’s recommended standards for the preparation of airborne navigation system reference data files. Version 1 published in May 1975 Version 19 published in December 2008 – applicable today Arinc424 committee 1 regular meeting per year to discuss on A424 change proposals

ARINC 424A specification and SESAR WP Arinc424 specification The Arinc424 specifies a format of navigation (and communication) data. Plain text - lines of 132 alphanumeric characters Navigation data: Airports, Runways, Navaids, Procedures Communication data: Com Services (ATIS…) The Arinc424 scope is not restricted to FMS data – it also includes data for Flight Planning systems, Simulation tools…

ARINC 424A specification and SESAR WP Arinc424 specification SEURP EBBREB BRU[………….]BRUSSELS ZAVENTEM A424-A Section 4 A424-A Section 5

ARINC 424A specification and SESAR WP Arinc424 specification A424 P/T are referenced in ICAO Performance-Based Navigation Manual

ARINC 424A specification and SESAR WP ANSPs AIP … Data providers … The current A424 data chain FMS suppliers AIP A424 $$

ARINC 424A specification and SESAR WP NDBX concept / Arinc424-A Since 2006, a technical group formed inside AEEC has been studying the feasibility to define and standardize an open source format for embedded navigation databases => NDBX based on the content of Arinc424 v.19 but restricted to FMS perimeter relying on a new UML model and on XML & Binary XML representation of the data In 2008, the decision was taken by the AEEC to merge the existing Arinc424 specification and the NDBX standard => Arinc424-A

ARINC 424A specification and SESAR WP Arinc424-A : the big picture ARINC NDBX (Embedded format Requirements) Input for the definition of ARINC424-A content ARINC424-A formats Script 1 Visual Basic “Bijection” between original A and Arinc424-A ASCII ARINC 424A ASCII (Legacy Format) ARINC424A BXML (embedded XML) Full ARINC424A XML Script 2 TBD ARINC424-A Model UML Adapted ARINC424 XML ? ARINC 424A

ARINC 424A specification and SESAR WP ANSPs AIP … Data providers … The future A424A-NDBX data chain (?) New generation of Avionic Systems AIP A424A B-XML $$

ARINC 424A specification and SESAR WP Eurocontrol’s involvement in Arinc424A : Eurocontrol participated in the initial NDBX committee and shared AIXM experience with the group : A Business Rules Working Group was formed inside the NDBX Committee, led by Eurocontrol and tasked with the development of an initial set of validation rules : Eurocontrol continues to support the development of the A424A specification through its contribution to SESAR project 9.31.

ARINC 424A specification and SESAR WP SESAR WP9.31 “Aeronautical Databases” Scope of WP 9.31 Structure and content of Navigation, Airport, Terrain & Obstacle DB Evolutions of the database production chain (focus on data integrity, performance…) WP9.31 includes some interaction with the ARINC424A standardisation group for the integration of new navigation database requirements

ARINC 424A specification and SESAR WP SESAR WP9.31 “Aeronautical Databases” 2010: Produce business rules for Arinc424-A, following the methodology used for the AIXM 5.1 business rules : ARINC 424A UML/XML/BXML FMS Simulation Define a set of mapping rules for conversion of ground sources (AIXM 5.1) into Arinc424A data (2011) - Regulatory framework - Identify the most effective means to ensure data integrity - Recommendations for DB packing, verification, certification Definition of Global Database Management Process Practically – validation of NavDB chain End User validation

ARINC 424A specification and SESAR WP Questions ?