{{Short description|International standard file format for aircraft navigation data}} '''ARINC 424''' or '''ARINC 424 Navigation System Data Base Standard''' is an international standard file format for aircraft navigation data maintained by Airlines Electronic Engineering Committee and published by Aeronautical Radio, Inc. The ARINC 424 specifications are not a database, but a "standard for the preparation and transmission of data for assembly of airborne navigation system data bases".<ref>{{cite book |title=ARINC Specification 424-18: Navigation Systems Data Base |orig-date=1980-09-08 |edition=18 |date=2005-11-23 |publisher=Aeronautical Radio, Inc. |pages=2 |chapter=Introduction}}</ref><ref>{{cite web |url=https://www.arinc.com/cf/store/documentlist.cfm |archive-url=https://web.archive.org/web/20110525194906/https://www.arinc.com/cf/store/documentlist.cfm |url-status=dead |archive-date=2011-05-25 |title=ARINC Standards Document List |accessdate=2008-08-08 }}</ref>
ARINC 424 specifies a 132-byte fixed-length record format. Each record consists of one piece of navigation information such as an airport, heliport, runway, waypoints, navaids, airways, arrival routes, and departure routes.<ref>{{cite web|url=http://www.faa.gov/library/manuals/aviation/instrument_procedures_handbook/media/appndxA1.pdf |title=Evolution of Airborne Navigation Databases |accessdate=2008-08-08 |publisher=Federal Aviation Administration |url-status=dead |archiveurl=https://web.archive.org/web/20090824075852/http://www.faa.gov/library/manuals/aviation/instrument_procedures_handbook/media/appndxA1.pdf |archivedate=2009-08-24 }}</ref>
Since its initial publication in May 1975<ref>{{cite web|title=ARINC 424 Specification|url=http://www.eurocontrol.int/articles/arinc424-specification|publisher=Eurocontrol|accessdate=14 April 2016|archive-date=26 April 2016|archive-url=https://web.archive.org/web/20160426072854/http://www.eurocontrol.int/articles/arinc424-specification|url-status=dead}}</ref> ARINC 424 has been amended many times, introducing new record types and field values and revised coding rules as required by new technologies and classes of equipment such as GPS and Flight Management Computers. Each amendment is issued as a supplement, a format number suffix indicating the revision level of the standard. Supplement 22 was issued in July 2018, but the FAA currently publishes data in the older ARINC 424-18 format.<ref>[https://www.faa.gov/air_traffic/flight_info/aeronav/digital_products/cifp/download/ Coded Instrument Flight Procedures (CIFP), formerly the National Flight Database (NFD)]</ref>
== Integration with PBN and advanced navigation systems == Modern implementations of ARINC 424 have expanded beyond their original use for conventional navaid-based routes. The standard now supports complex performance-based navigation (PBN) elements, including RNP AR procedures, radius-to-fix (RF) legs, and vertical path coding for LPV and baro-VNAV approaches. These enhancements enable highly precise routing and procedure design in both fixed-wing and rotary-wing operations. As satellite-based augmentation systems (WAAS/GBAS) and advanced flight management systems (FMS) have evolved, ARINC 424 has remained the primary data standard for global navigation database interoperability.<ref>{{cite web |date=February 2019 |title=Airliner-Style PBN for Helicopters |url=https://interactive.aviationtoday.com/avionicsmagazine/february-2019/airliner-style-pbn-for-helicopters/ |access-date=October 6, 2025 |website=Avionics Magazine}}</ref><ref>{{cite web |date=January 2024 |title=Hughes Aerospace PBN Executive Summary |url=https://www.faasafety.gov/files/events/GL/GL15/2024/GL15127506/Hughes_Aerospace_PBN_Executive_Summary.pdf |access-date=October 6, 2025 |website=FAASafety.gov}}</ref>
==References== <references/>
==External links== * [http://www.aviation-ia.com/aeec/ Airlines Electronic Engineering Committee] * [https://web.archive.org/web/20130921055944/http://www.faa.gov/regulations_policies/handbooks_manuals/aviation/instrument_procedures_handbook/media/appendix-a.pdf Evolution of Airborne Navigation Databases] * [https://web.archive.org/web/*/http://www.ecacnav.com/downloads/5_Intro%20to%20ARINC424.ppt Introduction to ARINC 424] *[https://www.faa.gov/air_traffic/flight_info/aeronav/digital_products/cifp/download/ Coded Instrument Flight Procedures (CIFP), formerly the National Flight Database (NFD)], from the Federal Aviation Administration
{{DEFAULTSORT:Arinc 424}} Category:ARINC standards
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