ARINC 424-21 : 2016

1.0 INTRODUCTION
1.1 Purpose of this Document
1.2 Data Format Standardization Philosophy
1.3 Organization of this Document
1.4 Reference Documentation
2.0 GLOSSARY OF TERMS
2.1 Data Processing Terms
2.2 Special Navigation Terms
3.0 NAVIGATION DATA
3.1 User File Organization
3.2 Master Airline User File Content
3.3 Master Helicopter User File Content
4.0 NAVIGATION DATA - RECORD LAYOUT
4.1 Master Airline User File
4.2 Master Helicopter User File (HA)
5.0 NAVIGATION DATA - FIELD DEFINITIONS
6.0 ENCODING STANDARDS
6.1 General
6.2 Header Records
6.3 Bit Density
6.4 Coding
6.5 Parity Convention
6.6 Reel-File Relationship
6.7 Labels
6.8 Tape Marks
6.9 Summary of Tape Data Layout
6.10 CRC Calculations
6.11 Application of CRC for Integrity Protection
     of Straight and Advanced Landing
     Approach Operations
7.0 NAMING CONVENTIONS
7.1 General
7.2 Fix Identifiers
7.3 Waypoint Name/Description
7.4 SID/STAR Procedure Identifiers
7.5 Preferred Route Identifiers
7.6 Transition Identifiers
ATTACHMENTS
ATTACHMENT 1 - FLOW DIAGRAM
ATTACHMENT 2 - LOCAL HORIZONTAL REFERENCE DATUM
               NAME, DATUM CODE, ELLIPSOID LIST,
               AND OGP REFERENCE
ATTACHMENT 3 - NAVIGATION DATA FILE RELATIONSHIPS
ATTACHMENT 4 - AIRWAY MINIMUM ALTITUDES AND
               REQUIRED NAVIGATION PERFORMANCE (RNP)
ATTACHMENT 5 - PATH AND TERMINATOR

Gives a database comprising standards used for the preparation of a navigation system data base.