ARINC618-9 618-9 Air/Ground Character-Oriented Protocol Specification

This standard defines the Aircraft Communications Addressing and Reporting System (ACARS), a VHF data link that transfers character-oriented data between aircraft systems and ground systems. This communications facility enables the aircraft to operate as part of the airline's command, control and management system.

The latest revision to the standard provisions for the ATN/IPS protocol, complementing other defined protocols, e.g., POA (VDL Mode 0/A) and ACARS over AVLC (AOA).