This document defines the exchange of Aeronautical Operational Control (AOC) message formats used for air-to-ground communication and ground-to-ground communication. ARINC Specification 633 simplifies the integration of AOC software from different suppliers, intended for use by different airlines, on different aircraft types. It is expected that AOC applications will be hosted on an Electronic Flight Bags (EFB). Supplement 2 includes an extensive updates to the Flight Plan schema per ICAO Flight Plan 2012. New XML schemas are added to define AOC messages for airport weather, air traffic information services (ATIS), crew list, passenger list, notice to airmen, pilot report, and hazard advisory.