B. AOC Applications Description
 There are three types of AOC applications:
 (1) AOC Type 1 Most of the AOC applications belong to this category. The main functions of these applications are to:
 -collect information from on-board systems
 -transmit and receive air/ground ARINC 618 messages
 -allow the crew to enter information through the MCDU
 -display and print messages and information collected from on-board systems or messages received from the ground
 -transmit reports manually through the MCDU, automatically or on ground request.
 NOTE : Some specific AOC Type 1 applications also generate ARINC 429
____ broadcast data, such as OOOI data (Out/On/Off/In indicates the aircraft situation: at gate, A/C moving before takeoff, takeoff or touch-down).
 (a) Flight operations applications The following table describes the different flight operations applications:
 -------------------------------------------------------------------------------
| Flight Ops  |  Description  |  Downlink (DN) |  Report Description  |
 | Application  |  |  or  |  |
 |  |  |  Uplink (UP)  |  |
 |  |  |  messages  |  |

 -------------------------------------------------------------------------------| Downlink reports | Enables crew | DN: Crew | Only contains free text| | transmission | to enter | report (3I)| information. | | | information -------------------------------------------| | through MCDU | DN: Departure | Informs the ground of a| | | (free text | delay | departure delay. | | | and/or pre-| report (3O)| | | | defined -------------------------------------------| | information, | DN: Take off | Informs the ground of a| | | acquired from | delay | departure delay. | | | peripherals | report (3H)| | | from the -------------------------------------------| | ground), and | DN: Enroute | Informs the ground of | | | initiate the | delay | an enroute delay. | | | transmission | report (33)| | | of a specific -------------------------------------------| | report. | DN: Gate | Informs the ground of | | | | delay | a gate delay. |
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 -------------------------------------------------------------------------------
| Flight Ops | Description | Downlink (DN) | Report Description | | Application | | or | | | | | Uplink (UP) | | | | | messages | | -------------------------------------------------------------------------------| | | report (36)| | | -------------------------------------------| | | DN: Dispatch | | | | | report (3J)| | | | -------------------------------------------| | | DN: Diversion | Informs the ground that| | | | report (31)| the A/C is diverted to | | | | | an alternate airport. | | | -------------------------------------------| | | DN: Emergency | Informs the ground that| | | | report (00)| the A/C is being | | | | (7500 RPT) | hijacked and gives some| | | | | information about the | | | | | hijackers. | | | -------------------------------------------| | | DN: ETA | Informs the ground of | | | | report (34)| the estimated time of | | | | | arrival. | | | -------------------------------------------| | | DN: Flight | At the end of the | | | | summary | flight, this report is | | | | report (35)| sent. It contains a | | | | | summary of the Ops | | | | | parameters of the | | | | | flight: fuel on board, | | | | | OOOI times, Officers' | | | | | names, type of | | | | | approach... | | | -------------------------------------------| | | DN: In range | Informs the airline | | | | report (37)| that A/C will meet the | | | | | estimated time of | | | | | arrival. Contains also | | | | | the estimated ramp | | | | | time... | | | -------------------------------------------| | | DN: Ops | Normal report (3M) | | | | report | Control report (3A) | | | -------------------------------------------| | | DN: Position/ | Informs the airline | | | | Weather | with weather data. |
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 -------------------------------------------------------------------------------
| Flight Ops | Description | Downlink (DN) | Report Description | | Application | | or | | | | | Uplink (UP) | | | | | messages | | -------------------------------------------------------------------------------
|  |  |  report (3C)| The airline Flight Ops |
 |  |  |  | center elaborates a  |
 |  |  |  | weather data base in  |
 |  |  |  | real time with the  |
 |  |  |  | data sent by all A/C.  |
 |  |  -------------------------------------------
|  |  | DN: Stations  |  |
 |  |  |  report (3K)|  |
　
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