The Filing Messages section provides an overview of ATC communication regarding a flight. Dispatch lists all sent flight plan messages and any AFTN messages received from ATC.
It’s important to note that you do not have to specify the message type to send. Dispatch automatically determines what sequence of messages to send so that the flight plan is accurately updated within ATC systems.
The following outbound messages can be sent by Dispatch:
- FPL - Outbound Flight Plan Message (FPL)
- CHG - Outbound Modification Messages (CHG). A CHG message is transmitted when changes are made to the flight plan data contained in a previously transmitted FPL.
- DLA - Outbound Delay Message (DLA). A Delay Message (DLA) is sent to ATC advising them of the new requested departure time.
- CNL - Outbound Cancellation (CNL) Message
- SPL - Outbound Supplementary Flight Plan Message (SPL). This message will only be sent in reply to a request for supplementary flight plan data.
For some regions of the world, such as the United States and European countries, Dispatch is able to interpret the messages coming in from ATC.
Dispatch supports the following incoming message types:
- ACK - Inbound Acknowledgement Message (ACK). ACK responses to FPL, CHG, DLA, and CNL messages
- REJ - Inbound Rejection Message (REJ). REJ responses to FPL, CHG, DLA, and CNL messages
- FLS - Flight plan suspension message sent by EUROCONTROL IFPS. These are sent if the flight plan gets suspended due to a route revalidation, or the aircraft has not taken off within 30 minutes of its ETD.
- DES - Flight plan de-suspension message sent by EUROCONTROL if a previously suspended flight plan becomes de-suspended
- SAM, SRM, and SLC - Slot allocation, revision, and cancellation messages. Sent by EUROCONTROL if the flight plan is issued a ground delay (slot time / CTOT)
- RQS, RQP - Sent by ATC if they are re-requesting the flight plan (RQP) or requesting supplementary information about the flight (RQS)
If Dispatch receives a message that cannot be automatically interpreted, the message is marked as UNK (unknown). If Dispatch receives an unknown message, a letter icon is put on the ATC Data tab and on the flight list to notify you of the unknown message.