-
assigned route (message 40)
-time over reported waypoint (message 46)
-reported waypoint (message 45)
-
next waypoint (message 42)
-
next waypoint ETA (message 43)
-ensuing waypoint (message 44)
-
present heading (message 35)
-
present ground track (message 36)
-at time distance to/from position (message 78). The confirm downlink message is sent to the ATSU in response to an uplinked ATC request for confirmation. Note that the downlink message 32: 'Present altitude (altitude)' (in response to the upluik message 133: 'Confirm altitude') will be completed by downlink message 29: 'Climbing to (altitude)' or message
30: 'Descending to (altitude)'.
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ATC Deferred clearances: An ATC Deferred clearance is an ATC clearance that is activated when a specific condition (eg., AT (time) PROCEED DIRECT TO (position)) is met. An ATC Deferred clearance consists of two parts:
-
A conditional part (eg., 'AT (time)')
-
A clearance (eg., 'PROCEED DIRECT TO (position)').
Three types of conditions are available and consist of a specified
time, a specified altitude or a specified position.
ATC deferred clearances function provides help to the crew by:
-Monitoring the establishment of the conditional part of the
deferred clearances,
-
Informing the ATSU that the condition is predicted to be met in 30 sec in most of the cases,
-
Informing the ATSU when the condition is actually met. Note that only the conditional part of the Deferred Clearance is transmitted by the ATSU to the FM.
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ADS Applications ADS applications are managed by the ATSU. Therefore, ATSU is in charge of receiving ground contracts, concentrating required information and responding to the ground in the given time. FMS broadcasts periodically all the parameters necessary to format complete ADS reports. ATSU gathers and formats these paramaters according to norms.
ADS functions require the transmission downlink of many FMS
parameters (from FMS to ATSU) and of some parameters uplink (from
ATSU to FMS) necessary for FM computations.
Two different collection mechanisms are used to transmit ADS data:
-Frames for groups of data requiring consistency.
-Dynamic labels for other data.
To meet ADS requirements, four different frames have been defined.
-
A basic frame indicating aircraft location associated to the quality of this location.
-
A predicted route frame with flight plan waypoints predicted location and time.
-An intermediate intent frame providing the next intermediate waypoints where an altitude target, track target or speed target change is predicted to occur.
-A fixed intent frame providing the predicted location of the
aircraft at a given time.
Two different refreshed periods have been defined:
-1 second for basic frame,
-10 seconds for predicted route, intermediate intent, fixed intent
frames. Other dynamic data also required for ADS (eg Flight number, True Track, vertical speed, etc.) must be sent on dynamic labels with a 1 second refresh rate.
C. PRINT Function
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General description The PRINT function allows various FM reports to be printed, either automatically or on manual action. This function is completely independent of the ACARS function. Additionally, several features of the PRINT function are optionally programmable either through the AOC policy file of the AMI (Ref. Para. D-(1)) or through manual selection on the MCDU. Several types of reports can be printed. These include flight plan initialization data, takeoff data, wind data and flight report data. Flight plan data, takeoff data and wind data can be either data uplinked via the ACARS or actual system data. Flight report data are available as pre-flight, in-flight and post-flight information, composed of predicted data, actual data or a combination of the two. ACARS-generated flight plan initialization, takeoff and wind data may be printed when they are received and checked by the FM if the automatic print function is activated within the AOC policy file of the AMI and on the PRINT FUNCTION page. Current FM flight plan initialization, takeoff and wind data may be printed upon manual action by pushing the line key adjacent to the PRINT indication on the PRINT FUNCTION page. FM-generated flight reports may be automatically printed at predefined events if the automatic print function is activated within the AOC policy file of the AMI and on the PRINT FUNCTION page or upon manual action by pushing the line key adjacent to the PRINT indication on the PRINT FUNCTION page. Generally, a print report initiated by a manual action consists of FM data whereas a report initiated automatically consists of ACARS uplinked data (an exception occurs for flight reports which may be printed automatically). Manually-initiated reports can be generated at any time. However, the printing of the flight plan initialization, takeoff and wind reports are mutually exclusive of each other; only one present report can be active at a time, although the print requests may be queued. While a report is printing (either manually or automatically initiated), triggers for automatic printing of the same type of report are ignored. In the following sections, example printed sheets are given for each report. As continuous paper supply is assumed for the printer, report printouts will not have page breaks and repeated header information.
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