Appendix F Operational Definition in PANS-ATM (Doc 4444) CPDLC Message Sets Message Element Identifier Message Element Intended Use Format for Message Element Display Resp. FANS 1/A ATN B1 RTEU-12 Instruction to enter a holding pattern at the specified position in accordance with the published holding instructions.
Note: RTEU-13 EXPECT
FURTHER CLEARANCE AT TIME (time) is appended to this message when an extended hold is anticipated.
AT (position) HOLD AS
PUBLISHED W/U UM92 HOLD AT (position)
AS PUBLISHED MAINTAIN (altitude) UM92 HOLD AT (position) AS
PUBLISHED MAINTAIN (level) RTEU-13 Notification that an onwards clearance may be issued at the specified time.
EXPECT FURTHER
CLEARANCE AT TIME (time) R UM93 EXPECT
FURTHER
CLEARANCE AT (time) N/A RTEU-14 Notification that a clearance may be issued for the aircraft to fly the specified procedure or clearance name.
EXPECT (named instruction) R UM99 EXPECT (procedure name) Note: Used when a published procedure is designated.
UM169 ‘EXPECT (clearance name)’ Note: Used when an unpublished clearance/procedure name is designated.
N/A RTEU-15 Request to confirm the assigned route.
CONFIRM ASSIGNED ROUTE Y UM137 CONFIRM
ASSIGNED ROUTE Note: NE response attribute.
N/A F-5
Appendix F Operational Definition in PANS-ATM (Doc 4444) CPDLC Message Sets Message Element Identifier Message Element Intended Use Format for Message Element Display Resp. FANS 1/A ATN B1 RTEU-16 Request to make a position report.
REQUEST POSITION REPORT Y UM147 REQUEST
POSITION REPORT N/A RTEU-17 Request to provide the estimated time of arrival at the specified position.
ADVISE ETA (position) Y UM169 ‘ADVISE ETA (position)’ N/A F-6
Appendix F Table F-5. Route Downlink Message Elements (RTED) Operational Definition in PANS-ATM (Doc 4444) CPDLC Message Sets Message Element Identifier Message Element Intended Use Format for Message Element Display Resp. FANS 1/A ATN B1 RTED-1 Request for a direct clearance to the specified position.
REQUEST DIRECT TO (position) Y DM22 REQUEST DIRECT TO (position) DM22 REQUEST
DIRECT TO (position) RTED-2 Request for the specified procedure or clearance name.
REQUEST (named instruction) Y DM23 REQUEST (procedure name) N/A RTED-3 Request for the specified route. REQUEST CLEARANCE (departure data[O]) (en-route data) (arrival approach data[O]) Y DM24 REQUEST (route clearance) N/A RTED-4 Request for the specified clearance.
REQUEST (clearance type)
CLEARANCE Y DM25 REQUEST
CLEARANCE N/A RTED-5 Position report. POSITION REPORT (position report) N DM48 POSITION REPORT (position report) N/A RTED-6 Request for the specified heading.
REQUEST HEADING (degrees) Y DM70 REQUEST HEADING (degrees) N/A RTED-7 Request for the specified ground track.
REQUEST GROUND TRACK (degrees) Y DM71 REQUEST
GROUND TRACK (degrees) N/A RTED-8 Request for the time or position that can be expected to rejoin the cleared route.
WHEN CAN WE EXPECT
BACK ON ROUTE Y DM51 WHEN CAN
WE EXPECT BACK
ON ROUTE N/A RTED-9 Confirmation that the assigned route is the specified route.
ASSIGNED ROUTE (departure data[O]) (en-route data) (arrival approach data[O]) N DM40 ASSIGNED ROUTE (route clearance) N/A RTED-10 Notification of estimated time of arrival at the specified position.
ETA (position) TIME (time) N DM67 ‘ETA (position) TIME (time)’ N/A F-7
Appendix F Table F-6. Lateral Uplink Message Elements (LATU) Operational Definition in PANS-ATM (Doc 4444) CPDLC Message Sets Message Element Identifier Message Element Intended Use Format for Message Element Display Resp. FANS 1/A ATN B1 LATU-1 Instruction to fly a parallel track to the cleared route at a displacement of the specified distance in the specified direction.
OFFSET (specified distance) (direction) OF ROUTE W/U UM64 OFFSET (distance offset) (direction)
OF ROUTE UM64 OFFSET (specified distance) (direction)
OF ROUTE LATU-2 Instruction to fly a parallel track to the cleared route at a displacement of the specified distance in the specified direction and commencing at the specified position.
AT (position) OFFSET (specified distance) (direction) OF ROUTE W/U UM65 AT (position) OFFSET (distance offset) (direction)
OF ROUTE N/A LATU-3 Instruction to fly a parallel track to the cleared route at a displacement of the specified distance in the specified direction and commencing at the specified time.
AT TIME (time) OFFSET (specified distance) (direction) OF ROUTE W/U UM66 AT (time) OFFSET (distance offset) (direction) OF ROUTE N/A LATU-4 Instruction to rejoin the cleared route.
REJOIN ROUTE W/U UM67 PROCEED
BACK ON ROUTE N/A LATU-5 Instruction to rejoin the cleared route before passing the specified position.
REJOIN ROUTE BEFORE PASSING (position) W/U UM68 REJOIN ROUTE BY (position) N/A LATU-6 Instruction to rejoin the cleared route before the specified time.
REJOIN ROUTE BEFORE TIME (time) W/U UM69 REJOIN ROUTE BY (time) N/A LATU-7 Notification that a clearance may be issued to enable the aircraft to rejoin the cleared route before passing the specified position.
EXPECT BACK ON ROUTE BEFORE PASSING (position) R UM70 EXPECT
BACK ON ROUTE BY (position) N/A F-8
Appendix F Operational Definition in PANS-ATM (Doc 4444) CPDLC Message Sets Message Element Identifier Message Element Intended Use Format for Message Element Display Resp. FANS 1/A ATN B1 LATU-8 Notification a clearance may be issued to enable the aircraft to rejoin the cleared route before the specified time.
EXPECT BACK ON ROUTE BEFORE TIME (time) R UM71 EXPECT
BACK ON ROUTE BY (time) N/A LATU-9 Instruction to resume own navigation following a period of tracking or heading clearances.
May be used in conjunction with an instruction on how or where to rejoin the cleared route.
RESUME OWN
NAVIGATION W/U UM72 RESUME
OWN NAVIGATION UM72 RESUME
OWN NAVIGATION LATU-10 Instruction allowing deviation up to the specified distance(s) from the cleared route in the specified direction(s).
CLEARED TO DEVIATE UP TO (lateral deviation)
OF ROUTE W/U UM82 CLEARED TO
DEVIATE UP TO (distance offset) (direction)
OF ROUTE UM82 CLEARED TO
DEVIATE UP TO (specified distance) (direction)
OF ROUTE LATU-11 Instruction to turn left or right as specified on to the specified heading.
TURN (direction) HEADING (degrees) W/U UM94 TURN (direction) HEADING (degrees) UM94 TURN (direction) HEADING (degrees) LATU-11 Instruction to turn left or right as specified on to the specified heading.
TURN (direction) HEADING (degrees) W/U UM98
IMMEDIATELY TURN (direction) HEADING (degrees) Note: This message element is equivalent to EMGU-2 plus LATU-11 in ICAO Doc 4444.
N/A LATU-12 Instruction to turn left or right as specified on to the specified track.
TURN (direction) GROUND TRACK (degrees) W/U UM95 TURN (direction)
GROUND TRACK (degrees) N/A F-9
Appendix F Operational Definition in PANS-ATM (Doc 4444) CPDLC Message Sets Message Element Identifier Message Element Intended Use Format for Message Element Display Resp. FANS 1/A ATN B1 LATU-13 Instruction to turn the specified number of degrees left or right.
TURN (direction) (number of degrees) DEGREES W/U N/A UM215 TURN (direction) (degrees) LATU-14 Instruction to continue to fly the present heading.
CONTINUE PRESENT
HEADING W/U UM96 FLY PRESENT
HEADING UM96 CONTINUE
PRESENT HEADING LATU-15 Instruction to fly the specified heading upon reaching the specified position.
AT (position) FLY HEADING (degrees) W/U UM97 AT (position)
FLY HEADING (degrees) N/A LATU-16 Instruction to fly the specified heading.
FLY HEADING (degrees) W/U N/A UM190 FLY HEADING (degrees) LATU-17 Instruction to report when clear of weather.
REPORT CLEAR OF
WEATHER W/U UM169 ‘REPORT
CLEAR OF WEATHER’ Note: R response attribute.
N/A LATU-18 Instruction to report when the aircraft is back on the cleared route.
REPORT BACK ON ROUTE W/U UM127 REPORT
BACK ON ROUTE Note: R response attribute.
N/A LATU-19 Instruction to report upon passing the specified position.
REPORT PASSING (position) W/U UM130 REPORT PASSING (position) Note: R response attribute.
N/A F-10
Appendix F Table F-7. Lateral Downlink Message Elements (LATD) Operational Definition in PANS-ATM (Doc 4444) C PDLC Message Sets Message Element Identifier Message Element Intended Use Format for Message Element Display Resp. FANS 1/A ATN B1 LATD-1 Request for a parallel track from the cleared route at a displacement of the specified distance in the specified direction.
REQUEST OFFSET (specified distance) (direction)
OF ROUTE Y DM15 REQUEST OFFSET (specified distance) (direction)
OF ROUTE N/A LATD-2 Request for a weather deviation up to the specified distance(s) off track in the specified direction(s).
REQUEST WEATHER
DEVIATION UP TO (lateral deviation) OF ROUTE Y DM27 REQUEST
WEATHER
DEVIATION UP TO (specified distance) (direction)
OF ROUTE DM27 REQUEST
WEATHER
DEVIATION UP TO (specified distance) (direction)
OF ROUTE LATD-3 Report indicating that the aircraft is clear of weather.
CLEAR OF WEATHER N DM69 ‘CLEAR OF WEATHER’ N/A LATD-4 Report indicating that the cleared route has been rejoined.
BACK ON ROUTE N DM41 BACK ON ROUTE N/A LATD-5 Report indicating diverting to the specified position via the specified route, which may be sent without any previous coordination done with ATC.
DIVERTING TO (position) VIA (en-route data) (arrival approach data[O]) Y DM59 DIVERTING TO (position) VIA (route clearance) Note 1: H alert attribute.
Note 2: N response attribute.
N/A LATD-6 Report indicating that the aircraft is offsetting to a parallel track at the specified distance in the specified direction off from the cleared route.
OFFSETTING (specified distance) (direction) OF ROUTE Y DM60 OFFSETTING (distance offset) (direction)
OF ROUTE Note 1: H alert attribute.
Note 2: N response attribute.
N/A F-11
Appendix F Operational Definition in PANS-ATM (Doc 4444) C PDLC Message Sets Message Element Identifier M essage Element Intended Use Format for Message Element Display R esp. FANS 1/A ATN B1 LATD-7 Report indicating deviating specified distance or degrees in the specified direction from the cleared route.
DEVIATING (Specified Deviation) (direction) OF ROUTE Y DM80 DEVIATING (Deviation Offset) (direction) OF ROUTE Note 1: H alert attribute.
Note 2: N response attribute.
N/ A LATD-8 Report indicating passing the specified position.
PASSING (position) N DM31 PASSING (position) N/ A F-12
Appendix F Table F-8. Level Uplink Message Elements (LVLU) Operational Definition in PANS-ATM (Doc 4444) CPDLC Message Sets Message Element Identifier Message Element Intended Use Format for Message Element Display Resp. FANS 1/A ATN B1 LVLU-1 Notification that an instruction may be expected for the aircraft to commence climb at the specified time.
EXPECT HIGHER AT TIME (time) R UM7 EXPECT CLIMB AT (time) N/A LVLU-2 Notification that an instruction may be expected for the aircraft to commence climb at the specified position.
EXPECT HIGHER AT (position) R UM8 EXPECT CLIMB AT (position) N/A LVLU-3 Notification that an instruction may be expected for the aircraft to commence descent at the specified time.
EXPECT LOWER AT TIME (time) R UM9 EXPECT DESCENT AT (time) N/A LVLU-4 Notification that an instruction may be expected for the aircraft to commence descent at the specified position.
EXPECT LOWER AT (position) R UM10 EXPECT
DESCENT AT (position) N/A LVLU-5 Instruction to maintain the specified level or vertical range.
MAINTAIN (level) W/U UM19 MAINTAIN (altitude) Note: Used for a single level.
UM30 MAINTAIN BLOCK (altitude) TO (altitude) Note: Used for a vertical range.
UM19 MAINTAIN (level) F-13
Appendix F Operational Definition in PANS-ATM (Doc 4444) CPDLC Message Sets Message Element Identifier Message Element Intended Use Format for Message Element Display Resp. FANS 1/A ATN B1 LVLU-6 Instruction that a climb to the specified level or vertical range is to commence and once reached is to be maintained.
CLIMB TO (level) W/U UM20 CLIMB TO
AND MAINTAIN (altitude) Note: Used for a single level.
UM31 CLIMB TO
AND MAINTAIN BLOCK (altitude) TO (altitude) Note: Used for a vertical range.
UM20 CLIMB TO (level) LVLU-6 Instruction that a climb to the specified level or vertical range is to commence and once reached is to be maintained.
CLIMB TO (level) W/U UM36 EXPEDITE CLIMB TO (altitude) Note: This message element is equivalent to SUPU-3 plus LVLU-6 in ICAO Doc 4444.
UM38
IMMEDIATELY CLIMB TO (altitude) Note: This message element is equivalent to EMGU-2 plus LVLU-6 in ICAO Doc 4444.
N/A F-14
Appendix F Operational Definition in PANS-ATM (Doc 4444) CPDLC Message Sets Message Element Identifier Message Element Intended Use Format for Message Element Display Resp. FANS 1/A ATN B1 LVLU-7 Instruction that at the specified time a climb to the specified level or vertical range is to commence and once reached is to be maintained.
Note: This message element would be preceded with LVLU-5 MAINTAIN (level), to prevent the premature execution of the instruction.
AT TIME (time) CLIMB TO (level) W/U UM21 AT (time)
CLIMB TO AND MAINTAIN (altitude) Note: A vertical range cannot be provided.
N/A LVLU-8 Instruction that at the specified position a climb to the specified level or vertical range is to commence and once reached is to be maintained.
Note: This message element would be preceded with LVLU-5 MAINTAIN (level), to prevent the premature execution of the instruction.
AT (position) CLIMB TO (level) W/U UM22 AT (position)
CLIMB TO AND MAINTAIN (altitude) Note: A vertical range cannot be provided.
N/A LVLU-9 Instruction that a descent to the specified level or vertical range is to commence and once reached is to be maintained.
DESCEND TO (level) W/U UM23 DESCEND TO
AND MAINTAIN (altitude) Note: Used for a single level.
UM23 DESCEND TO (level) F-15
Appendix F Operational Definition in PANS-ATM (Doc 4444) CPDLC Message Sets Message Element Identifier Message Element Intended Use Format for Message Element Display Resp. FANS 1/A ATN B1 LVLU-9 Instruction that a descent to the specified level or vertical range is to commence and once reached is to be maintained.
DESCEND TO (level) W/U UM32 DESCEND TO
AND MAINTAIN BLOCK (altitude) TO (altitude) Note: Used for a vertical range.
UM39
IMMEDIATELY
DESCEND TO (altitude) Note: This message element is equivalent to EMGU-2 plus.
N/A LVLU-10 Instruction that at the specified time a descent to the specified level or vertical range is to commence and once reached is to be maintained.
AT TIME (time) DESCEND TO (level) W/U UM24 AT (time)
DESCEND TO AND MAINTAIN (altitude) Note: A vertical range cannot be provided.
N/A LVLU-11 Instruction that at the specified position a descent to the specified level or vertical range is to commence and once reached is to be maintained.
AT (position) DESCEND TO (level) W/U UM25 AT (position)
DESCEND TO AND MAINTAIN (altitude) Note: A vertical range cannot be provided.
N/A LVLU-12 Instruction that a climb is to be completed such that the specified level is reached before the specified time.
CLIMB TO REACH (level single) BEFORE TIME (time) W/U UM26 CLIMB TO REACH (altitude) BY (time) UM26 CLIMB TO REACH (level) BY (time) LVLU-13 Instruction that a climb is to be completed such that the specified level is reached before passing the specified position.
CLIMB TO REACH (level single) BEFORE PASSING (position) W/U UM27 CLIMB TO REACH (altitude) BY (position) UM27 CLIMB TO REACH (level) BY (position) F-16