ENR 7.2: Data Link Procedures
1. Oakland Oceanic Airspace
1.1 Oakland ARTCC has full CPDLC and ADS-C services in the entire Oakland Oceanic FIR for FANS-1/A capable aircraft. The Oakland Oceanic FIR log-on address is “KZAK;" the facility is “OAKODYA." CADS LOGON is not supported.
1.2 The use of CPDLC and ADS-C in the Oakland Oceanic FIR (KZAK) is only permitted by Inmarsat and Iridium customers. All other forms of data link connectivity are not authorized. Users must ensure that the proper data link code is filed in Item 10a of the ICAO FPL in order to indicate which satellite medium(s) the aircraft is equipped with. The identifier for Inmarsat is J5 and the identifier for Iridium is J7. If J5 or J7 is not included in the ICAO FPL, then the LOGON will be rejected by KZAK and the aircraft will not be able to connect.
1.3 Prior to entering the Oakland Oceanic FIR, contact San Francisco Radio and request a SELCAL check.
2. Pilots must maintain HF communications capability with San Francisco Radio at all times within the Oakland Oceanic FIR.
1.4 Aircraft entering the Oakland Oceanic FIR data link service area from non-data link airspace should:
1.4.1 Log on to CPDLC at least 15 but not more than 45 minutes prior to entering the Oakland Oceanic FIR CPDLC service area.
1.4.2 Contact San Francisco Radio on HF for a SELCAL check.
1.5 Aircraft entering the Oakland Oceanic FIR data link service area from adjacent data link airspace should:
1.5.1 Determine the status of the CPDLC connection. If KZAK is the active center, the pilot must contact San Francisco Radio on HF for a SELCAL check.
1.5.2 If KZAK is not the active center, the pilot must, within 5 minutes after the boundary is crossed, terminate the CPDLC connection, then log on to KZAK, and contact San Francisco Radio on HF for a SELCAL check.
1.6 Flights overflying Honolulu Control Facility (HCF) airspace will receive an END SERVICE message prior to entering HCF airspace that will result in termination of CPDLC. Aircraft must re-log on to CPDLC prior to reentering Oakland Oceanic FIR airspace when HCF advises to contact en route communications or San Francisco Radio.
1.7 Flights overflying Guam Combined Center Radar Approach Control (CERAP) airspace should maintain the CPDLC connection with Oakland ARTCC; however, do not use CPDLC for ATC COM until Guam CERAP advises you to again contact en route communications or San Francisco Radio.
2. Anchorage Oceanic Airspace
2.1 Anchorage ARTCC has full CPDLC capability and normal service in the Arctic FIR for FANS-1/A capable aircraft within INMARSAT or Iridium coverage. The Anchorage Arctic FIR log‐on address is “PAZN;" the facility is “ANCXFXA." CADS LOGON is not supported.
2.2 Anchorage ARTCC has full CPDLC capability and normal service in the Anchorage Domestic and Oceanic FIRs, South of N63 and west of W165 for FANS-1/A capable aircraft. The Anchorage log‐on address is “PAZN;" the facility is “ANCATYA." CADS LOGON is not supported.
2.3 Prior to entering the Anchorage Oceanic FIR, contact San Francisco Radio and request a SELCAL check.
2. Expect to receive primary and secondary HF frequency assignments from San Francisco Radio for the entire route of flight when within the Anchorage Oceanic FIR.
3. Pilots must maintain HF communications capability with appropriate en route RADIO (San Francisco Radio or Gander) at all times within the Anchorage Arctic or Oceanic FIRs.
3. New York Oceanic Airspace
3.1 New York ARTCC provides full CPDLC and ADS-C services throughout its Oceanic Airspace to FANS-1/A capable flights. The New York Oceanic FIR FANS LOGON address is “KZWY." CADS LOGON is not supported. Flights should use ADS for position reporting and CPDLC for all other ATC communications while in the New York Oceanic Area.
3.2 The use of CPDLC and ADS-C in the New York Oceanic FIR (KZWY) is only permitted by Inmarsat and Iridium customers. All other forms of data link connectivity are not authorized. Users must ensure that the proper data link code is filed in Item 10a of the ICAO FPL in order to indicate which satellite medium(s) the aircraft is equipped with. The identifier for Inmarsat is J5 and the identifier for Iridium is J7. If J5 or J7 is not included in the ICAO FPL, then the LOGON will be rejected by KZWY and the aircraft will not be able to connect.
3.3 Prior to entering the New York Oceanic FIR, contact New York Radio and request a SELCAL check.
2. Pilots must maintain HF communications capability with New York Radio at all times within the New York Oceanic FIR.
3. If not filed in the flight plan, NY Radio will request if the flight is CPDLC connected and confirm their exit point from the New York FIR.
3.4 If the flight will exit ZNY oceanic airspace into domestic airspace (including over New York Bermuda RADAR):
3.4.1 Identify the flight as ADS and/or CPDLC connected;
3.4.2 If operating on the Organized Track System (OTS), state the track letter;
3.4.3 State the name of the next CTA/FIR to be entered along with the latitude and longitude or waypoint exit point leaving the ZNY FIR; and
3.4.4 Request a SELCAL check.
3.5 Aircraft entering the New York Oceanic FIR data link service area from non-data link airspace should:
3.5.1 LOGON to KZWY at least 15 minutes but not more than 45 minutes prior to entering the New York Oceanic CTA/FIR.
3.5.2 Prior to entering the New York Oceanic FIR contact New York Radio on HF or VHF providing the information as outlined in paragraph 3.3.
3.6 Aircraft entering the New York Oceanic FIR data link service area from adjacent data link airspace should:
3.6.1 Determine the status of the FANS connection when crossing the New York Oceanic FIR boundary.
3.6.1.1 If KZWY is the active connection when crossing the New York Oceanic FIR boundary the pilot must:
3.6.1.2 Contact New York Radio on HF providing the information as outlined in paragraph 3.3.
3.6.2 If KZWY is not the active center when crossing the New York Oceanic FIR boundary the pilot must:
3.6.2.1 Terminate the CPDLC connection, then log-on to KZWY; and
3.6.2.2 Contact New York Radio on HF providing the information as outlined in paragraph 3.3.
3.7 Flights overflying Bermuda RADAR airspace should:
3.7.1 Prior to entering New York Bermuda RADAR airspace, aircraft will receive an END SERVICE message that will result in termination of CPDLC.
3.7.2 Aircraft must re-log-on to KZWY prior to re-entering the New York Oceanic CTA/FIR when they are advised by ATC to contact New York Radio on HF.
3.8 Aircraft exiting the KZWY data link service area and approaching New York Center Domestic, New York Center Bermuda RADAR, San Juan, Piarco, Jacksonville, Miami, Moncton, and Gander Domestic can expect a CPDLC uplink message containing the VHF frequency assignment for the next facility. CPDLC End Service will be sent approximately 5 minutes prior to the boundary crossing point.
4. Data Link Failure
4.1 In the event of data link failure or outages, flight crews must contact New York Radio or San Francisco Radio via HF voice for routine communications. When unable to communicate on HF, the pilot may conduct normal and routine communications with ATC via New York Radio or San Francisco Radio on SATVOICE. Direct SATVOICE contact with ATC should be limited to distress and urgency situations or when other means are not available and communication is essential.
TBL ENR 7.2-1 Response Attribute of CPDLC Message Element
|
Response |
Description |
|
For Uplink Message |
|
|
W/U |
Response required. Valid responses. WILCO, UNABLE, STANDBY, NOT CURRENT DATA AUTHORITY, NOT AUTHORIZED NEXT DATA AUTHORITY, LOGICAL ACKNOWLEDGEMENT (only if required), ERROR Note – WILCO, UNABLE, NOT CURRENT DATA AUTHORITY, NOT AUTHORIZED NEXT DATA AUTHORITY and ERROR will close the uplink message. FANS 1/A.– WILCO, UNABLE, STANDBY, ERROR, NOT CURRENT DATA AUTHORITY. |
|
A/N |
Response required. Valid responses. AFFIRM, NEGATIVE, STANDBY, NOT CURRENT DATA AUTHORITY, NOT AUTHORIZED NEXT DATA AUTHORITY, LOGICAL ACKNOWLEDGEMENT (only if required), ERROR Note – AFFIRM, NEGATIVE, NOT CURRENT DATA AUTHORITY, NOT AUTHORIZED NEXT DATA AUTHORITY and ERROR will close the uplink message. FANS 1/A.– AFFIRM, NEGATIVE, STANDBY, ERROR, NOT CURRENT DATA AUTHORITY. |
|
R |
Response required. Valid responses. ROGER, UNABLE, STANDBY, NOT CURRENT DATA AUTHORITY, NOT AUTHORIZED NEXT DATA AUTHORITY, LOGICAL ACKNOWLEDGEMENT (only if required), ERROR Note – ROGER, NOT CURRENT DATA AUTHORITY, NOT AUTHORIZED NEXT DATA AUTHORITY and ERROR will close the uplink message. FANS 1/A.– ROGER, STANDBY, ERROR, NOT CURRENT DATA AUTHORITY. FANS 1/A aircraft do not have the capability to send UNABLE in response to an uplink message containing message elements with an “R” response attribute. For these aircraft, the flight crew may use alternative means to UNABLE the message. These alternative means will need to be taken into consideration to ensure proper technical and operational closure of the communication transaction. |
|
Y |
Response required. Valid responses: Any CPDLC downlink message, LOGICAL ACKNOWLEDGEMENT (only if required). |
|
N |
No response required unless logical acknowledgement is required. Valid Responses (only if LOGICAL ACKNOWLEDGEMENT is required). LOGICAL ACKNOWLEDGEMENT, NOT CURRENT DATA AUTHORITY, NOT AUTHORIZED NEXT DATA AUTHORITY, ERROR FANS 1/A.– “N” is defined as “no response is required,” but not used. Under some circumstances, an ERROR message will also close an uplink message. |
|
NE |
[Not defined in Doc 4444] FANS 1/A.– The WILCO, UNABLE, AFFIRM, NEGATIVE, ROGER, and STANDBY responses are not enabled (NE) for flight crew selection. An uplink message with a response attribute NE is considered to be closed even though a response may be required operationally. Under some circumstances, a downlink error message may be linked to an uplink message with a NE attribute. |
|
For Downlink Message |
|
|
Y |
Response required. Yes Valid responses. Any CPDLC uplink message, LOGICAL ACKNOWLEDGEMENT (only if required). |
|
N |
Response required. No, unless logical acknowledgement required. Valid responses (only if LOGICAL ACKNOWLEDGEMENT is required). LOGICAL ACKNOWLEDGEMENT, SERVICE UNAVAILABLE, FLIGHT PLAN NOT HELD, ERROR FANS 1/A.– Aircraft do not have the capability to receive technical responses to downlink message elements with an “N” response attribute (other than LACK or ERROR for ATN B1 aircraft). In some cases, the response attribute is different between FANS 1/A aircraft and Doc 4444. As an example, most emergency messages have an “N” response attribute for FANS 1/A whereas Doc 4444 defines a “Y” response attribute for them. As a consequence, for FANS 1/A aircraft, ATC will need to use alternative means to acknowledge to the flight crew that an emergency message has been received. |
TBL ENR 7.2-2 Route Uplink Message Elements (RTEU)
|
CPDLC Message Sets |
Operational Definition in PANS-ATM (Doc 4444) |
||||
|
FANS 1/A |
ATN B1 |
Response |
Message |
Message Element Intended Use |
Format for |
|
UM74 PROCEED DIRECT TO |
UM74 PROCEED DIRECT TO |
W/U |
RTEU-2 |
Instruction to proceed directly to the specified position. |
PROCEED DIRECT TO (position) |
|
UM75 WHEN ABLE PROCEED DIRECT TO (position) Note – This message element is equivalent to SUPU-5 plus RTEU-2 in Doc 4444. |
N/A |
W/U |
RTEU-2 |
Instruction to proceed directly to the specified position. |
PROCEED DIRECT TO (position) |
|
UM76 AT (time) PROCEED DIRECT TO (position) |
N/A |
W/U |
RTEU-3 |
Instruction to proceed, at the specified time, directly to the specified position. |
AT TIME (time) PROCEED DIRECT TO (position) |
|
UM77 AT (position) PROCEED DIRECT TO (position) |
N/A |
W/U |
RTEU-4 |
Instruction to proceed, at the specified position, directly to the next specified position. |
AT (position) PROCEED DIRECT TO (position) |
|
UM78 AT (altitude) PROCEED DIRECT TO (position) |
N/A |
W/U |
RTEU-5 |
Instruction to proceed upon reaching the specified level, directly to the specified position. |
AT (level single) PROCEED DIRECT TO (position) |
|
UM79 CLEARED TO (position) via (route clearance) |
UM79 CLEARED TO (position) via (route clearance) |
W/U |
RTEU-6 |
Instruction to proceed to the specified position via the specified route. |
CLEARED TO (position) VIA (departure data[O]) (en-route data) |
|
UM 80 CLEARED (route clearance) |
UM 80 CLEARED (route clearance) |
W/U |
RTEU-7 |
Instruction to proceed via the specified route. |
CLEARED (departure data[O]) (en-route data) (arrival approach data) |
|
UM83 AT (position) CLEARED (route clearance) |
N/A |
W/U |
RTEU-9 |
Instruction to proceed from the specified position via the specified route. |
AT (position) CLEARED (en-route data) (arrival approach data) |
|
UM85 EXPECT (route clearance) |
N/A |
R |
N/A |
Notification that a clearance to fly on the specified route may be issued. |
N/A |
|
UM86 AT (position) EXPECT (route clearance) |
N/A |
R |
N/A |
Notification that a clearance to fly on the specified route from the specified position may be issued. |
N/A |
|
UM87 EXPECT DIRECT TO (position) |
N/A |
R |
N/A |
Notification that a clearance to fly directly to the specified position may be issued. |
N/A |
|
UM88 AT (position) EXPECT DIRECT TO (position) |
N/A |
R |
N/A |
Notification that a clearance to fly directly from the first specified position to the next specified position may be issued. |
N/A |
|
UM89 AT (time) EXPECT DIRECT TO (position) |
N/A |
R |
N/A |
Notification that a clearance to fly directly to the specified position commencing at the specified time may be issued. |
N/A |
|
UM90 AT (altitude) EXPECT DIRECT TO (position) |
N/A |
R |
N/A |
Notification that a clearance to fly directly to the specified position commencing when the specified level is reached may be issued. |
N/A |
|
UM93 EXPECT FURTHER CLEARANCE AT (time) |
N/A |
R |
RTEU-13 |
Notification that an onwards clearance may be issued at the specified time. |
EXPECT FURTHER CLEARANCE AT TIME (time) |
|
UM99 EXPECT (procedure name) |
N/A |
R |
RTEU-14 |
Notification that a clearance may be issued for the aircraft to fly the specified procedure or clearance name. |
EXPECT (named instruction) |
|
UM137 CONFIRM ASSIGNED ROUTE |
N/A |
Y |
RTEU-15 |
Request to confirm the assigned route. |
CONFIRM ASSIGNED ROUTE |
|
UM147 REQUEST POSITION REPORT |
N/A |
Y |
RTEU-16 |
Request to make a position report. |
REQUEST POSITION REPORT |
TBL ENR 7.2-3 Route Downlink Message Elements (RTED)
|
CPDLC Message Sets |
Operational Definition in PANS-ATM (Doc 4444) |
||||
|
FANS 1/A |
ATN B1 |
Response |
Message Element Identifier |
Message Element Intended Use |
Format for Message Element Display |
|
DM22 REQUEST DIRECT TO (position) |
DM22 REQUEST DIRECT TO (position) |
Y |
RTED-1 |
Request for a direct clearance to the specified position. |
REQUEST DIRECT TO (position) |
|
DM23 REQUEST (procedure name) |
N/A |
Y |
RTED-2 |
Request for the specified route. |
REQUEST (named instruction) |
|
DM24 REQUEST (route clearance) |
N/A |
Y |
RTED-3 |
Request for the specified procedure or clearance name. |
REQUEST CLEARANCE (departure data[O]) (en-route data)(arrival approach data[O]) |
|
DM25 REQUEST CLEARANCE |
N/A |
Y |
RTED-4 |
Request for the specified clearance. |
REQUEST (clearance type) CLEARANCE |
|
DM26 REQUEST WEATHER DEVIATION TO (position) VIA (route clearance) |
N/A |
Y |
N/A |
Request for a weather deviation to the specified position via the specified route. |
N/A |
|
DM40 ASSIGNED ROUTE (route clearance) |
N/A |
Y |
RTED-9 |
Confirmation that the assigned route is the specified route. |
ASSIGNED ROUTE (departure data[O]) (en-route data) (arrival approach data[O]) |
|
DM40 ASSIGNED ROUTE (route clearance) |
N/A |
N |
RTED-9 |
Confirmation that the assigned route is the specified route. |
ASSIGNED ROUTE (departure data[O]) (en-route data) (arrival approach data[O]) |
|
DM48 POSITION REPORT (position report) |
N/A |
N |
RTED-5 |
Position report. |
POSITION REPORT (position report) |
|
DM51 WHEN CAN WE EXPECT BACK ON ROUTE |
N/A |
Y |
RTED-8 |
Request for the specified heading. |
WHEN CAN WE EXPECT BACK ON ROUTE |
|
DM70 REQUEST HEADING (degrees) |
N/A |
Y |
RTED-6 |
Request for the specified heading. |
REQUEST HEADING (degrees) |
|
DM71 REQUEST GROUND TRACK (degrees) |
N/A |
Y |
RTED-7 |
Request for the specified ground track. |
REQUEST GROUND TRACK (degrees) |
TBL ENR 7.2-4 Lateral Uplink Message Elements (LATU)
|
CPDLC Message Sets |
Operational Definition in PANS-ATM (Doc 4444) |
||||
|
FANS 1/A |
ATN B1 |
Response |
Message Element Identifier |
Message Element Intended Use |
Format for Message Element Display |
|
UM64 OFFSET (distance offset) (direction) OF ROUTE |
UM64 OFFSET (specified distance) (direction) OF ROUTE |
W/U |
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 |
|
UM65 AT (position) OFFSET (distance offset) (direction) OF ROUTE |
N/A |
W/U |
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 |
|
UM66 AT (time) OFFSET (distance offset) (direction) OF ROUTE |
N/A |
W/U |
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 |
|
UM67 PROCEED BACK ON ROUTE |
N/A |
W/U |
LATU-4 |
Instruction to rejoin the cleared route. |
REJOIN ROUTE |
|
UM68 REJOIN ROUTE BY (position) |
N/A |
W/U |
LATU-5 |
Instruction to rejoin the cleared route before passing the specified position. |
REJOIN ROUTE BEFORE PASSING (position) |
|
UM69 REJOIN ROUTE BY (time) |
N/A |
W/U |
LATU-6 |
Instruction to rejoin the cleared route before the specified time. |
REJOIN ROUTE BEFORE TIME (time) |
|
UM70 EXPECT BACK ON ROUTE BY (position) |
N/A |
R |
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) |
|
UM71 EXPECT BACK ON ROUTE BY (time) |
N/A |
R |
LATU-8 |
Notification that 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) |
|
UM72 RESUME OWN NAVIGATION |
UM72 RESUME OWN NAVIGATION |
W/U |
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 |
|
UM82 CLEARED TO DEVIATE UP TO (distance offset) (direction) OF ROUTE |
UM82 CLEARED TO DEVIATE UP TO (specified distance) (direction) OF ROUTE |
W/U |
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 |
|
UM98 IMMEDIATELY TURN (direction) HEADING (degrees) Note – This message element is equivalent to EMGU-2 plus LATU-11 in Doc 4444. |
N/A |
W/U |
LATU-11 |
Instruction to turn left or right as specified on to the specified heading. |
TURN (direction) HEADING (degrees) |
|
UM127 REPORT BACK ON ROUTE Note – R response attribute. |
N/A |
W/U |
LATU-18 |
Instruction to report when the aircraft is back on the cleared route. |
REPORT BACK ON ROUTE |
|
UM130 REPORT PASSING (position) Note– R response attribute. |
N/A |
W/U |
LATU-19 |
Instruction to report upon passing the specified position. |
REPORT PASSING (position) |
|
UM132 CONFIRM POSITION |
N/A |
NE |
N/A |
Instruction to report the present position. |
N/A |
|
UM138 CONFIRM TIME OVER REPORTED WAYPOINT |
N/A |
NE |
N/A |
Instruction to confirm the previously reported time over the last reported waypoint. |
N/A |
|
UM139 CONFIRM REPORTED WAYPOINT |
N/A |
NE |
N/A |
Instruction to confirm the identity of the previously reported waypoint. |
N/A |
|
UM140 CONFIRM NEXT WAYPOINT |
N/A |
NE |
N/A |
Instruction to confirm the identity of the next waypoint. |
N/A |
|
UM141 CONFIRM NEXT WAYPOINT ETA |
N/A |
NE |
N/A |
Instruction to confirm the previously reported estimated time at the next waypoint. |
N/A |
|
UM142 CONFIRM ENSUING WAYPOINT |
N/A |
NE |
N/A |
Instruction to confirm the identity of the next plus one waypoint. |
N/A |
|
UM145 CONFIRM HEADING |
N/A |
NE |
N/A |
Instruction to report the present heading. |
N/A |
|
UM146 REPORT GROUND TRACK |
N/A |
NE |
N/A |
Instruction to report the present ground track. |
N/A |
|
UM152 WHEN CAN YOU ACCEPT (specified distance) (direction) OFFSET |
N/A |
NE |
N/A |
Instruction to report the earliest time when the specified offset track can be accepted. |
N/A |
TBL ENR 7.2-5 Lateral Downlink Message Elements (LATD)
|
CPDLC Message Sets |
Operational Definition in PANS-ATM (Doc 4444) |
||||
|
FANS 1/A |
ATN B1 |
Response |
Message Element Identifier |
Message Element Intended Use |
Format for Message Element Display |
|
DM15 REQUEST OFFSET (specified distance) (direction) OF ROUTE |
N/A |
Y |
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 |
|
DM16 AT (position) REQUEST OFFSET (specified distance) (direction) OF ROUTE |
N/A |
Y |
N/A |
Request that a parallel track, offset from the cleared track by the specified distance in the specified direction, be approved from the specified position. |
N/A |
|
DM17 AT (time) REQUEST OFFSET (specified distance) (direction) OF ROUTE |
N/A |
Y |
N/A |
Request that a parallel track, offset from the cleared track by the specified distance in the specified direction, be approved from the specified time. |
N/A |
|
DM27 REQUEST WEATHER DEVIATION UP TO (specified distance) (direction) OF ROUTE |
DM27 REQUEST WEATHER DEVIATION UP TO (specified distance) (direction) OF ROUTE |
Y |
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 |
|
DM31 PASSING (position) |
N/A |
N |
LATD-8 |
Report indicating passing the specified position. |
PASSING (position) |
|
DM33 PRESENT POSITION (position) |
N/A |
N |
N/A |
Notification of the present position. |
N/A |
|
DM35 PRESENT HEADING (degrees) |
N/A |
N |
N/A |
Notification of the present heading in degrees. |
N/A |
|
DM36 PRESENT GROUND TRACK (degrees) |
N/A |
N |
N/A |
Notification of the present ground track in degrees. |
N/A |
|
DM41 BACK ON ROUTE |
N/A |
N |
LATD-4 |
Report indicating that the cleared route has been rejoined. |
BACK ON ROUTE |
|
DM42 NEXT WAYPOINT (position) |
N/A |
N |
N/A |
The next waypoint is the specified position. |
N/A |
|
DM43 NEXT WAYPOINT ETA (time) |
N/A |
N |
N/A |
The ETA at the next waypoint is as specified. |
N/A |
|
DM44 ENSUING WAYPOINT (position) |
N/A |
N |
N/A |
The next plus one waypoint is the specified position. |
N/A |
|
DM45 REPORTED WAYPOINT (position) |
N/A |
N |
N/A |
Clarification of previously reported waypoint passage. |
N/A |
|
DM46 REPORTED WAYPOINT (time) |
N/A |
N |
N/A |
Clarification of time over previously reported waypoint. |
N/A |
|
DM59 DIVERTING TO (position) VIA (route clearance) Note 1 – H alert attribute. Note 2 – N response attribute. |
N/A |
Y |
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]) |
|
DM60 OFFSETTING (distance offset) (direction) OF ROUTE Note 1 – H alert attribute. Note 2 – N response attribute. |
N/A |
Y |
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 |
|
DM80 DEVIATING (deviation Offset) (direction) OF ROUTE Note 1 – H alert attribute. Note 2 – N response attribute |
N/A |
Y |
LATD-7 |
Report indicating deviating specified distance or degrees in the specified direction from the cleared route. |
DEVIATING (specified Deviation) (direction) OF ROUTE |
|
DM67 WE CAN ACCEPT (direction) (distance offset) AT (time) |
N/A |
N |
N/A |
We can accept a parallel track offset the specified distance in the specified direction at the specified time. |
N/A |
|
DM67 WE CANNOT ACCEPT (direction) (distance offset) |
N/A |
N |
N/A |
We cannot accept a parallel track offset the specified distance in the specified direction. |
N/A |
|
DM67 WE CANNOT ACCEPT (altitude) |
N/A |
N |
N/A |
We cannot accept the specified altitude. |
N/A |
TBL ENR 7.2-6 Level Uplink Message Elements (LVLU)
|
CPDLC Message Sets |
Operational Definition in PANS-ATM (Doc 4444) |
||||
|
FANS 1/A |
ATN B1 |
Response |
Message Element Identifier |
Message Element Intended Use |
Format for Message Element Display |
|
UM6 EXPECT (altitude) |
N/A |
R |
N/A |
Notification that a level change instruction should be expected. |
N/A |
|
UM7 EXPECT CLIMB AT (time) |
N/A |
R |
LVLU-1 |
Notification that an instruction may be expected for the aircraft to commence climb at the specified time. |
EXPECT HIGHER AT TIME (time) |
|
UM8 EXPECT CLIMB AT (position) |
N/A |
R |
LVLU-2 |
Notification that an instruction may be expected for the aircraft to commence climb at the specified position. |
EXPECT HIGHER AT (position) |
|
UM9 EXPECT DESCENT AT (time) |
N/A |
R |
LVLU-3 |
Notification that an instruction may be expected for the aircraft to commence descent at the specified time. |
EXPECT LOWER AT TIME (time) |
|
UM10 EXPECT DESCENT AT (position) |
N/A |
R |
LVLU-4 |
Notification that an instruction may be expected for the aircraft to commence descent at the specified position. |
EXPECT LOWER AT (position) |
|
UM11 EXPECT CRUISE CLIMB AT (time) |
N/A |
R |
N/A |
Notification that an instruction should be expected for the aircraft to commence cruise climb at the specified time. Due to different interpretations between the various ATS units this, element should be avoided. |
N/A |
|
UM12 EXPECT CRUISE CLIMB AT (position) |
N/A |
R |
N/A |
Notification that an instruction should be expected for the aircraft to commence cruise climb at the specified position. Due to different interpretations between the various ATS units, this element should be avoided. |
N/A |
|
UM13 AT (time) EXPECT CLIMB TO (altitude) |
N/A |
R |
N/A |
Notification that an instruction should be expected for the aircraft to commence climb at the specified time to the specified level. |
N/A |
|
UM14 AT (position) EXPECT CLIMB TO (altitude) |
N/A |
R |
N/A |
Notification that an instruction should be expected for the aircraft to commence climb at the specified position to the specified level. |
N/A |
|
UM15 AT (time) EXPECT DESCENT TO (altitude) |
N/A |
R |
N/A |
Notification that an instruction should be expected for the aircraft to commence descent at the specified time to the specified level. |
N/A |
|
UM16 AT (position) EXPECT DESCENT TO (altitude) |
N/A |
R |
N/A |
Notification that an instruction should be expected for the aircraft to commence descent at the specified position to the specified level. |
N/A |
|
UM17 AT (time) EXPECT CRUISE CLIMB TO (altitude) |
N/A |
R |
N/A |
Notification that an instruction should be expected for the aircraft to commence cruise climb at the specified time to the specified level. Due to different interpretations between the various ATS units, this element should be avoided. |
N/A |
|
UM18 AT (position) EXPECT CRUISE CLIMB TO (altitude) |
N/A |
R |
N/A |
Notification that an instruction should be expected for the aircraft to commence cruise climb at the specified position to the specified level. Due to different interpretations between the various ATS units, this element should be avoided. |
N/A |
|
UM19 MAINTAIN (altitude) Note – Used for a single level. |
UM19 MAINTAIN (level) |
W/U |
LVLU-5 |
Instruction to maintain the specified level or vertical range. |
MAINTAIN (level) |
|
UM20 CLIMB TO AND MAINTAIN (altitude) Note – Used for a single level. |
UM20 CLIMB TO (level) |
W/U |
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) |
|
UM21 AT (time) CLIMB TO AND MAINTAIN (altitude) Note – A vertical range can not be provided. |
N/A |
W/U |
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) |
|
UM22 AT (position) CLIMB TO AND MAINTAIN (altitude) Note – A vertical range can not be provided. |
N/A |
W/U |
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) |
|
UM23 DESCEND TO AND MAINTAIN (altitude) Note – Used for a single level. |
N/A |
W/U |
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) |
|
UM24 AT (time) DESCEND TO AND MAINTAIN (altitude) Note – A vertical range can not be provided. |
N/A |
W/U |
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) |
|
UM25 AT (position) DESCEND TO AND MAINTAIN (altitude) Note –A vertical range cannot be provided. |
N/A |
W/U |
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) |
|
UM26 CLIMB TO REACH (altitude) BY (time) |
UM26 CLIMB TO REACH (level) BY (time) |
W/U |
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) |
|
UM27 CLIMB TO REACH (altitude) BY (position) |
UM27 CLIMB TO REACH (level) BY (position) |
W/U |
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) |
|
UM28 DESCEND TO REACH (altitude) BY (time) |
UM28 DESCEND TO REACH (level) BY (time) |
W/U |
LVLU-14 |
Instruction that a descent is to be completed such that the specified level is reached before the specified time. |
DESCEND TO REACH (level single) BEFORE TIME (time) |
|
UM29 DESCEND TO REACH (altitude) BY (position) |
UM29 DESCEND TO REACH (level) BY (position) |
W/U |
LVLU-15 |
Instruction that a descent is to be completed such that the specified level is reached before passing the specified position. |
DESCEND TO REACH (level single) BEFORE PASSING (position) |
|
UM30 MAINTAIN BLOCK (altitude) TO (altitude) Note – Used for a vertical range. |
UM19 MAINTAIN (level) |
W/U |
LVLU-5 |
Instruction to maintain the specified level or vertical range. |
MAINTAIN (level) |
|
UM31 CLIMB TO AND MAINTAIN BLOCK (altitude) TO (altitude) Note – Used for a vertical range. |
UM20 CLIMB TO (level) |
W/U |
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) |
|
UM32 DESCEND TO AND MAINTAIN BLOCK (altitude) TO (altitude) Note – Used for a vertical range. |
UM23 DESCEND TO (level) |
W/U |
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) |
|
UM33 CRUISE (altitude) |
N/A |
W/U |
N/A |
Instruction that authorizes a pilot to conduct flight at any altitude from the minimum altitude up to and including the altitude specified in the clearance. Further, it is approval for the pilot to proceed to and make an approach at the destination airport. Due to different interpretations between the various ATS units, this element should be avoided. |
N/A |
|
UM34 CRUISE CLIMB TO (altitude) |
N/A |
W/U |
N/A |
A cruise climb is to commence and continue until the specified level is reached. Due to different interpretations between the various ATS units, this element should be avoided. |
N/A |
|
UM35 CRUISE CLIMB ABOVE (altitude) |
N/A |
W/U |
N/A |
A cruise climb can commence once above the specified level. Due to different interpretations between the various ATS units, this element should be avoided. |
N/A |
|
UM36 EXPEDITE CLIMB TO (altitude) Note – This message element is equivalent to SUPU-3 plus LVLU-6 in Doc 4444. |
N/A |
W/U |
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) |
|
UM37 EXPEDITE DESCENT TO (altitude) Note – This message element is equivalent to SUPU-3 plus LVLU-9 in Doc 4444. |
N/A |
W/U |
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) |
|
UM38 IMMEDIATELY CLIMB TO (altitude) Used in combination with EMGU-2 plus LVLU-6 in Doc 4444 as an urgent instruction to immediately climb to the specified level. |
N/A |
W/U |
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) |
|
UM39 IMMEDIATELY DESCEND TO (altitude) Used in combination with EMGU-2 plus LVLU-9 in Doc 4444 as an urgent instruction to immediately descend to the specified level. |
N/A |
W/U |
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) |
|
UM40 IMMEDIATELY STOP CLIMB AT (altitude) |
N/A |
W/U |
N/A |
Urgent instruction to immediately stop a climb once the specified level is reached. |
N/A |
|
UM41 IMMEDIATELY STOP DESCENT AT (altitude) |
N/A |
W/U |
N/A |
Urgent instruction to immediately stop a descent once the specified level is reached. |
N/A |
|
UM128 REPORT LEAVING (altitude) Note – R response attribute. |
N/A |
W/U |
LVLU-23 |
Instruction to report upon leaving the specified level. |
REPORT LEAVING (level single) |
|
UM129 REPORT LEVEL (altitude) Note – R response attribute. |
N/A |
W/U |
LVLU-24 |
Instruction to report upon maintaining the specified level. |
REPORT MAINTAINING (level single) |
|
UM133 CONFIRM ALTITUDE |
N/A |
NE |
N/A |
Instruction to report the present level. |
N/A |
|
UM135 CONFIRM ASSIGNED ALTITUDE Note – NE response attribute. |
N/A |
Y |
LVLU-27 |
Request to confirm the assigned level. |
CONFIRM ASSIGNED LEVEL |
|
UM148 WHEN CAN YOU ACCEPT (altitude) Note – NE response attribute. |
UM148 WHEN CAN YOU ACCEPT (level) |
Y |
LVLU-30 |
Request for the earliest time or position when the specified level can be accepted. |
WHEN CAN YOU ACCEPT (level single) |
|
UM149 CAN YOU ACCEPT (altitude) AT (position) |
N/A |
A/N |
LVLU-31 |
Request to indicate whether or not the specified level can be accepted at the specified position. |
CAN YOU ACCEPT (level single) AT (position) |
|
UM150 CAN YOU ACCEPT (altitude) AT (time) |
N/A |
A/N |
LVLU-32 |
Request to indicate whether or not the specified level can be accepted at the specified time. |
CAN YOU ACCEPT (level single) AT TIME (time) |
|
UM171 CLIMB AT (vertical rate) MINIMUM |
UM171 CLIMB AT (vertical rate) MINIMUM |
W/U |
LVLU-18 |
Instruction to climb at the specified rate or greater. |
CLIMB AT (vertical rate) OR GREATER |
|
UM172 CLIMB AT (vertical rate) MAXIMUM |
UM172 CLIMB AT (vertical rate) MAXIMUM |
W/U |
LVLU-19 |
Instruction to climb at the specified rate or less. |
CLIMB AT (vertical rate) OR LESS |
|
UM173 DESCEND AT (vertical rate) MINIMUM |
UM173 DESCEND AT (vertical rate) MINIMUM |
W/U |
LVLU-20 |
Instruction to descend at the specified rate or greater. |
DESCEND AT (vertical rate) OR GREATER |
|
UM174 DESCEND AT (vertical rate) MAXIMUM |
UM174 DESCEND AT (vertical rate) MAXIMUM |
W/U |
LVLU-21 |
Instruction to descend at the specified rate or less. |
DESCEND AT (vertical rate) OR LESS |
|
UM175 REPORT REACHING (altitude) |
N/A |
R |
N/A |
Instruction to report when the aircraft has reached the specified altitude. |
N/A |
|
UM177 AT PILOTS DISCRETION |
N/A |
N |
N/A |
Note – To be interpreted as “Report reaching an assigned altitude.” |
N/A |
|
UM180 REACHING BLOCK (altitude) TO (altitude) Note – R response attribute. |
N/A |
W/U |
LVLU-26 |
Instruction to report upon reaching the specified vertical range. |
REPORT REACHING BLOCK (level single) TO (level single) |
TBL ENR 7.2-7 Level Downlink Message Elements (LVLD)
|
CPDLC Message Sets |
Operational Definition in PANS-ATM (Doc 4444) |
||||
|
FANS 1/A |
ATN B1 |
Response |
Message Element Identifier |
Message Element Intended Use |
Format for Message Element Display |
|
DM6 REQUEST (altitude) Note –Used for a single level. |
DM6 REQUEST (level) |
Y |
LVLD-1 |
Request to fly at the specified level or vertical range. |
REQUEST (level) |
|
DM7 REQUEST BLOCK (altitude) TO (altitude) Note – Used for a vertical range. |
DM6 REQUEST (level) |
Y |
LVLD-1 |
Request to fly at the specified level or vertical range. |
REQUEST (level) |
|
DM8 REQUEST CRUISE CLIMB TO (altitude) |
N/A |
Y |
N/A |
Request to cruise climb to the specified level. Due to different interpretations between the various ATS units, this element should be avoided. |
N/A |
|
DM9 REQUEST CLIMB TO (altitude) Note – Use of DM7 REQUEST BLOCK (altitude) TO (altitude) to request to climb at a vertical range. |
DM9 REQUEST CLIMB TO (level) |
Y |
LVLD-2 |
Request for a climb to the specified level or vertical range. |
REQUEST CLIMB TO (level) |
|
DM10 REQUEST DESCENT TO (altitude) Note – Use of DM7 REQUEST BLOCK (altitude) TO (altitude) to request to descend at a vertical range. |
DM10 REQUEST DESCENT TO (level) |
Y |
LVLD-3 |
Request for a descent to the specified level or vertical range. |
REQUEST CLIMB TO (level) |
|
DM11 AT (position) REQUEST CLIMB TO (altitude) Note – A vertical range cannot be requested. |
N/A |
Y |
LVLD-4 |
Request for a climb/descent to the specified level or vertical range to commence at the specified position. |
AT (position) REQUEST (level) |
|
DM12 AT (position) REQUEST DESCENT TO (altitude) Note – A vertical range cannot be requested. |
N/A |
Y |
LVLD-4 |
Request for a climb/descent to the specified level or vertical range to commence at the specified position. |
AT (position) REQUEST (level) |
|
DM13 AT TIME (time) REQUEST CLIMB TO (altitude) Note – A vertical range cannot be requested. |
N/A |
Y |
LVLD-5 |
Request for a climb/descent to the specified level or vertical range to commence at the specified time. |
AT TIME (time) REQUEST (level) |
|
DM14 AT TIME (time) REQUEST DESCENT TO (altitude) Note – A vertical range cannot be requested. |
N/A |
Y |
LVLD-5 |
Request for a climb/descent to the specified level or vertical range to commence at the specified time. |
AT TIME (time) REQUEST (level) |
|
DM28 LEAVING (altitude) |
N/A |
N |
LVLD-8 |
Report indicating leaving the specified level |
LEAVING (level single) |
|
DM29 CLIMBING TO (altitude) |
N/A |
N |
LVLD-13 |
Report indicating climbing to the specified level. |
CLIMBING TO (level single) |
|
DM30 DESCENDING TO (altitude) Note – N alert attribute. |
N/A |
N |
LVLD-14 |
Report indicating descending to the specified level. |
DESCENDING TO (level single) |
|
DM32 PRESENT ALTITUDE (altitude) |
DM32 PRESENT LEVEL (altitude) |
N |
LVLD-19 |
Notification of the present level. |
Present level (single level) |
|
DM37 LEVEL (altitude) |
N/A |
N |
LVLD-9 |
Report indicating that the specified level is being maintained. |
MAINTAINING (level single) |
|
DM38 ASSIGNED ALTITUDE (altitude) Note – Used for a single level |
DM38 ASSIGNED LEVEL (level) |
N |
LVLD-11 |
Confirmation that the assigned level or vertical range is the specified level or vertical range. |
ASSIGNED LEVEL (level) |
|
DM52 WHEN CAN WE EXPECT LOWER ALTITUDE |
N/A |
Y |
LVLD-6 |
Request for the earliest time or position that a descent can be expected. |
WHEN CAN WE EXPECT LOWER LEVEL |
|
DM53 WHEN CAN WE EXPECT HIGHER ALTITUDE |
N/A |
Y |
LVLD-7 |
Request for the earliest time or position that a climb can be expected. |
WHEN CAN WE EXPECT HIGHER LEVEL |
|
DM54 WHEN CAN WE EXPECT CRUISE CLIMB TO (altitude) |
N/A |
Y |
N/A |
Request for the earliest time at which a clearance to cruise climb to the specified level can be expected. |
N/A |
|
DM61 DESCENDING TO (altitude) Note – Urgent alert attribute. |
N/A |
N |
LVLD-14 |
Report indicating descending to the specified level. |
DESCENDING TO (level single) |
|
DM67 WE CAN ACCEPT (altitude) AT TIME (time) |
DM81 WE CAN ACCEPT (level) AT (time) Note – A vertical range may be provided. |
N |
LVLD-15 |
Indication that the specified level can be accepted at the specified time. |
WE CAN ACCEPT (level single) AT TIME (time) |
|
DM67 WE CANNOT ACCEPT (altitude) |
DM82 WE CANNOT ACCEPT (level) Note – A vertical range may be provided. |
N |
LVLD-17 |
Indication that the specified level cannot be accepted. |
WE CANNOT ACCEPT (level single) |
|
DM67 WHEN CAN WE EXPECT CLIMB TO (altitude) |
N/A |
N |
N/A |
Request for the earliest time at which a clearance to climb to the specified level can be expected. |
N/A |
|
DM 67 WHEN CAN WE EXPECT DESCENT TO (altitude) |
N/A |
N |
N/A |
Request for the earliest time at which a clearance to descend to the specified level can be expected. |
N/A |
|
DM72 REACHING (altitude) |
N/A |
N |
N/A |
Notification that the aircraft has reached the specified level. |
N/A |
|
DM75 AT PILOTS DISCRETION |
N/A |
N |
N/A |
Used in conjunction with another message to indicate that the pilot wishes to execute the request when the pilot is prepared to do so. |
N/A |
|
DM76 REACHING BLOCK (altitude) TO (altitude) |
N/A |
N |
LVLD-10 |
Report indicating reaching the specified vertical range. |
REACHING BLOCK (level single) TO (level single) |
|
DM77 ASSIGNED BLOCK (altitude) TO (altitude) Note – Used for a vertical range. |
DM38 ASSIGNED LEVEL (level) |
N |
LVLD-11 |
Confirmation that the assigned level or vertical range is the specified level or vertical range. |
ASSIGNED LEVEL (level) |
TBL ENR 7.2-8 Crossing Constraints Uplink Message Elements (CSTU)
|
CPDLC Message Sets |
Operational Definition in PANS-ATM (Doc 4444) |
||||
|
FANS 1/A |
ATN B1 |
Response |
Message Element Identifier |
Message Element Intended Use |
Format for Message Element Display |
|
UM42 EXPECT TO CROSS (position) AT (altitude) |
N/A |
R |
N/A |
Notification that a level change instruction should be expected which will require the specified position to be crossed at the specified level. |
N/A |
|
UM43 EXPECT TO CROSS (position) AT OR ABOVE (altitude) |
N/A |
R |
N/A |
Notification that a level change instruction should be expected which will require the specified position to be crossed at or above the specified level. |
N/A |
|
UM44 EXPECT TO CROSS (position) AT OR BELOW (altitude) |
N/A |
R |
N/A |
Notification that a level change instruction should be expected which will require the specified position to be crossed at or below the specified level. |
N/A |
|
UM45 EXPECT TO CROSS (position) AT AND MAINTAIN (altitude) |
N/A |
R |
N/A |
Notification that a level change instruction should be expected which will require the specified position to be crossed at the specified level which is to be maintained subsequently. |
N/A |
|
UM46 CROSS (position) AT (altitude) Note – Used for a single level. |
UM46 CROSS (position) AT (level) |
W/U |
CSTU-1 |
Instruction that the specified position is to be crossed at the specified level or within the specified vertical range. |
CROSS (position) AT (level) |
|
UM47 CROSS (position) AT OR ABOVE (altitude) |
UM47 CROSS (position) AT OR ABOVE (level) |
W/U |
CSTU-2 |
Instruction that the specified position is to be crossed at or above the specified level. |
CROSS (position) AT OR ABOVE (level single) |
|
UM48 CROSS (position) AT OR BELOW (altitude) |
UM48 CROSS (position) AT OR BELOW (altitude) |
W/U |
CSTU-3 |
Instruction that the specified position is to be crossed at or below the specified level. |
CROSS (position) AT OR BELOW (level single) |
|
UM49 CROSS (position) AT AND MAINTAIN (altitude) Note 1. – A vertical range cannot be provided. Note 2. – This message element is equivalent to CSTU-1 plus LVLU-5 in Doc 4444. |
N/A |
W/U |
CSTU-1 |
Instruction that the specified position is to be crossed at the specified level or within the specified vertical range. |
CROSS (position) AT (level) |
|
UM50 CROSS (position) BETWEEN (altitude) AND (altitude) Note – Used for a vertical range. |
UM46 CROSS (position) AT (level) |
W/U |
CSTU-1 |
Instruction that the specified position is to be crossed at the specified level or within the specified vertical range. |
CROSS (position) AT (level) |
|
UM51 CROSS (position) AT (time) |
UM51 CROSS (position) AT (time) |
W/U |
CSTU-4 |
Instruction that the specified position is to be crossed at the specified time. |
CROSS (position) AT TIME (time) |
|
UM52 CROSS (position) AT OR BEFORE (time) |
UM52 CROSS (position) AT OR BEFORE (time) |
W/U |
CSTU-5 |
Instruction that the specified position is to be crossed before the specified time. |
CROSS (position) BEFORE TIME (time) |
|
UM53 CROSS (position) AT OR AFTER (time) |
UM53 CROSS (position) AT OR AFTER (time) |
W/U |
CSTU-6 |
Instruction that the specified position is to be crossed after the specified time. |
CROSS (position) AFTER TIME (time) |
|
UM54 CROSS (position) BETWEEN (time) AND (time) |
UM54 CROSS (position) BETWEEN (time) AND (time) |
W/U |
CSTU-7 |
Instruction that the specified position is to be crossed between the specified times. |
CROSS (position) BETWEEN TIME (time) AND TIME (time) |
|
UM55 CROSS (position) AT (speed) |
UM55 CROSS (position) AT (speed) |
W/U |
CSTU-8 |
Instruction that the specified position is to be crossed at the specified speed. |
CROSS (position) AT (speed) |
|
UM56 CROSS (position) AT OR LESS THAN (speed) |
N/A |
W/U |
CSTU-9 |
Instruction that the specified position is to be crossed at or less than the specified speed. |
CROSS (position) AT (speed) OR LESS |
|
UM57 CROSS (position) AT OR GREATER THAN (speed) |
N/A |
W/U |
CSTU-10 |
Instruction that the specified position is to be crossed at or greater than the specified speed. |
CROSS (position) AT (speed) OR GREATER |
|
UM58 CROSS (position) AT (time) AT (altitude) Note – A vertical range cannot be provided. |
N/A |
W/U |
CSTU-11 |
Instruction that the specified position is to be crossed at the specified time and at the level or within the vertical range as specified. |
CROSS (position) AT TIME (time) AT (level) |
|
UM59 CROSS (position) AT OR BEFORE (time) AT (altitude) Note – A vertical range cannot be provided. |
N/A |
W/U |
CSTU-12 |
Instruction that the specified position is to be crossed before the specified time and at the level or within the vertical range as specified. |
CROSS (position) BEFORE TIME (time) AT (level) |
|
UM60 CROSS (position) AT OR AFTER (time) AT (altitude) Note – A vertical range cannot be provided. |
N/A |
W/U |
CSTU-13 |
Instruction that the specified position is to be crossed after the specified time and at the level or within the vertical range as specified. |
CROSS (position) AFTER TIME (time) AT (level) |
|
UM61 CROSS (position) AT AND MAINTAIN (altitude) AT (speed) Note 1. – A vertical range cannot be provided. Note 2. – This message element is equivalent to CSTU-14 plus LVLU-5 in Doc 4444. |
UM61 CROSS (position) AT AND MAINTAIN (level) AT (speed) |
W/U |
CSTU-14 |
Instruction that the specified position is to be crossed at the level or within the vertical range, as specified, and at the specified speed. |
CROSS (position) AT (level) AT (speed) |
|
UM62 AT (time) CROSS (position) AT AND MAINTAIN (altitude) |
N/A |
W/U |
NA |
Instruction that at the specified time the specified position is to be crossed at the specified level and the level is to be maintained. |
N/A |
|
UM63 AT (time) CROSS (position) AT AND MAINTAIN (altitude) AT (speed) Note 1. – A vertical range cannot be provided. Note 2. – This message element is equivalent to CSTU-15 plus LVLU-5 in Doc 4444. |
N/A |
W/U |
CSTU-15 |
Instruction that the specified position is to be crossed at the specified time at the level or within the vertical range, as specified, and at the specified speed. |
CROSS (position) AT TIME (time) AT (level) AT (speed) |
TBL ENR 7.2-9 Speed Uplink Message Elements (SPDU)
|
CPDLC Message Sets |
Operational Definition in PANS-ATM (Doc 4444) |
||||
|
FANS 1/A |
ATN B1 |
Response |
Message Element Identifier |
Message Element Intended Use |
Format for Message Element Display |
|
UM100 AT (time) EXPECT (speed) |
N/A |
R |
SPDU-1 |
Notification that a speed instruction may be issued to take effect at the specified time. |
EXPECT SPEED CHANGE AT TIME (time) |
|
UM101 AT (position) EXPECT (speed) |
N/A |
R |
SPDU- 2 |
Notification that a speed instruction may be issued to take effect at the specified position. |
EXPECT SPEED CHANGE AT (position) |
|
UM102 AT (altitude) EXPECT (speed) |
N/A |
R |
SPDU-3 |
Notification that a speed instruction may be issued to take effect at the specified level. |
EXPECT SPEED CHANGE AT (level single) |
|
UM103 AT (time) EXPECT (speed) TO (speed) |
N/A |
R |
N/A |
Notification that a speed range instruction may be issued to be effective at the specified time. |
N/A |
|
UM104 AT (position) EXPECT (speed) TO (speed) |
N/A |
R |
N/A |
Notification that a speed range instruction may be issued to be effective at the specified position. |
N/A |
|
UM105 AT (altitude) EXPECT (speed) TO (speed) |
N/A |
R |
N/A |
Notification that a speed range instruction may be issued to be effective at the specified level. |
N/A |
|
UM106 MAINTAIN (speed) |
UM106 MAINTAIN (speed) |
W/U |
SPDU-4 |
Instruction to maintain the specified speed. |
MAINTAIN (speed) |
|
UM107 MAINTAIN PRESENT SPEED |
UM107 MAINTAIN PRESENT SPEED |
W/U |
SPDU-5 |
Instruction to maintain the present speed. |
MAINTAIN PRESENT SPEED |
|
UM108 MAINTAIN (speed) OR GREATER |
UM108 MAINTAIN (speed) OR GREATER |
W/U |
SPDU-6 |
Instruction to maintain the specified speed or greater. |
MAINTAIN (speed) OR GREATER |
|
UM109 MAINTAIN (speed) OR LESS |
UM109 MAINTAIN (speed) OR LESS |
W/U |
SPDU-7 |
Instruction to maintain the specified speed or less. |
MAINTAIN (speed) OR LESS |
|
UM110 MAINTAIN (speed) TO (speed) |
N/A |
W/U |
SPDU-8 |
Instruction to maintain the specified speed range. |
MAINTAIN (speed) TO (speed) |
|
UM111 INCREASE SPEED TO (speed) |
N/A |
W/U |
SPDU-9 |
Instruction that the present speed is to be increased to the specified speed and maintained until further advised. |
INCREASE SPEED TO (speed) |
|
UM112 INCREASE SPEED TO (speed) OR GREATER |
N/A |
W/U |
SPDU-10 |
Instruction that the present speed is to be increased to the specified speed or greater, and maintained at or above the specified speed until further advised. |
INCREASE SPEED TO (speed) OR GREATER |
|
UM113 REDUCE SPEED TO (speed) |
N/A |
W/U |
SPDU-11 |
Instruction that the present speed is to be reduced to the specified speed and maintained until further advised. |
REDUCE SPEED TO (speed) |
|
UM114 REDUCE SPEED TO (speed) OR LESS |
N/A |
W/U |
SPDU-12 |
Instruction that the present speed is to be reduced to the specified speed or less, and maintained at or below the specified speed until further advised. |
REDUCE SPEED TO (speed) OR LESS |
|
UM115 DO NOT EXCEED (speed) |
N/A |
W/U |
N/A |
The specified speed is not to be exceeded. |
N/A |
|
UM116 RESUME NORMAL SPEED |
UM116 RESUME NORMAL SPEED |
W/U |
SPDU-13 |
Instruction to resume a normal speed. The aircraft no longer needs to comply with a previously issued speed restriction. |
RESUME NORMAL SPEED |
|
UM134 CONFIRM SPEED Note – NE response attribute. |
N/A |
Y |
SPDU-15 |
Request to report the speed defined by the speed type(s). |
REPORT (speed types) SPEED |
|
UM136 CONFIRM ASSIGNED SPEED Note – NE response attribute. |
N/A |
Y |
SPDU-16 |
Request to confirm the assigned speed. |
CONFIRM ASSIGNED SPEED |
|
UM151 WHEN CAN YOU ACCEPT (speed) Note – NE response attribute. |
N/A |
Y |
SPDU-17 |
Request for the earliest time or position when the specified speed can be accepted. |
WHEN CAN YOU ACCEPT (speed) |
TBL ENR 7.2-10 Speed Downlink Message Elements (SPDD)
|
CPDLC Message Sets |
Operational Definition in PANS-ATM (Doc 4444) |
||||
|
FANS 1/A |
ATN B1 |
Response |
Message Element Identifier |
Message Element Intended Use |
Format for Message Element Display |
|
DM18 REQUEST (speed) |
DM18 REQUEST (speed) |
Y |
SPDD-1 |
Request for the specified speed. |
REQUEST (speed) |
|
DM19 REQUEST (speed) TO (speed) |
N/A |
Y |
N/A |
Request to fly within the specified speed range. |
N/A |
|
DM34 PRESENT SPEED (speed) |
N/A |
N |
SPDD-3 |
Report indicating the speed defined by the specified speed types is the specified speed. |
(speed types) SPEED (speed) |
|
DM39 ASSIGNED SPEED (speed) |
N/A |
N |
SPDD-4 |
Confirmation that the assigned speed is the specified speed. |
ASSIGNED SPEED (speed) |
|
DM49 WHEN CAN WE EXPECT (speed) |
N/A |
Y |
SPDD-2 |
Request for the earliest time or position that the specified speed can be expected. |
WHEN CAN WE EXPECT (speed) |
|
DM50 WHEN CAN WE EXPECT (speed) TO (speed) |
N/A |
Y |
N/A |
Request for the earliest time at which a clearance to a speed within the specified range can be expected. |
N/A |
|
DM67 WE CAN ACCEPT (speed) AT TIME (time) |
N/A |
N |
SPDD-5 |
Indication that the specified speed can be accepted at the specified time. |
WE CAN ACCEPT (speed) AT TIME (time) |
|
DM67 WE CANNOT ACCEPT (speed) |
N/A |
N |
SPDD-6 |
Indication that the specified speed cannot be accepted. |
WE CANNOT ACCEPT (speed) |
TBL ENR 7.2-11 Air Traffic Advisory Uplink Message Elements (ADVU)
|
CPDLC Message Sets |
Operational Definition in PANS-ATM (Doc 4444) |
||||
|
FANS 1/A |
ATN B1 |
Response |
Message Element Identifier |
Message Element Intended Use |
Format for Message Element Display |
|
UM123 SQUAWK (beacon code) |
UM123 SQUAWK (code) |
W/U |
ADVU-9 |
Instruction to select the specified SSR code. |
SQUAWK (SSR code) |
|
UM124 STOP SQUAWK |
N/A |
W/U |
ADVU-10 |
Instruction to disable SSR transponder responses. |
STOP SQUAWK |
|
UM125 SQUAWK ALTITUDE |
N/A |
W/U |
ADVU-12 |
Instruction to include level information in the SSR transponder responses. |
SQUAWK MODE C |
|
UM126 STOP ALTITUDE SQUAWK |
N/A |
W/U |
ADVU-13 |
Instruction to stop including level information in the SSR transponder responses. |
STOP SQUAWK MODE C |
|
UM144 CONFIRM SQUAWK Note – NE response attribute. |
N/A |
Y |
ADVU-14 |
Request to confirm the Selected SSR code. |
CONFIRM SQUAWK CODE |
|
UM153 ALTIMETER (altimeter) Note 1. – The facility designation and the time of measurement cannot be provided. Note 2. – the FAA concatenates UM169 '(facility designation) ALTIMETER (altimeter setting)' |
UM213 (facility designation) ALTIMETER (altimeter) Note –The facility designation is always provided and the time of measurement cannot be provided. |
R |
ADVU-1 |
Advisory providing the specified altimeter setting for the specified facility. |
(facility designation) ALTIMETER (altimeter setting) |
|
UM154 RADAR SERVICES TERMINATED |
N/A |
R |
ADVU-2 |
Advisory that the ATS surveillance service is terminated. |
SURVEILLANCE SERVICE TERMINATED |
|
UM155 RADAR CONTACT (position) Note – The provision of the position is required. |
N/A |
R |
ADVU-3 |
Advisory that ATS surveillance service has been established. A position may be specified position. |
IDENTIFIED (position[O]) |
|
UM156 RADAR CONTACT LOST |
N/A |
R |
ADVU-4 |
Advisory that ATS surveillance contact has been lost. |
IDENTIFICATION LOST |
|
UM158 ATIS (atis code) Note – The airport is not provided. |
N/A |
R |
ADVU-5 |
ATS advisory that the current ATIS code is as specified. |
ATIS (ATIS code) |
|
UM163 (ICAO facility designation) (tp4Table) |
N/A |
N/E |
N/A |
Notification to the pilot of an ATSU identifier. |
N/A |
|
UM168 DISREGARD |
N/A |
N/E |
N/A |
The indicated communication should be ignored. The previously sent uplink CPDLC message shall be ignored. DISREGARD should not refer to a clearance or instruction. If DISREGARD is used, another element shall be added to clarify which message is to be disregarded. |
N/A |
|
UM179 SQUAWK IDENT |
UM179 SQUAWK IDENT |
W/U |
ADVU-15 |
Instruction that the ‘ident’ function on the SSR transponder is to be actuated. |
SQUAWK IDENT |
|
UM182 CONFIRM ATIS CODE |
N/A |
N/E |
N/A |
Instruction to report the identification code of the last ATIS received. |
N/A |
TBL ENR 7.2-12 Air Traffic Advisory Downlink Message Elements (ADVD)
|
CPDLC Message Sets |
Operational Definition in PANS-ATM (Doc 4444) |
||||
|
FANS 1/A |
ATN B1 |
Response |
Message Element Identifier |
Message Element Intended Use |
Format for Message Element Display |
|
DM47 SQUAWKING (code) |
N/A |
N |
ADVD-1 |
Report indicating that the aircraft is squawking the specified SSR code. |
SQUAWKING (SSR code) |
|
DM79 ATIS (ATIS code) |
N/A |
N |
N/A |
The code of the latest ATIS received is as specified. |
N/A |
TBL ENR 7.2-13 Voice Communications Uplink Message Elements (COMU)
|
CPDLC Message Sets |
Operational Definition in PANS-ATM (Doc 4444) |
||||
|
FANS 1/A |
ATN B1 |
Response |
Message Element Identifier |
Message Element Intended Use |
Format for Message Element Display |
|
UM117 CONTACT (ICAO unit name) (frequency) |
UM117 CONTACT (ICAO unit name) (frequency) |
W/U |
COMU-1 |
Instruction to establish voice contact with the specified ATS unit on the specified frequency. |
CONTACT (unit name) (frequency) |
|
UM118 AT (position) CONTACT (ICAO unit name) (frequency) |
N/A |
W/U |
COMU-2 |
Instruction at the specified position to establish voice contact with the specified ATS unit on the specified frequency. |
AT (position) CONTACT (unit name) (frequency) |
|
UM119 AT (time) CONTACT (ICAO unit name) (frequency) |
N/A |
W/U |
COMU-3 |
Instruction at the specified time to establish voice contact with the specified ATS unit on the specified frequency. |
AT TIME (time) CONTACT (unit name) (frequency) |
|
UM120 MONITOR (ICAO unit name) (frequency) |
UM120 MONITOR (ICAO unit name) (frequency) |
W/U |
COMU-5 |
Instruction to monitor the specified ATS unit on the specified frequency. The flight crew is not required to establish voice contact on the frequency. |
MONITOR (unit name) (frequency) |
|
UM121 AT (position) MONITOR (ICAO unit name) (frequency) |
N/A |
W/U |
COMU-6 |
Instruction at the specified position to monitor the specified ATS unit on the specified frequency. The flight crew is not required to establish voice contact on the frequency. |
AT (position) MONITOR (unit name) (frequency) |
|
UM122 AT (time) MONITOR (ICAO unit name) (frequency) |
N/A |
W/U |
COMU-7 |
Instruction at the specified time to monitor the specified ATS unit on the specified frequency. The flight crew is not required to establish voice contact on the frequency. |
AT TIME (time) MONITOR (unit name) (frequency) |
|
UM157 CHECK STUCK MICROPHONE (frequency) Note – R response attribute. |
UM157 CHECK STUCK MICROPHONE (frequency) |
N |
COMU-8 |
Instruction to check the microphone due to detection of a continuous transmission on the specified frequency. |
CHECK STUCK MICROPHONE (frequency) |
TBL ENR 7.2-14 Voice Communications Downlink Message Elements (COMD)
|
CPDLC Message Sets |
Operational Definition in PANS-ATM (Doc 4444) |
||||
|
FANS 1/A |
ATN B1 |
Response |
Message Element Identifier |
Message Element Intended Use |
Format for Message Element Display |
|
DM20 REQUEST VOICE CONTACT Note – Used when a frequency is not required. |
N/A |
Y |
COMD-1 |
Request for voice contact on the specified frequency. |
REQUEST VOICE CONTACT (frequency) |
|
DM21 REQUEST VOICE CONTACT (frequency) Note – Used when a frequency is required. |
N/A |
Y |
COMD-1 |
Request for voice contact on the specified frequency. |
REQUEST VOICE CONTACT (frequency) |
TBL ENR 7.2-15 Emergency/Urgency Uplink Message Elements (EMGU)
|
CPDLC Message Sets |
Operational Definition in PANS-ATM (Doc 4444) |
||||
|
FANS 1/A |
ATN B1 |
Response |
Message Element Identifier |
Message Element Intended Use |
Format for Message Element Display |
|
UM131 REPORT REMAINING FUEL AND SOULS ON BOARD Note – NE response attribute. |
N/A |
Y |
EMGU-1 |
Request to provide the fuel Remaining (time) and the number of persons on board. |
REPORT ENDURANCE AND PERSONS ON BOARD |
TBL ENR 7.2-16 Emergency/Urgency Downlink Message Elements (EMGD)
|
CPDLC Message Sets |
Operational Definition in PANS-ATM (Doc 4444) |
||||
|
FANS 1/A |
ATN B1 |
Response |
Message Element Identifier |
Message Element Intended Use |
Format for Message Element Display |
|
DM55 PAN PAN PAN Note – N response attribute. |
N/A |
Y |
EMGD-1 |
Indication of an urgent situation. |
PAN PAN PAN |
|
DM56 MAYDAY MAYDAY MAYDAY Note – N response attribute. |
N/A |
Y |
EMGD-2 |
Indication of an emergency situation. |
MAYDAY MAYDAY MAYDAY |
|
DM57 (remaining fuel) OF FUEL REMAINING AND (remaining souls) SOULS ON BOARD Note – N response attribute. |
N/A |
Y |
EMGD-3 |
Report indicating fuel Remaining (time) and number of persons on board. |
(remaining fuel) ENDURANCE AND (persons on board) PERSONS ON BOARD |
|
DM58 CANCEL EMERGENCY Note – N response attribute. |
N/A |
Y |
EMGD-4 |
Indication that the emergency situation is cancelled. |
CANCEL EMERGENCY |
TBL ENR 7.2-17 Standard Response Uplink Message Elements (RSPU)
|
CPDLC Message Sets |
Operational Definition in PANS-ATM (Doc 4444) |
||||
|
FANS 1/A |
ATN B1 |
Response |
Message Element Identifier |
Message Element Intended Use |
Format for Message Element Display |
|
UM0 UNABLE |
UM0 UNABLE |
N |
RSPU-1 |
Indication that the message cannot be complied with. |
UNABLE |
|
UM1 STANDBY |
UM1 STANDBY |
N |
RSPU-2 |
Indication that the message will be responded to shortly. |
STANDBY |
|
UM2 REQUEST DEFERRED |
N/A |
N |
RSPU-3 |
Indication that a long-term delay in response can be expected. |
REQUEST DEFERRED |
|
UM3 ROGER |
UM3 ROGER |
N |
RSPU-4 |
Indication that the message is received. |
ROGER |
|
UM4 AFFIRM |
UM4 AFFIRM |
N |
RSPU-5 |
Indication that ATC is responding positively to the message. |
AFFIRM |
|
UM5 NEGATIVE |
UM5 NEGATIVE |
N |
RSPU-6 |
Indication that ATC is responding negatively to the message. |
NEGATIVE |
|
UM143 CONFIRM REQUEST |
N/A |
N |
RSPU-8 |
Request to confirm the referenced request since the initial request was not understood. The request should be clarified and resubmitted. |
CONFIRM REQUEST |
TBL ENR 7.2-18 Standard Response Downlink Message Elements (RSPD)
|
CPDLC Message Sets |
Operational Definition in PANS-ATM (Doc 4444) |
||||
|
FANS 1/A |
ATN B1 |
Response |
Message Element Identifier |
Message Element Intended Use |
Format for Message Element Display |
|
DM0 WILCO |
DM0 WILCO |
N |
RSPD-1 |
Indication that the instruction is understood and will be complied with. |
WILCO |
|
DM1 UNABLE |
DM1 UNABLE |
N |
RSPD-2 |
Indication that the instruction cannot be complied with. |
UNABLE |
|
DM2 STANDBY |
DM2 STANDBY |
N |
RSPD-3 |
Indication that the message will be responded to shortly. |
STANDBY |
|
DM3 ROGER Note – ROGER is the only correct response to an uplink free text message. |
DM3 ROGER |
N |
RSPD-4 |
Indication that the message is received. |
ROGER |
|
DM4 AFFIRM |
DM4 AFFIRM |
N |
RSPD-5 |
Indication of a positive response to a message. |
AFFIRM |
|
DM5 NEGATIVE |
DM5 NEGATIVE |
N |
RSPD-6 |
Indication of a negative response to a message. |
NEGATIVE |
TBL ENR 7.2-19 Supplemental Uplink Message Elements (SUPU)
|
CPDLC Message Sets |
Operational Definition in PANS-ATM (Doc 4444) |
||||
|
FANS 1/A |
ATN B1 |
Response |
Message Element Identifier |
Message Element Intended Use |
Format for Message Element Display |
|
UM164 WHEN READY |
N/A |
NE |
SUPU-1 |
Indication that the associated instruction is to be executed when the flight crew is ready. |
WHEN READY |
|
UM165 THEN |
N/A |
NE |
N/A |
Used to link two messages, indicating the proper order of execution of clearances/ instructions. |
N/A |
|
UM166 DUE TO TRAFFIC |
N/A |
NE |
SUPU-2 |
Indication that the associated message is issued due to the specified reason. |
DUE TO (specified reason uplink) |
|
UM167 DUE TO AIRSPACE RESTRICTION |
N/A |
NE |
SUPU-2 |
Indication that the associated message is issued due to the specified reason. |
DUE TO (specified reason uplink) |
|
UM168 DISREGARD |
N/A |
R |
N/A |
The indicated communication should be ignored. The previously sent uplink CPDLC message shall be ignored. DISREGARD should not refer to a clearance or instruction. If DISREGARD is used, another element shall be added to clarify which message is to be disregarded. |
N/A |
|
UM176 MAINTAIN OWN SEPARATION AND VMC |
N/A |
W/U |
N/A |
Notification that the pilot is responsible for maintaining separation from other traffic and is also responsible for maintaining Visual Meteorological Conditions. |
N/A |
TBL ENR 7.2-20 Supplemental Downlink Message Elements (SUPD)
|
CPDLC Message Sets |
Operational Definition in PANS-ATM (Doc 4444) |
||||
|
FANS 1/A |
ATN B1 |
Response |
Message Element Identifier |
Message Element Intended Use |
Format for Message Element Display |
|
DM65 DUE TO WEATHER |
DM65 DUE TO WEATHER |
N |
SUPD-1 |
Indication that the associated message is issued due to specified reason. |
DUE TO (specified reason downlink) |
|
DM66 DUE TO AIRCRAFT PERFORMANCE |
DM66 DUE TO AIRCRAFT PERFORMANCE |
N |
SUPD-1 |
Indication that the associated message is issued due to specified reason. |
DUE TO (specified reason downlink) |
TBL ENR 7.2-21 Free Text Uplink Message Elements
|
CPDLC Message Sets |
Operational Definition in PANS-ATM (Doc 4444) |
||||
|
FANS 1/A |
ATN B1 |
Response |
Message Element Identifier |
Message Element Intended Use |
Format for Message Element Display |
|
UM169 (free text) |
N/A |
R |
N/A |
A message or part of a message that does not conform to any standard message element in the PANSATM (Doc 4444). |
N/A |
|
UM169 (free text) CPDLC NOT IN USE UNTIL FURTHER NOTIFICATION |
N/A |
R |
N/A |
See Note |
N/A |
|
UM169 (free text) "[facility designation]" (for Altimeter reporting Station) |
N/A |
R |
N/A |
See Note |
N/A |
|
(free text) "[facility designation] ALTIMETER MORE THAN ONE HOUR" OLD |
N/A |
R |
N/A |
See Note |
N/A |
|
UM169 (free text) DUE TO WEATHER |
N/A |
R |
N/A |
See Note |
N/A |
|
UM169 (free text) REST OF ROUTE UNCHANGED |
N/A |
R |
N/A |
See Note |
N/A |
|
(free text) TRAFFIC FLOW MANAGEMENT REROUTE |
N/A |
R |
N/A |
See Note |
N/A |
TBL ENR 7.2-22 Free Text Downlink Message Elements
|
CPDLC Message Sets |
Operational Definition in PANS-ATM (Doc 4444) |
||||
|
FANS 1/A |
ATN B1 |
Response |
Message Element Identifier |
Message Element Intended Use |
Format for Message Element Display |
|
DM67 (free text) Note – Medium (M) alert attribute. |
N/A |
Y |
N/A |
N/A |
N/A |
|
DM68 (free text) Note 1. – Urgency or Medium (M) alert attribute. Note 2. – Selecting any of the emergency message elements will result in this message element being enabled for the flight crew to include in the emergency message at their discretion. |
N/A |
Y |
N/A |
N/A |
N/A |
TBL ENR 7.2-23 System Management Uplink Message Elements (SYSU)
|
CPDLC Message Sets |
Operational Definition in PANS-ATM (Doc 4444) |
||||
|
FANS 1/A |
ATN B1 |
Response |
Message Element Identifier |
Message Element Intended Use |
Format for Message Element Display |
|
UM159 ERROR (error information) |
UM159 ERROR (error information) |
N |
SYSU-1 |
System-generated notification of an error. |
ERROR (error information) |
|
UM160 NEXT DATA AUTHORITY (ICAO facility designation) Note – The facility designation is required. |
UM160 NEXT DATA AUTHORITY (facility) Note – Facility parameter can specify a facility designation or no facility. |
N |
SYSU-2 |
System-generated notification of the next data authority or the cancellation thereof. |
NEXT DATA AUTHORITY (facility designation[O]) |
|
UM161 END SERVICE |
N/A |
NE |
N/A |
Notification to the avionics that the data link connection with the current data authority is being terminated. |
N/A |
|
UM162 SERVICE UNAVAILABLE |
N/A |
NE |
N/A |
Notification that the ground system does not support this message. |
N/A |
TBL ENR 7.2-24 System Management Downlink Message Elements (SYSD)
|
CPDLC Message Sets |
Operational Definition in PANS-ATM (Doc 4444) |
||||
|
FANS 1/A |
ATN B1 |
Response |
Message Element Identifier |
Message Element Intended Use |
Format for Message Element Display |
|
DM62 ERROR (error information) |
DM62 ERROR (error information) |
N |
SYSD-1 |
System-generated notification of an error. |
ERROR (error information) |
|
DM63 NOT CURRENT DATA AUTHORITY |
DM63 NOT CURRENT DATA AUTHORITY |
N |
SYSD-3 |
System-generated rejection of any CPDLC message sent from a ground facility that is not the current data authority. |
NOT CURRENT DATA AUTHORITY |
|
DM64 (ICAO facility designation) Note – Use by FANS 1/A aircraft in B1 environments. |
N/A |
N |
N/A |
System-generated notification that the ground system is not designated as the next data authority (NDA), indicating the identity of the current data authority (CDA). Identity of the NDA, if any, is also reported. |
N/A |
TBL ENR 7.2-25 Additional Uplink Messages
|
CPDLC Message Sets |
Operational Definition in PANS-ATM (Doc 4444) |
||||
|
FANS 1/A |
ATN B1 |
Response |
Message Element Identifier |
Message Element Intended Use |
Format for Message Element Display |
|
UM176 MAINTAIN OWN SEPARATION AND VMC |
N/A |
W/U |
N/A |
Notification that the pilot is responsible for maintaining separation from other traffic and is also responsible for maintaining Visual Meteorological Conditions. |
N/A |
TBL ENR 7.2-26 Additional Downlink Messages
|
CPDLC Message Sets |
Operational Definition in PANS-ATM (Doc 4444) |
||||
|
FANS 1/A |
ATN B1 |
Response |
Message Element Identifier |
Message Element Intended Use |
Format for Message Element Display |
|
DM74 REQUEST TO MAINTAIN OWN SEPARATION AND VMC |
N/A |
N |
N/A |
States a desire by the pilot to provide his/her own separation and remain in VMC. |
N/A |
|
DM78 AT (time) (distance) (tofrom) (position) |
N/A |
N |
N/A |
At the specified time, the aircraft's position was as specified. |
N/A |