CS ACNS.B.DLS.B1.070 CPDLC uplink messages

ED Decision 2022/008/R

(See AMC1 ACNS.B.DLS.B1.070, GM1 ACNS.B.DLS.B1.070 and GM2 ACNS.B.DLS.B1.070)

The data link system is capable of receiving, processing and displaying the following message elements:

ID

Message

UM0

UNABLE

UM1

STANDBY

UM3

ROGER

UM4

AFFIRM

UM5

NEGATIVE

UM19

MAINTAIN [level]

UM20

CLIMB TO [level]

UM23

DESCEND TO [level]

UM26

CLIMB TO REACH [level] BY [time]

UM27

CLIMB TO REACH [level] BY [position]

UM28

DESCEND TO REACH [level] BY [time]

UM29

DESCEND TO REACH [level] BY [position]

UM46

CROSS [position] AT [level]

UM47

CROSS [position] AT OR ABOVE [level]

UM48

CROSS [position] AT OR BELOW [level]

UM51

CROSS [position] AT [time]

UM52

CROSS [position] AT OR BEFORE [time]

UM53

CROSS [position] AT OR AFTER [time]

UM54

CROSS [position] BETWEEN [time] AND [time]

UM55

CROSS [position] AT [speed]

UM61

CROSS [position] AT AND MAINTAIN

UM64

OFFSET [specifiedDistance] [direction] OF ROUTE

UM72

RESUME OWN NAVIGATION

UM74

PROCEED DIRECT TO [position]

UM79

CLEARED TO [position] VIA [routeClearance]

UM80

CLEARED [routeClearance]

UM82

CLEARED TO DEVIATE UP TO [specifiedDistance] [direction] OF ROUTE

UM92

HOLD AT [position] AS PUBLISHED MAINTAIN [level]

UM94

TURN [direction] HEADING [degrees]

UM96

CONTINUE PRESENT HEADING

UM106

MAINTAIN [speed]

UM107

MAINTAIN PRESENT SPEED

UM108

MAINTAIN [speed] OR GREATER

UM109

MAINTAIN [speed] OR LESS

UM116

RESUME NORMAL SPEED

UM117

CONTACT [unitname] [frequency]

UM120

MONITOR [unitname] [frequency]

UM123

SQUAWK [code]

UM133

REPORT PRESENT LEVEL

UM148

WHEN CAN YOU ACCEPT [level]

UM157

CHECK STUCK MICROPHONE [frequency]

UM159

ERROR [errorInformation]

UM162

SERVICE UNAVAILABLE

UM165

THEN

UM171

CLIMB AT [verticalRate] MINIMUM

UM172

CLIMB AT [verticalRate] MAXIMUM

UM173

DESCEND AT [verticalRate] MINIMUM

UM174

DESCEND AT [verticalRate] MAXIMUM

UM179

SQUAWK IDENT

UM183

[freetext]

UM190

FLY HEADING [degrees]

UM196

[freetext]

UM203

[freetext]

UM205

[freetext]

UM211

REQUEST FORWARDED

UM213

[facilitydesignation] ALTIMETER [altimeter]

UM215

TURN [direction] [degrees]

UM222

NO SPEED RESTRICTION

UM231

STATE PREFERRED LEVEL

UM232

STATE TOP OF DESCENT

UM237

REQUEST AGAIN WITH NEXT UNIT

The data link system is capable of receiving and processing the following message elements:

UM160

NEXT DATA AUTHORITY [facility]

UM227

LOGICAL ACKNOWLEDGEMENT

[Issue: CS-ACNS/4]

AMC1 ACNS.B.DLS.B1.070 CPDLC uplink messages

ED Decision 2022/008/R

The data link system should comply with EUROCAE Document ED-110B, Section 2.2.3, and with the CPDLC message syntax in ICAO Doc 9705 (Edition 2), Section 2.1.4.

The data link system should prepare the appropriate response downlink message to a received uplink message in compliance with EUROCAE Document ED‑110B, Section 2.2.3.3, Table 2-4. Received uplink messages with the response type ‘A/N’ indicated in the ‘Response’ column should be responded to with either DM2 (STANDBY), DM4 (AFFIRM) or DM5 (NEGATIVE). Received uplink messages with the response type ‘R’ indicated in the ‘Response’ column should be responded to with either DM2 (STANDBY), DM3 (ROGER) or DM1 (UNABLE).

The aircraft data link system should also handle unsupported messages (i.e. uplink messages not referenced in CS ACNS.B.DLS.B1.050) as specified in EUROCAE Document ED-110B, Section 3.3.7.6.

GM1 ACNS.B.DLS.B1.070 Uplink Messages

ED Decision 2013/031/R

The following table associates uplink CPDLC messages to the data link services.

ID

Message

ACM

ACL

AMC

UM0

UNABLE

 

x

 

UM1

STANDBY

 

x

 

UM3

ROGER

 

x

 

UM4

AFFIRM

 

x

 

UM5

NEGATIVE

 

x

 

UM19

MAINTAIN [level]

 

x

 

UM20

CLIMB TO [level]

 

x

 

UM23

DESCEND TO [level]

 

x

 

UM26

CLIMB TO REACH [level] BY [time]

 

x

 

UM27

CLIMB TO REACH [level] BY [position]

 

x

 

UM28

DESCEND TO REACH [level] BY [time]

 

x

 

UM29

DESCEND TO REACH [level] BY [position]

 

x

 

UM46

CROSS [position] AT [level]

 

x

 

UM47

CROSS [position] AT OR ABOVE [level]

 

x

 

UM48

CROSS [position] AT OR BELOW [level]

 

x

 

UM51

CROSS [position] AT [time]

 

x

 

UM52

CROSS [position] AT OR BEFORE [time]

 

x

 

UM53

CROSS [position] AT OR AFTER [time]

 

x

 

UM54

CROSS [position] BETWEEN [time] AND [time]

 

x

 

UM55

CROSS [position] AT [speed]

 

x

 

UM61

CROSS [position] AT AND MAINTAIN

 

x

 

UM64

OFFSET [specifiedDistance] [direction] OF ROUTE

 

x

 

UM72

RESUME OWN NAVIGATION

 

x

 

UM74

PROCEED DIRECT TO [position]

 

x

 

UM79

CLEARED TO [position] VIA [routeClearance]

 

x

 

UM80

CLEARED [routeClearance]

 

x

 

UM82

CLEARED TO DEVIATE UP TO [specifiedDistance] [direction] OF ROUTE

 

x

 

UM92

HOLD AT [position] AS PUBLISHED MAINTAIN [level]

 

x

 

UM94

TURN [direction] HEADING [degrees]

 

x

 

UM96

CONTINUE PRESENT HEADING

 

x

 

UM106

MAINTAIN [speed]

 

x

 

UM107

MAINTAIN PRESENT SPEED

 

x

 

UM108

MAINTAIN [speed] OR GREATER

 

x

 

UM109

MAINTAIN [speed] OR LESS

 

x

 

UM116

RESUME NORMAL SPEED

 

x

 

UM117

CONTACT [unitname] [frequency]

x

 

 

UM120

MONITOR [unitname] [frequency]

x

 

 

UM123

SQUAWK [code]

 

x

 

UM133

REPORT PRESENT LEVEL

 

x

 

UM148

WHEN CAN YOU ACCEPT [level]

 

x

 

UM157

CHECK STUCK MICROPHONE [frequency]

 

 

x

UM159

ERROR [errorInformation]

x

x

 

UM160

NEXT DATA AUTHORITY [facility]

x

 

 

UM162

SERVICE UNAVAILABLE

 

x

 

UM165

THEN

 

x

 

UM171

CLIMB AT [verticalRate] MINIMUM

 

x

 

UM172

CLIMB AT [verticalRate] MAXIMUM

 

x

 

UM173

DESCEND AT [verticalRate] MINIMUM

 

x

 

UM174

DESCEND AT [verticalRate] MAXIMUM

 

x

 

UM179

SQUAWK IDENT

 

x

 

UM183

[freetext]

x

x

x

UM190

FLY HEADING [degrees]

 

x

 

UM196

[freetext]

 

x

 

UM203

[freetext]

 

x

 

UM205

[freetext]

 

x

 

UM211

REQUEST FORWARDED

 

x

 

UM213

[facilitydesignation] ALTIMETER [altimeter]

 

x

 

UM215

TURN [direction] [degrees]

 

x

 

UM222

NO SPEED RESTRICTION

 

x

 

UM227

LOGICAL ACKNOWLEDGEMENT

x

x

 

UM231

STATE PREFERRED LEVEL

 

x

 

UM232

STATE TOP OF DESCENT

 

x

 

UM237

REQUEST AGAIN WITH NEXT UNIT

x

x

 

GM2 ACNS.B.DLS.B1.070 Uplink Messages

ED Decision 2013/031/R

The above ACL messages correspond to the common subset of ACL messages defined in EUROCAE Document ED-120 section 5.2.1.1.5 as required by Regulation (EC) No 29/2009.

CS ACNS.B.DLS.B1.075 CPDLC downlink messages

ED Decision 2022/008/R

(See AMC1 ACNS.B.DLS.B1.075, GM1 ACNS.B.DLS.B1.075, GM2 ACNS.B.DLS.B1.075 and GM3 ACNS.B.DLS.B1.075)

The data link system is capable of preparing and sending the following downlink message elements:

ID

Message

DM0

WILCO

DM1

UNABLE

DM2

STANDBY

DM3

ROGER

DM4

AFFIRM

DM5

NEGATIVE

DM6

REQUEST [level]

DM18

REQUEST [speed]

DM22

REQUEST DIRECT TO [position]

DM32

PRESENT LEVEL [level]

DM62

ERROR [errorInformation]

DM63

NOT CURRENT DATA AUTHORITY

DM65

DUE TO WEATHER

DM66

DUE TO AIRCRAFT PERFORMANCE

DM81

WE CAN ACCEPT [level] AT [time]

DM82

WE CANNOT ACCEPT [level]

DM98

[freetext]

DM99

CURRENT DATA AUTHORITY

DM100

LOGICAL ACKNOWLEDGEMENT

DM106

PREFERRED LEVEL [level]

DM107

NOT AUTHORIZED NEXT DATA AUTHORITY

DM109

TOP OF DESCENT [time]

[Issue: CS-ACNS/4]

AMC1 ACNS.B.DLS.B1.075 Downlink messages

ED Decision 2022/008/R

The data link system should comply with EUROCAE Document ED-110B, Section 2.2.3, and with the CPDLC message syntax in ICAO Doc 9705 (Edition 2), Section 2.1.4.

The data link aircraft equipment should prepare the appropriate response downlink message to a received uplink message in compliance with EUROCAE Document ED-110B, Section 2.2.3.3, Table 2-4.

[Issue: CS-ACNS/4]

GM1 ACNS.B.DLS.B1.075 Downlink messages

ED Decision 2022/008/R

The following table associates downlink messages with data link services.

ID

Message

ACM

ACL

AMC

DM0

WILCO

x

x

 

DM1

UNABLE

x

x

 

DM2

STANDBY

x

x

 

DM3

ROGER

 

x

 

DM4

AFFIRM

 

x

 

DM5

NEGATIVE

 

x

 

DM6

REQUEST [level]

 

x

 

DM18

REQUEST [speed]

 

x

 

DM22

REQUEST DIRECT TO [position]

 

x

 

DM32

PRESENT LEVEL [level]

 

x

 

DM62

ERROR [errorInformation]

x

x

 

DM63

NOT CURRENT DATA AUTHORITY

x

 

 

DM65

DUE TO WEATHER

 

x

 

DM66

DUE TO AIRCRAFT PERFORMANCE

 

x

 

DM81

WE CAN ACCEPT [level] AT [time]

 

x

 

DM82

WE CANNOT ACCEPT [level]

 

x

 

DM98

[freetext]

x

x

 

DM99

CURRENT DATA AUTHORITY

x

 

 

DM100

LOGICAL ACKNOWLEDGEMENT

x

x

 

DM106

PREFERRED LEVEL [level]

 

x

 

DM107

NOT AUTHORIZED NEXT DATA AUTHORITY

x

x

 

DM109

TOP OF DESCENT [time]

 

x

 

[Issue: CS-ACNS/4]

GM2 ACNS.B.DLS.B1.075 Downlink Messages

ED Decision 2013/031/R

The above ACL messages correspond to the common subset of ACL messages defined in EUROCAE Document ED-120 section 5.2.1.1.5 as required by Regulation (EC) No 29/2009.

GM3 ACNS.B.DLS.B1.075 Optional ACL Downlink Messages

ED Decision 2013/031/R

The data link system may also allow the sending the following ACL messages defined in EUROCAE Document ED-120 section 5.2.1.1.5. The message syntax should also comply with ICAO Doc 9705 (Edition 2), section 2.3.4.

ID

Message

DM9

REQUEST CLIMB TO [level]

DM10

REQUEST DESCENT TO [level]

DM27

REQUEST WEATHER DEVIATION UP TO [specifiedDistance] [direction] OF ROUTE

Note: To prevent costly retrofitting, implementation of the above optional messages is highly recommended.