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TBL 5

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Standard Response Downlink Message Elements (RSPD)

CPDLC Message Sets

Operational Definition in PANS

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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

RSPD

-

Indication that the

instruction is

understood and will

be complied with.

WILCO

DM1 UNABLE

DM1 UNABLE

RSPD

-

Indication that the

message cannot be

complied with.

UNABLE

DM2 STANDBY

DM2 STANDBY

RSPD

-

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

RSPD

-

Indication that the

message is

received.

ROGER

TBL 5

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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

UM166 DUE TO

TRAFFIC

SUPU

-

Indication that the

associated message

is issued due to the

specified reason.

DUE TO

(specified reason

uplink)

UM167 DUE TO

AIRSPACE

RESTRICTION

TBL 5

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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

SUPD

-

Indication that the

associated message

is issued due to the

specified reason.

DUE TO

(specified reason

downlink)

DM66 DUE TO

AIRCRAFT

PERFORMANCE

DM66 DUE TO

AIRCRAFT

PERFORMANCE

En Route Procedures

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