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AIM

10/12/17

5

−3−3

En Route Procedures

TBL 5

−3−3

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

DM59 DIVERTING
TO (position) VIA
(route clearance)
Note 1. 

− H alert at-

tribute 
Note 2. 

− N

 response attribute

N/A

N

1

LATD

−5

Report indicating
diverting to the
specified position
via the specified
route, which may
be sent without any
previous coordina-
tion 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 at-

tribute 
Note 2. 

− N

 response attribute

N/A

N

1

LATD

−6

Report indicating
that the aircraft is
offsetting to a par-
allel track at the
specified distance
in the specified di-
rection off from the
cleared route.

OFFSETTING
(specified distance)
(direction)

 

OF ROUTE

DM80 DEVIATING
(deviation offset)

 (di-

rection)

 OF ROUTE

Note 1. 

− H alert at-

tribute 
Note 2. 

− N response

attribute

N/A

N

1

LATD

−7

Report indicating
deviating specified
distance or degrees
in the specified di-
rection from the
cleared route.

DEVIATING
(specifiedDevia-
tion)

 (direction) OF

ROUTE

1  

ICAO Document 10037, Global Operational Data Link (GOLD) Manual has these values set to Y in their table.

TBL 5

−3−4

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

UM19 MAINTAIN
(altitude)
Note 

− Used for a sin-

gle level

UM19 
MAINTAIN (level)

W/U

LVLU

−5

Instruction to
maintain the speci-
fied level or verti-
cal range.

MAINTAIN (level)

UM20 CLIMB TO
AND MAINTAIN 
(altitude)
Note 

− Used for a sin-

gle level

UM20 CLIMB TO
(level)

W/U

LVLU

−6

Instruction that a
climb to the speci-
fied level or verti-
cal range is to
commence and
once reached is to
be maintained.

CLIMB TO (level)

9/13/18

AIM