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TBL 5

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Lateral Downlink Message Elements (LATD)

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

DM59 DIVERTING

LATD

-

Report indicating

DIVERTING TO

TO

(position)

VIA

diverting to the

(position)

VIA

(route clearance)

specified position

(en

-

route data)

Note 1.

-

 H alert

via the specified

(arrival approach

attribute

route, which may

data[O])

Note 2.

-

 N

be sent without any

 response attribute

previous

coordination done

with ATC.

DM60

LATD

-

Report indicating

OFFSETTING

OFFSETTING

that the aircraft is

(specified distance)

(distance offset)

offsetting to a

(direction)

 OF

(direction)

 OF

parallel track at the  ROUTE

ROUTE

specified distance

Note 1.

-

 H alert

in the specified

attribute

direction off from

Note 2.

-

 N

the cleared route.

 response attribute

DM80 DEVIATING

(deviation offset)

(direction)

 OF

ROUTE

Note 1.

-

 H alert

attribute

Note 2.

-

 N response

attribute

LATD

-

Report indicating

deviating specified

distance or degrees

in the specified

direction from the

cleared route.

DEVIATING

(specifiedDeviation

) (direction)

 OF

ROUTE

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

TBL 5

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Level Uplink Message Elements (LVLU)

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

UM19 MAINTAIN

(altitude)

Note

-

 Used for a

single level

UM19

MAINTAIN

(level)

W/U

LVLU

-

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

-

Instruction that a

climb to the

specified level or

vertical range is to

commence and

once reached is to

be maintained.

CLIMB TO (

level

)

En Route Procedures

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