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AIM

10/12/17

5−3−6

En Route Procedures

TBL 5−3−6

Crossing Constraint 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

UM49 CROSS (posi-

tion) AT AND MAIN-

TAIN (altitude)

Note 1. − A vertical

range cannot be pro-

vided.

Note 2. − This mes-

sage element is equiv-

alent 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 speci-

fied vertical range.

CROSS (position)

AT (level)

UM61 CROSS (posi-

tion) AT AND MAIN-

TAIN (altitude) AT

(speed)

Note 1. − A vertical

range cannot be pro-

vided.

Note 2. − This mes-

sage element is equiv-

alent 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)

TBL 5−3−7

Air Traffic Advisory 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

UM153 ALTIMETER

(altimeter)

Note  − The facility

designation and the

time of measurement

cannot be provided.

UM213 (facility

designation) 

ALTIMETER (al-

timeter)

Note  − The facility

designation is al-

ways provided and

the time of mea-

surement cannot be

provided.

ADVU−1

Advisory pro-

viding the

specified al-

timeter setting

for the speci-

fied facility.

(facility designa-

tion) ALTIMETER

(altimeter setting)

ADVU−1

3/15/07

7110.65R CHG 2

AIM

9/13/18