User's Guide
Table Of Contents
- 1 Introduction
- 1.1 Audience
- 1.2 Overview
- 1.3 Envoy CMU Features
- 1.4 Configuration Options for Envoy
- 2 Operation of Envoy
- 3 CPDLC Operations
- 3.1 Log On
- 3.2 Logoff
- 3.3 Lost Connection
- 3.4 Typical Message Composition
- 3.5 ATC Menu
- 3.5.1 ATC Request Menu – FANS 1/A+ and ATN B1 CPDLC Common
- 3.5.2 ATC REPORT Menu
- 3.5.3 WHEN CAN WE EXPECT
- 3.5.4 POS REPORT Message – FANS 1/A+
- 3.5.5 EMERGENCY (MAYDAY) Message – FANS 1/A+
- 3.5.6 ATC MSG LOG
- 3.5.7 CLEARANCE REQUESTS – FANS 1/A+
- 3.5.8 FREE TEXT 1/2
- 3.5.9 ATC VOICE CONTACT Message – FANS 1/A+
- 3.5.10 Cancel EMERGENCY, Cancel ADS
- 3.5.11 Flight Plan Transactions and Monitoring
- 4 Automatic Dependent Surveillance (ADS)
- 5 ACARS Operations
- 6 MAINTENANCE Menu
- Appendix A Acronyms
- Appendix B AFN Messages
- Appendix C Supported CPDLC Messages
- Appendix D ADS-C Tags
- Appendix E ACARS Message Labels
- Appendix F ATSU Call Signs (ICAO, IATA)
- Appendix G Fault Management
User Guide for the Envoy Data Link
Document Number: UG-15000 Rev. A Page 113 of 173
Section
ID
CPDLC DM/Example
Message Intent
PANS/GOLD
57
[remainingFuel] of FUEL
REMAINING AND
[remainingSouls] SOULS ON
BOARD
HH:MM of FUEL REMAINING
AND 999 SOULS ON BOARD
Hour(s) and minutes left before
running out of fuel and number of
people on board: an emergency
message. High level urgency.
0 58 CANCEL EMERGENCY Reset ADS EMER OFF
3.5.5
59
DIVERTING TO [position] VIA
[routeClearance]
DIVERTING TO EBBU VIA
XYZ
Emergency Urgency: High level.
Report indication diverting to
specified position via specified
route and which may be sent
without any previous coordination
with ATC.
60
OFFSETTING [distanceOffset]
[direction] AT [time or waypoint]
Emergency Urgency: High level.
Report that aircraft is offsetting to a
parallel track from the cleared
route
61
DESCENDING TO [level]
DESCENDING TO FL250
URGENT alert. Report indicating
descending to specified level
-- 62
ERROR [errorInformation]
ERROR INSUFFICIENT
RESOURCES
A system-generated message that
the avionics has detected an error.
4.6-27 System
Management
Messages
-- 63
NOT CURRENT DATA
AUTHORITY
A system-generated denial to any
CPDLC message sent from a
ground facility that is not the
current data authority.
-- 64 [icaofacilitydesignation]
ID for current ATSU or next data
authority (NDA)
3.5.1
65 DUE TO WEATHER
Used to explain reasons for pilots
message.
4.6-28
Additional
Messages
66
DUE TO AIRCRAFT
PERFORMANCE
Used to explain reasons for pilots
message.
3.5.8 67 [freeText]
Up to 256 alphanumeric characters
and symbols
67(1)
‘ETA [position] TIME [time]’
Response to UM 141
4.6-29 Pre-
formatted free
text
67(2)
‘PREFERRED LEVEL [level]’
FANS response to UM169(8)
67(3)
‘WE CAN ACCEPT [level] AT
[time]’
Indication that the specified level
can be accepted at the specified
time. FANS (ATN is DM81)
67(4)
‘WE CAN ACCEPT [level] AT
[position]’
Indication that the specified level
can be accepted at the specified
position
67(5) ‘WE CANNOT ACCEPT [level]’
Indication that the specified level
cannot be accepted (ATN is DM82)
67(6) 67(6) ‘TOP OF DESCENT [time]’
Shortcut: TOD in free text.
Notification of the preferred time
and position to commence descent
for approach (ATN: DM109(
67(7) 67(7) ‘GROUND SPEED [speed]’
Report indicating the speed.
Accepts input GS. FANS only.
67(8) 67(8)
‘WE CAN ACCEPT [speed] AT
[position]’
Indication that the specified speed
can be accepted at the specified
position.
67(9) 67(9)
‘WE CAN ACCEPT [speed] AT
[time]’
Indication that the specified speed
can be accepted at the specified
time.