Links in column 2 are to the message on the site Airframes. Messages without a link are from a non-persistent source. Decoded versions of messages are shown with grey background.


timelinkserial
[icao]
acars
message
2025-10-18 20:13:54.520Z573900073308-8192
[ae2fa4]
88192A
2510186201345
[UTC REQUEST/uplink]

UTC: 2025-10-18 Saturday 20:13:45
2025-10-18 20:19:20.569Z573902399608-8192
[ae2fa4]
88192A
- #MDINI/ID88192A,RCH535,PES05TH04291/MR1,0/AFKTCM,LERT/TD182115,2115F97A
[INIITIALISE/uplink]

ACARS ADDR: 88192A
FLIGHT ID: RCH535
MISSION NO: PES05TH04291
MESSAGE REF: 1,0

FLIGHT FROM: KTCM (McChord AFB)
DESTINATION: LERT (NS Rota)
PLANNED DEP TIME: 18/21:15
ESTIMATED DEP TIME: 21:15
2025-10-18 21:42:32.520Z573935837808-8192
[ae2fa4]
88192A
- #MD/A0 USADCXA.AFN/FMHRCH535,.88192A,,214144/FAK0,KUSA/FARADS,1,USADCXA/FARATC,0,USADCXA8EDD
[AFN RESPONSE/uplink from USADCXA (USA Domestic)]

TO AIRCRAFT:
ID: RCH535
REG: 88192A
TIMESTAMP: 21:41:44

LOGON ACKNOWLDGEMENT WITH KUSA (USA Domestic) status 0
ADS-C status 1 ADDRESS: USADCXA (USA Domestic)
CPDLC status 0 ADDRESS: USADCXA (USA Domestic)
2025-10-18 21:42:42.536Z573935897108-8192
[ae2fa4]
88192A
- #MD/AA USADCXA.CR1.88192A20569B28E5D5A7047AA0
[CPDLC/uplink from USADCXA (USA Domestic) to 88192A]

MSG ID: 0
TIMESTAMP: 21:41:44

CONNECTION REQUEST KUSA (USA Domestic) LabelA
2025-10-18 21:42:58.524Z573935984508-8192
[ae2fa4]
88192A
- #MD/AA USADCXA.CR1.88192A20D6A768E5D5A704E45E
[CPDLC/uplink from USADCXA (USA Domestic) to 88192A]

MSG ID: 1
TIMESTAMP: 21:42:29

CONNECTION REQUEST KUSA (USA Domestic) LabelA
2025-10-18 21:43:20.515Z573936108208-8192
[ae2fa4]
88192A
- #MD/AA USADCXA.AT1.88192A2156AEEA4E61CF9D1A4D29A821D089321A0873E754830EA20AF26A48412EAD382B90529F1E2D25F061C38B42A20A9224D341362D3A7063C53466
[CPDLC/uplink from USADCXA (USA Domestic) to 88192A]

MSG ID: 2
TIMESTAMP: 21:42:59

CONFIRM CPDLC CONTACT WITH KUSA. ROGER/ACCEPT THIS MESSAGE
2025-10-18 21:44:14.478Z573936435008-8192
[ae2fa4]
88192A
- #MD/AA USADCXA.AT1.88192A21D6C0E821DAAD48B7EC
[CPDLC/uplink from USADCXA (USA Domestic) to 88192A]

MSG ID: 3
TIMESTAMP: 21:44:03

NEXT DATA AUTHORITY CZVR (Vancouver)
2025-10-18 21:44:30.531Z573936543408-8192
[ae2fa4]
88192A
- #MD/A0 USADCXA.AFN/FMHRCH535,.88192A,,214419/FCAYVRE2YA,14F2D
[AFN RESPONSE/uplink from USADCXA (USA Domestic)]

TO AIRCRAFT:
ID: RCH535
REG: 88192A
TIMESTAMP: 21:44:19

CONTACT ADDRESS: YVRE2YA (Vancouver Domestic)
2025-10-18 21:45:08.499Z573936773808-8192
[ae2fa4]
88192A
- #MD/A0 YVRE2YA.AFN/FMHRCH535,.88192A,,214450/FAK0,CZVR/FARADS,0/FARATC,0,YVRE2YAB801
[AFN RESPONSE/uplink from YVRE2YA (Vancouver Domestic)]

TO AIRCRAFT:
ID: RCH535
REG: 88192A
TIMESTAMP: 21:44:50

LOGON ACKNOWLDGEMENT WITH CZVR (Vancouver) status 0
ADS-C status 0
CPDLC status 0 ADDRESS: YVRE2YA (Vancouver Domestic)
2025-10-18 21:49:08.599Z573938269708-8192
[ae2fa4]
88192A
- #MD/AA YVRE2YA.CR1.88192A20570E68E1DAAD48DE4F
[CPDLC/uplink from YVRE2YA (Vancouver Domestic) to 88192A]

MSG ID: 0
TIMESTAMP: 21:48:57

CONNECTION REQUEST CZVR (Vancouver) LabelA
2025-10-18 21:56:02.551Z573940871808-8192
[ae2fa4]
88192A
- #MD/AA USADCXA.AT1.88192AA2577D1D6D5A0CE873EAD68B4831238A101100
[CPDLC/uplink from USADCXA (USA Domestic) to 88192A]

MSG ID: 4
TIMESTAMP: 21:55:52

CONTACT VANCOUVER CENTER VHF 134.550 MHz
END SERVICE
2025-10-18 21:58:24.521Z573941814608-8192
[ae2fa4]
88192A
- #MD/AA YVRE2YA.AT1.88192A20D7A1EA52AA48934D049A6820CE4106AD49F360D48B1104D8B4E9C18F150549E821CF9D1A4D29A821D089321A0873E754830EA20AF26A48415A0CE873EAD68B490438B3AA45A43927
[CPDLC/uplink from YVRE2YA (Vancouver Domestic) to 88192A]

MSG ID: 1
TIMESTAMP: 21:58:07

THIS IS AN AUTOMATED MESSAGE TO CONFIRM CPDLC CONTACT WITH VANCOUVER CENTER
2025-10-18 22:00:18.534Z573942535808-8192
[ae2fa4]
88192A
- #MD/AA YVRE2YA.AT1.88192A215801E821DA8B1C633C
[CPDLC/uplink from YVRE2YA (Vancouver Domestic) to 88192A]

MSG ID: 2
TIMESTAMP: 22:00:07

NEXT DATA AUTHORITY CZEG (Edmonton)
2025-10-18 22:00:36.513Z573942653908-8192
[ae2fa4]
88192A
- #MD/A0 YVRE2YA.AFN/FMHRCH535,.88192A,,220018/FCAYEGE2YA,05C58
[AFN RESPONSE/uplink from YVRE2YA (Vancouver Domestic)]

TO AIRCRAFT:
ID: RCH535
REG: 88192A
TIMESTAMP: 22:00:18

CONTACT ADDRESS: YEGE2YA (Edmonton CPDLC)
2025-10-18 22:01:34.536Z573943010708-8192
[ae2fa4]
88192A
- #MD/A0 YEGE2YA.AFN/FMHRCH535,.88192A,,220107/FAK0,CZEG/FARADS,0/FARATC,0,YEGE2YA0DBE
[AFN RESPONSE/uplink from YEGE2YA (Edmonton CPDLC)]

TO AIRCRAFT:
ID: RCH535
REG: 88192A
TIMESTAMP: 22:01:07

LOGON ACKNOWLDGEMENT WITH CZEG (Edmonton) status 0
ADS-C status 0
CPDLC status 0 ADDRESS: YEGE2YA (Edmonton CPDLC)
2025-10-18 22:01:46.521Z573943082308-8192
[ae2fa4]
88192A
- #MD/AA YEGE2YA.CR1.88192A205818A8E1DA8B1C464A
[CPDLC/uplink from YEGE2YA (Edmonton CPDLC) to 88192A]

MSG ID: 0
TIMESTAMP: 22:01:34

CONNECTION REQUEST CZEG (Edmonton) LabelA
2025-10-18 22:02:00.496Z573943168108-8192
[ae2fa4]
88192A
- #MD/AA YVRE2YA.AT1.88192A21D8195D6B1624D9F3AA4F9C18BA601845
[CPDLC/uplink from YVRE2YA (Vancouver Domestic) to 88192A]

MSG ID: 3
TIMESTAMP: 22:01:37

CONTACT EDMONTON CENTER VHF 134.875 MHz
2025-10-18 22:02:38.524Z573943412808-8192
[ae2fa4]
88192A
- #MD/AA YVRE2YA.AT1.88192A2258262840C6BC
[CPDLC/uplink from YVRE2YA (Vancouver Domestic) to 88192A]

MSG ID: 4
TIMESTAMP: 22:02:24

END SERVICE
2025-10-18 22:04:50.536Z573944291608-8192
[ae2fa4]
88192A
- #MD/AA YEGE2YA.AT1.88192A20D848AA526A48934D049A6820CE4106AD49F360D48B1104D8B4E9C18F150549E821CF9D1A4D29A821D089321A0873E754830EA20AF26A48411624D9F3AA4F9C821C59D522D21C31
[CPDLC/uplink from YEGE2YA (Edmonton CPDLC) to 88192A]

MSG ID: 1
TIMESTAMP: 22:04:34

THIS IS AN AUTOMATED MESSAGE TO CONFIRM CPDLC CONTACT WITH EDMONTON CENTER
2025-10-18 22:05:30.506Z573944561708-8192
[ae2fa4]
88192A
- #MD/AA YEGE2YA.AT1.88192A215853A240EFC5
[CPDLC/uplink from YEGE2YA (Edmonton CPDLC) to 88192A]

MSG ID: 2
TIMESTAMP: 22:05:14

CONFIRM ASSIGNED ROUTE
2025-10-18 22:13:18.524Z573947546308-8192
[ae2fa4]
88192A
- #MD/AA YEGE2YA.AT1.88192A21D8D19E2B1624D9F3AA4F9C1927C026A9
[CPDLC/uplink from YEGE2YA (Edmonton CPDLC) to 88192A]

MSG ID: 3
TIMESTAMP: 22:13:06

MONITOR EDMONTON CENTER VHF 135.750 MHz
2025-10-18 22:20:46.502Z573950417808-8192
[ae2fa4]
88192A
- #MD/AA YEGE2YA.AT1.88192A225948A821DAAF1CEA90
[CPDLC/uplink from YEGE2YA (Edmonton CPDLC) to 88192A]

MSG ID: 4
TIMESTAMP: 22:20:34

NEXT DATA AUTHORITY CZWG (Winnipeg)
2025-10-18 22:20:56.498Z573950470308-8192
[ae2fa4]
88192A
- #MD/A0 YEGE2YA.AFN/FMHRCH535,.88192A,,222046/FCAYWGE2YA,01ACC
[AFN RESPONSE/uplink from YEGE2YA (Edmonton CPDLC)]

TO AIRCRAFT:
ID: RCH535
REG: 88192A
TIMESTAMP: 22:20:46

CONTACT ADDRESS: YWGE2YA (Winnipeg Domestic)
2025-10-18 22:21:36.489Z573950710708-8192
[ae2fa4]
88192A
- #MD/A0 YWGE2YA.AFN/FMHRCH535,.88192A,,222118/FAK0,CZWG/FARADS,0/FARATC,0,YWGE2YAAAAE
[AFN RESPONSE/uplink from YWGE2YA (Winnipeg Domestic)]

TO AIRCRAFT:
ID: RCH535
REG: 88192A
TIMESTAMP: 22:21:18

LOGON ACKNOWLDGEMENT WITH CZWG (Winnipeg) status 0
ADS-C status 0
CPDLC status 0 ADDRESS: YWGE2YA (Winnipeg Domestic)
2025-10-18 22:30:56.501Z573954064808-8192
[ae2fa4]
88192A
- #MD/AA YWGE2YA.CR1.88192A2059E8E8E1DAAF1CB4DD
[CPDLC/uplink from YWGE2YA (Winnipeg Domestic) to 88192A]

MSG ID: 0
TIMESTAMP: 22:30:35

CONNECTION REQUEST CZWG (Winnipeg) LabelA
2025-10-18 22:39:00.513Z573957014508-8192
[ae2fa4]
88192A
- #MD/AA YEGE2YA.AT1.88192A22DA6C5D6B5E4CE9D268458E18C6E00C0D
[CPDLC/uplink from YEGE2YA (Edmonton CPDLC) to 88192A]

MSG ID: 5
TIMESTAMP: 22:38:49

CONTACT WINNIPEG CENTER VHF 134.975 MHz
2025-10-18 22:39:46.502Z573957301508-8192
[ae2fa4]
88192A
- #MD/AA YEGE2YA.AT1.88192A235A752840861B
[CPDLC/uplink from YEGE2YA (Edmonton CPDLC) to 88192A]

MSG ID: 6
TIMESTAMP: 22:39:20

END SERVICE
2025-10-18 22:41:52.541Z573958087708-8192
[ae2fa4]
88192A
- #MD/AA YWGE2YA.AT1.88192A20DA98EA526A48934D049A6820CE4106AD49F360D48B1104D8B4E9C18F150549E821CF9D1A4D29A821D089321A0873E754830EA20AF26A48415E4CE9D268458E821C59D522D2D582
[CPDLC/uplink from YWGE2YA (Winnipeg Domestic) to 88192A]

MSG ID: 1
TIMESTAMP: 22:41:35

THIS IS AN AUTOMATED MESSAGE TO CONFIRM CPDLC CONTACT WITH WINNIPEG CENTER
2025-10-18 22:59:14.526Z573964596608-8192
[ae2fa4]
88192A
- #MD/AA YWGE2YA.AT1.88192A215BB0DD6B5E4CE9D268458E17C38021C7
[CPDLC/uplink from YWGE2YA (Winnipeg Domestic) to 88192A]

MSG ID: 2
TIMESTAMP: 22:59:03

CONTACT WINNIPEG CENTER VHF 132.900 MHz
2025-10-18 23:16:06.502Z573971013508-8192
[ae2fa4]
88192A
- #MD/AA YWGE2YA.AT1.88192A21DCFD1E2B5E4CE9D268458E11B580310F
[CPDLC/uplink from YWGE2YA (Winnipeg Domestic) to 88192A]

MSG ID: 3
TIMESTAMP: 23:15:52

MONITOR WINNIPEG CENTER VHF 120.500 MHz
2025-10-18 23:31:54.490Z573976749608-8192
[ae2fa4]
88192A
- #MD/AA YWGE2YA.AT1.88192A225DFADD6B5E4CE9D268458E136B00CB56
[CPDLC/uplink from YWGE2YA (Winnipeg Domestic) to 88192A]

MSG ID: 4
TIMESTAMP: 23:31:43

CONTACT WINNIPEG CENTER VHF 124.000 MHz
2025-10-18 23:40:14.512Z573979529208-8192
[ae2fa4]
88192A
- #MD/AA YWGE2YA.AT1.88192A22DE8092849F5A1418E0422A
[CPDLC/uplink from YWGE2YA (Winnipeg Domestic) to 88192A]

MSG ID: 5
TIMESTAMP: 23:40:02

PROCEED DIRECT TO OVBAG
2025-10-19 00:04:02.489Z573987925508-8192
[ae2fa4]
88192A
- #MD/AA YWGE2YA.AT1.88192A23003CDD6B5E4CE9D268458E182780AC8E
[CPDLC/uplink from YWGE2YA (Winnipeg Domestic) to 88192A]

MSG ID: 6
TIMESTAMP: 00:03:51

CONTACT WINNIPEG CENTER VHF 133.700 MHz
2025-10-19 00:14:18.523Z573991517408-8192
[ae2fa4]
88192A
- #MD/AA YWGE2YA.AT1.88192A2380E22821DAAB30AB31
[CPDLC/uplink from YWGE2YA (Winnipeg Domestic) to 88192A]

MSG ID: 7
TIMESTAMP: 00:14:08

NEXT DATA AUTHORITY CZUL (Montreal)
2025-10-19 00:14:28.506Z573991575008-8192
[ae2fa4]
88192A
- #MD/A0 YWGE2YA.AFN/FMHRCH535,.88192A,,001416/FCAYULE2YA,006A3
[AFN RESPONSE/uplink from YWGE2YA (Winnipeg Domestic)]

TO AIRCRAFT:
ID: RCH535
REG: 88192A
TIMESTAMP: 00:14:16

CONTACT ADDRESS: YULE2YA (Montreal Domestic)
2025-10-19 00:15:00.502Z573991760908-8192
[ae2fa4]
88192A
- #MD/A0 YULE2YA.AFN/FMHRCH535,.88192A,,001445/FAK0,CZUL/FARADS,0/FARATC,0,YULE2YAF225
[AFN RESPONSE/uplink from YULE2YA (Montreal Domestic)]

TO AIRCRAFT:
ID: RCH535
REG: 88192A
TIMESTAMP: 00:14:45

LOGON ACKNOWLDGEMENT WITH CZUL (Montreal) status 0
ADS-C status 0
CPDLC status 0 ADDRESS: YULE2YA (Montreal Domestic)
2025-10-19 00:16:10.520Z573992184808-8192
[ae2fa4]
88192A
- #MD/AA YULE2YA.CR1.88192A2000FEE8E1DAAB30CBC9
[CPDLC/uplink from YULE2YA (Montreal Domestic) to 88192A]

MSG ID: 0
TIMESTAMP: 00:15:59

CONNECTION REQUEST CZUL (Montreal) LabelA
2025-10-19 00:22:08.528Z573994273608-8192
[ae2fa4]
88192A
- #MD/A6 YULE2YA.ADS.88192A080112B24954
[ADS-C/uplink from YULE2YA (Montreal Domestic) to 88192A]

EVENT CONTRACT REQUEST
CONTRACT NUM: 1
REPORT WHEN VERTICAL SPEED IS: < -4992 FT/MIN
2025-10-19 00:22:18.491Z573994332808-8192
[ae2fa4]
88192A
- #MD/A6 YULE2YA.ADS.88192A07020BD70D010F0110018E42
[ADS-C/uplink from YULE2YA (Montreal Domestic) to 88192A]

PERIODIC CONTRACT REQUEST
CONTRACT NUM: 2
INTERVAL: 1536 SEC
PREDICTED ROUTE: EVERY 1 REPORT(S)
AIR REFERENCE DATA: EVERY 1 REPORT(S)
METEO DATA: EVERY 1 REPORT(S)
2025-10-19 00:28:14.507Z573996356508-8192
[ae2fa4]
88192A
- #MD/AA YWGE2YA.AT1.88192A2401C11D6B367CEA94A2C1981849E0ED1A
[CPDLC/uplink from YWGE2YA (Winnipeg Domestic) to 88192A]

MSG ID: 8
TIMESTAMP: 00:28:04

CONTACT MONTREAL CENTER VHF 133.975 MHz
2025-10-19 00:28:48.499Z573996526908-8192
[ae2fa4]
88192A
- #MD/AA YWGE2YA.AT1.88192A2481C86840E6B1
[CPDLC/uplink from YWGE2YA (Winnipeg Domestic) to 88192A]

MSG ID: 9
TIMESTAMP: 00:28:33

END SERVICE
2025-10-19 00:31:00.543Z573997288408-8192
[ae2fa4]
88192A
- #MD/AA YULE2YA.AT1.88192A2081EA6A526A48934D049A6820CE4106AD49F360D48B1104D8B4E9C18F150549E821CF9D1A4D29A821D089321A0873E754830EA20AF26A4841367CEA94A2C198821C59D522D28BBE
[CPDLC/uplink from YULE2YA (Montreal Domestic) to 88192A]

MSG ID: 1
TIMESTAMP: 00:30:41

THIS IS AN AUTOMATED MESSAGE TO CONFIRM CPDLC CONTACT WITH MONTREAL CENTER
2025-10-19 00:48:07.666Z574002948308-8192
[ae2fa4]
88192A
- #MD/A6 YULE2YA.ADS.88192A07030B000F01B605
[ADS-C/uplink from YULE2YA (Montreal Domestic) to 88192A]

PERIODIC CONTRACT REQUEST
CONTRACT NUM: 3
ON DEMAND
AIR REFERENCE DATA: EVERY 1 REPORT(S)
2025-10-19 01:03:33.716Z574007735908-8192
[ae2fa4]
88192A
- #MD/AA YULE2YA.AT1.88192A2104359D6B367CEA94A2C19817D320276D
[CPDLC/uplink from YULE2YA (Montreal Domestic) to 88192A]

MSG ID: 2
TIMESTAMP: 01:03:22

CONTACT MONTREAL CENTER VHF 133.025 MHz
2025-10-19 01:28:11.637Z574015042008-8192
[ae2fa4]
88192A
- #MD/AA YULE2YA.AT1.88192A2185BEE821DAA334DCD2
[CPDLC/uplink from YULE2YA (Montreal Domestic) to 88192A]

MSG ID: 3
TIMESTAMP: 01:27:59

NEXT DATA AUTHORITY CZQM (Moncton)
2025-10-19 01:28:27.666Z574015116708-8192
[ae2fa4]
88192A
- #MD/A0 YULE2YA.AFN/FMHRCH535,.88192A,,012815/FCAYQME2YA,06C4C
[AFN RESPONSE/uplink from YULE2YA (Montreal Domestic)]

TO AIRCRAFT:
ID: RCH535
REG: 88192A
TIMESTAMP: 01:28:15

CONTACT ADDRESS: YQME2YA (Moncton Center)
2025-10-19 01:29:47.668Z574015536908-8192
[ae2fa4]
88192A
- #MD/A0 YQME2YA.AFN/FMHRCH535,.88192A,,012919/FAK0,CZQM/FARADS,0/FARATC,0,YQME2YAAED9
[AFN RESPONSE/uplink from YQME2YA (Moncton Center)]

TO AIRCRAFT:
ID: RCH535
REG: 88192A
TIMESTAMP: 01:29:19

LOGON ACKNOWLDGEMENT WITH CZQM (Moncton) status 0
ADS-C status 0
CPDLC status 0 ADDRESS: YQME2YA (Moncton Center)
2025-10-19 01:37:57.643Z574017999808-8192
[ae2fa4]
88192A
- #MD/AA YQME2YA.CR1.88192A20065BA8E1DAA3341080
[CPDLC/uplink from YQME2YA (Moncton Center) to 88192A]

MSG ID: 0
TIMESTAMP: 01:37:46

CONNECTION REQUEST CZQM (Moncton) LabelA
2025-10-19 01:42:57.613Z574019491008-8192
[ae2fa4]
88192A
- #MD/A6 YQME2YA.ADS.88192A080112B24954
[ADS-C/uplink from YQME2YA (Moncton Center) to 88192A]

EVENT CONTRACT REQUEST
CONTRACT NUM: 1
REPORT WHEN VERTICAL SPEED IS: < -4992 FT/MIN
2025-10-19 01:43:09.645Z574019550808-8192
[ae2fa4]
88192A
- #MD/A6 YQME2YA.ADS.88192A07020BCB0C010D010F0110014487
[ADS-C/uplink from YQME2YA (Moncton Center) to 88192A]

PERIODIC CONTRACT REQUEST
CONTRACT NUM: 2
INTERVAL: 768 SEC
FLIGHT ID: EVERY 1 REPORT(S)
PREDICTED ROUTE: EVERY 1 REPORT(S)
AIR REFERENCE DATA: EVERY 1 REPORT(S)
METEO DATA: EVERY 1 REPORT(S)
2025-10-19 01:46:33.645Z574020557108-8192
[ae2fa4]
88192A
- #MD/AA YULE2YA.AT1.88192A2206E59D69367CE87527CE0A46D0F9E5
[CPDLC/uplink from YULE2YA (Montreal Domestic) to 88192A]

MSG ID: 4
TIMESTAMP: 01:46:22

CONTACT MONCTON CENTER VHF 126.325 MHz
2025-10-19 01:47:13.616Z574020761508-8192
[ae2fa4]
88192A
- #MD/AA YULE2YA.AT1.88192A2286F028401BD1
[CPDLC/uplink from YULE2YA (Montreal Domestic) to 88192A]

MSG ID: 5
TIMESTAMP: 01:47:00

END SERVICE
2025-10-19 01:48:09.648Z574021043108-8192
[ae2fa4]
88192A
- #MD/A6 YULE2YA.ADS.88192A01B88F
[ADS-C/uplink from YULE2YA (Montreal Domestic) to 88192A]

CANCEL ALL CONTRACTS AND TERMINATE CONNECTION
2025-10-19 01:48:45.711Z574021220408-8192
[ae2fa4]
88192A
- #MD/AA YQME2YA.AT1.88192A2087072A522A48934D049A6820CE4106AD49F360D48B1104D8B4E9C18F150549E821CF9D1A4D29A821D089321A0873E754830EA20AF26A4841367CE87527CE410E2CEA916900437B
[CPDLC/uplink from YQME2YA (Moncton Center) to 88192A]

MSG ID: 1
TIMESTAMP: 01:48:28

THIS IS AN AUTOMATED MESSAGE TO CONFIRM CPDLC CONTACT WITH MONCTON CENTER
2025-10-19 02:06:49.669Z574026526408-8192
[ae2fa4]
88192A
- #MD/AA YQME2YA.AT1.88192A2108689E29367CE87527CE0BCA50BD72
[CPDLC/uplink from YQME2YA (Moncton Center) to 88192A]

MSG ID: 2
TIMESTAMP: 02:06:34

MONITOR MONCTON CENTER VHF 132.525 MHz
2025-10-19 02:07:43.650Z574026778308-8192
[ae2fa4]
88192A
- #MD/AA YQME2YA.AT1.88192A2188772821C4A360B1A1
[CPDLC/uplink from YQME2YA (Moncton Center) to 88192A]

MSG ID: 3
TIMESTAMP: 02:07:28

NEXT DATA AUTHORITY CDQX (Gander)
2025-10-19 02:08:03.620Z574026888908-8192
[ae2fa4]
88192A
- #MD/A0 YQME2YA.AFN/FMHRCH535,.88192A,,020750/FCAYQXD2YA,022EA
[AFN RESPONSE/uplink from YQME2YA (Moncton Center)]

TO AIRCRAFT:
ID: RCH535
REG: 88192A
TIMESTAMP: 02:07:50

CONTACT ADDRESS: YQXD2YA (Gander Domestic)
2025-10-19 02:08:53.643Z574027127608-8192
[ae2fa4]
88192A
- #MD/A0 YQXD2YA.AFN/FMHRCH535,.88192A,,020835/FAK0,CDQX/FARADS,0/FARATC,0,YQXD2YA2BB4
[AFN RESPONSE/uplink from YQXD2YA (Gander Domestic)]

TO AIRCRAFT:
ID: RCH535
REG: 88192A
TIMESTAMP: 02:08:35

LOGON ACKNOWLDGEMENT WITH CDQX (Gander) status 0
ADS-C status 0
CPDLC status 0 ADDRESS: YQXD2YA (Gander Domestic)
2025-10-19 02:24:07.654Z574031243308-8192
[ae2fa4]
88192A
- #MD/A6 YQXD2YA.ADS.88192A07010BA50D010F0110014784
[ADS-C/uplink from YQXD2YA (Gander Domestic) to 88192A]

PERIODIC CONTRACT REQUEST
CONTRACT NUM: 1
INTERVAL: 304 SEC
PREDICTED ROUTE: EVERY 1 REPORT(S)
AIR REFERENCE DATA: EVERY 1 REPORT(S)
METEO DATA: EVERY 1 REPORT(S)
2025-10-19 02:31:41.670Z574033428208-8192
[ae2fa4]
88192A
- #MD/AA YQXD2YA.CR1.88192A2009F7E8E1C4A36023D9
[CPDLC/uplink from YQXD2YA (Gander Domestic) to 88192A]

MSG ID: 0
TIMESTAMP: 02:31:31

CONNECTION REQUEST CDQX (Gander) LabelA
2025-10-19 02:31:57.634Z574033499708-8192
[ae2fa4]
88192A
- #MD/AA YQME2YA.AT1.88192A2209F7DD671E0CE89169061CA0B326
[CPDLC/uplink from YQME2YA (Moncton Center) to 88192A]

MSG ID: 4
TIMESTAMP: 02:31:31

CONTACT GANDER CENTER VHF 134.300 MHz
2025-10-19 02:32:45.662Z574033722608-8192
[ae2fa4]
88192A
- #MD/AA YQME2YA.AT1.88192A228A07E8402475
[CPDLC/uplink from YQME2YA (Moncton Center) to 88192A]

MSG ID: 5
TIMESTAMP: 02:32:31

END SERVICE
2025-10-19 02:32:59.655Z574033782608-8192
[ae2fa4]
88192A
- #MD/AA YQXD2YA.AT1.88192A208A0A92999065B24A
[CPDLC/uplink from YQXD2YA (Gander Domestic) to 88192A]

MSG ID: 1
TIMESTAMP: 02:32:42

PROCEED DIRECT TO 50' N 50' W
2025-10-19 02:36:55.661Z574034905108-8192
[ae2fa4]
88192A
- #MD/A6 YQME2YA.ADS.88192A01B88F
[ADS-C/uplink from YQME2YA (Moncton Center) to 88192A]

CANCEL ALL CONTRACTS AND TERMINATE CONNECTION
2025-10-19 02:37:11.680Z574034979308-8192
[ae2fa4]
88192A
- #MD/AA YQXD2YA.AT1.88192A210A4E2A526A48934D049A6820CE4106AD49F360D48B1104D8B4E9C18F150549E821CF9D1A4D29A821D089321A0873E754830EA20AF26A48411E0CE8916920893E6C5A7524C31477
[CPDLC/uplink from YQXD2YA (Gander Domestic) to 88192A]

MSG ID: 2
TIMESTAMP: 02:36:56

THIS IS AN AUTOMATED MESSAGE TO CONFIRM CPDLC CONTACT WITH GANDER DOMESTIC
2025-10-19 02:54:03.666Z574039579408-8192
[ae2fa4]
88192A
- #MD/AA YQXD2YA.AT1.88192A218B5CDD671E0CE891690516200E7F
[CPDLC/uplink from YQXD2YA (Gander Domestic) to 88192A]

MSG ID: 3
TIMESTAMP: 02:53:51

CONTACT GANDER CENTER VHF 125.900 MHz
2025-10-19 02:57:07.652Z574040426308-8192
[ae2fa4]
88192A
- #MD/AA YQXD2YA.AT1.88192A220B8E2821DAA3608B93
[CPDLC/uplink from YQXD2YA (Gander Domestic) to 88192A]

MSG ID: 4
TIMESTAMP: 02:56:56

NEXT DATA AUTHORITY CZQX (Gander)
2025-10-19 02:57:19.628Z574040482408-8192
[ae2fa4]
88192A
- #MD/A0 YQXD2YA.AFN/FMHRCH535,.88192A,,025708/FCAYQXE2YA,0EA05
[AFN RESPONSE/uplink from YQXD2YA (Gander Domestic)]

TO AIRCRAFT:
ID: RCH535
REG: 88192A
TIMESTAMP: 02:57:08

CONTACT ADDRESS: YQXE2YA (Gander Oceanic)
2025-10-19 02:58:15.690Z574040772008-8192
[ae2fa4]
88192A
- #MD/A0 YQXE2YA.AFN/FMHRCH535,.88192A,,025800/FAK0,CZQX/FARADS,0/FARATC,0,YQXE2YA1B91
[AFN RESPONSE/uplink from YQXE2YA (Gander Oceanic)]

TO AIRCRAFT:
ID: RCH535
REG: 88192A
TIMESTAMP: 02:58:00

LOGON ACKNOWLDGEMENT WITH CZQX (Gander) status 0
ADS-C status 0
CPDLC status 0 ADDRESS: YQXE2YA (Gander Oceanic)
2025-10-19 02:58:45.663Z574040905508-8192
[ae2fa4]
88192A
- #MD/A6 YQXE2YA.ADS.88192A07010BCC0C010D011001779A
[ADS-C/uplink from YQXE2YA (Gander Oceanic) to 88192A]

PERIODIC CONTRACT REQUEST
CONTRACT NUM: 1
INTERVAL: 832 SEC
FLIGHT ID: EVERY 1 REPORT(S)
PREDICTED ROUTE: EVERY 1 REPORT(S)
METEO DATA: EVERY 1 REPORT(S)
2025-10-19 03:01:27.678Z574041658408-8192
[ae2fa4]
88192A
- #MD/AA YQXE2YA.CR1.88192A200C1428E1DAA360747C
[CPDLC/uplink from YQXE2YA (Gander Oceanic) to 88192A]

MSG ID: 0
TIMESTAMP: 03:01:16

CONNECTION REQUEST CZQX (Gander) LabelA
2025-10-19 03:05:53.677Z574042938608-8192
[ae2fa4]
88192A
- #MD/AA YQXD2YA.AT1.88192A228C5AEA4521D486828D8414A24F413A7D740C59B55CCDA8DB1C
[CPDLC/uplink from YQXD2YA (Gander Domestic) to 88192A]

MSG ID: 5
TIMESTAMP: 03:05:43

CTC QX RDO NOW 135.35
2025-10-19 03:06:11.704Z574043029608-8192
[ae2fa4]
88192A
- #MD/A6 YQXE2YA.ADS.88192A080214BF75
[ADS-C/uplink from YQXE2YA (Gander Oceanic) to 88192A]

EVENT CONTRACT REQUEST
CONTRACT NUM: 2
REPORT WAYPOINT CHANGES
2025-10-19 03:17:01.687Z574046084508-8192
[ae2fa4]
88192A
- #MD/A6 YQXE2YA.ADS.88192A08030A1812B11320851FEF14BB30
[ADS-C/uplink from YQXE2YA (Gander Oceanic) to 88192A]

EVENT CONTRACT REQUEST
CONTRACT NUM: 3
REPORT WHEN LATERAL DEVIATION EXCEEDS: 3.000 NM
REPORT WHEN VERTICAL SPEED IS: < -5056 FT/MIN
REPORT WHEN ALTITUDE OUT OF RANGE: 32700-33300 FT
REPORT WAYPOINT CHANGES
2025-10-19 03:18:59.665Z574046630908-8192
[ae2fa4]
88192A
- #MD/AA YQXD2YA.AT1.88192A230D2C28406252
[CPDLC/uplink from YQXD2YA (Gander Domestic) to 88192A]

MSG ID: 6
TIMESTAMP: 03:18:48

END SERVICE
2025-10-19 03:20:15.690Z574047029708-8192
[ae2fa4]
88192A
- #MD/A6 YQXD2YA.ADS.88192A01B88F
[ADS-C/uplink from YQXD2YA (Gander Domestic) to 88192A]

CANCEL ALL CONTRACTS AND TERMINATE CONNECTION
2025-10-19 03:25:51.693Z574048642508-8192
[ae2fa4]
88192A
- #MD/AA YQXE2YA.AT1.88192A208D98EA4929C5A8826C1B082AD0992674B41122CC83650568332AC541527A066C1820A71618D386
[CPDLC/uplink from YQXE2YA (Gander Oceanic) to 88192A]

MSG ID: 1
TIMESTAMP: 03:25:35

SET MAX UPLINK DELAY VALUE TO 300 SEC
2025-10-19 03:28:29.682Z574049354508-8192
[ae2fa4]
88192A
- #MD/AA YQXE2YA.AT1.88192A210DC46240CD46
[CPDLC/uplink from YQXE2YA (Gander Oceanic) to 88192A]

MSG ID: 2
TIMESTAMP: 03:28:17

CONFIRM ASSIGNED ROUTE
2025-10-19 04:23:13.527Z574064816508-8192
[ae2fa4]
88192A
- #MD/AA YQXE2YA.AT1.88192AE18445C1002980895D
[CPDLC/uplink from YQXE2YA (Gander Oceanic) to 88192A]

MSG ID: 3
REF MSG: 2
TIMESTAMP: 04:23:01

UNABLE
DUE TO TRAFFIC
2025-10-19 04:35:27.548Z574068704508-8192
[ae2fa4]
88192A
- #MD/AA YQXE2YA.AT1.88192A221233E822C78F60C816
[CPDLC/uplink from YQXE2YA (Gander Oceanic) to 88192A]

MSG ID: 4
TIMESTAMP: 04:35:15

NEXT DATA AUTHORITY EGGX (Shanwick Oceanic)
2025-10-19 04:35:39.504Z574068766108-8192
[ae2fa4]
88192A
- #MD/A0 YQXE2YA.AFN/FMHRCH535,.88192A,,043526/FCAPIKCPYA,0BBE4
[AFN RESPONSE/uplink from YQXE2YA (Gander Oceanic)]

TO AIRCRAFT:
ID: RCH535
REG: 88192A
TIMESTAMP: 04:35:26

CONTACT ADDRESS: PIKCPYA (Shanwick Oceanic)
2025-10-19 04:36:11.565Z574068944408-8192
[ae2fa4]
88192A
- #MD/A0 PIKCPYA.AFN/FMHRCH535,.88192A,,043556/FAK0,EGGX/FARADS,0/FARATC,0,PIKCPYAB35A
[AFN RESPONSE/uplink from PIKCPYA (Shanwick Oceanic)]

TO AIRCRAFT:
ID: RCH535
REG: 88192A
TIMESTAMP: 04:35:56

LOGON ACKNOWLDGEMENT WITH EGGX (Shanwick Oceanic) status 0
ADS-C status 0
CPDLC status 0 ADDRESS: PIKCPYA (Shanwick Oceanic)
2025-10-19 04:36:35.518Z574069068808-8192
[ae2fa4]
88192A
- #MD/A6 PIKCPYA.ADS.88192A07010BCC0C010D011001779A
[ADS-C/uplink from PIKCPYA (Shanwick Oceanic) to 88192A]

PERIODIC CONTRACT REQUEST
CONTRACT NUM: 1
INTERVAL: 832 SEC
FLIGHT ID: EVERY 1 REPORT(S)
PREDICTED ROUTE: EVERY 1 REPORT(S)
METEO DATA: EVERY 1 REPORT(S)
2025-10-19 04:36:47.509Z574069131708-8192
[ae2fa4]
88192A
- #MD/A6 PIKCPYA.ADS.88192A080214BF75
[ADS-C/uplink from PIKCPYA (Shanwick Oceanic) to 88192A]

EVENT CONTRACT REQUEST
CONTRACT NUM: 2
REPORT WAYPOINT CHANGES
2025-10-19 04:41:55.534Z574070823908-8192
[ae2fa4]
88192A
- #MD/AA PIKCPYA.CR1.88192A20129A68E2C78F60ED01
[CPDLC/uplink from PIKCPYA (Shanwick Oceanic) to 88192A]

MSG ID: 0
TIMESTAMP: 04:41:41

CONNECTION REQUEST EGGX (Shanwick Oceanic) LabelA
2025-10-19 04:44:55.527Z574071865308-8192
[ae2fa4]
88192A
- #MD/AA YQXE2YA.AT1.88192A2292CA9DC9DD29C8833A9449E015DEC253
[CPDLC/uplink from YQXE2YA (Gander Oceanic) to 88192A]

MSG ID: 5
TIMESTAMP: 04:44:42

AT 04:59 CONTACT SHANRDO CENTER HF 5649 kHz
2025-10-19 04:53:23.534Z574074734608-8192
[ae2fa4]
88192A
- #MD/A6 PIKCPYA.ADS.88192A08030A1812B11320851FEF14BB30
[ADS-C/uplink from PIKCPYA (Shanwick Oceanic) to 88192A]

EVENT CONTRACT REQUEST
CONTRACT NUM: 3
REPORT WHEN LATERAL DEVIATION EXCEEDS: 3.000 NM
REPORT WHEN VERTICAL SPEED IS: < -5056 FT/MIN
REPORT WHEN ALTITUDE OUT OF RANGE: 32700-33300 FT
REPORT WAYPOINT CHANGES
2025-10-19 04:57:09.541Z574076015808-8192
[ae2fa4]
88192A
- #MD/AA YQXE2YA.AT1.88192A23138E28400853
[CPDLC/uplink from YQXE2YA (Gander Oceanic) to 88192A]

MSG ID: 6
TIMESTAMP: 04:56:56

END SERVICE
2025-10-19 05:03:27.513Z574078259308-8192
[ae2fa4]
88192A
- #MD/AA PIKCPYA.AT1.88192A2094332A4929C5A8826C1B082AD0992674B41122CC83650568332AC541527A066C1820A71618399F
[CPDLC/uplink from PIKCPYA (Shanwick Oceanic) to 88192A]

MSG ID: 1
TIMESTAMP: 05:03:12

SET MAX UPLINK DELAY VALUE TO 300 SEC
2025-10-19 05:05:25.517Z574078982208-8192
[ae2fa4]
88192A
- #MD/A6 YQXE2YA.ADS.88192A07040B000C000D010E0110008F57
[ADS-C/uplink from YQXE2YA (Gander Oceanic) to 88192A]

PERIODIC CONTRACT REQUEST
CONTRACT NUM: 4
ON DEMAND
FLIGHT ID: EVERY 0 REPORT(S)
PREDICTED ROUTE: EVERY 1 REPORT(S)
EARTH REFERENCE DATA: EVERY 1 REPORT(S)
METEO DATA: EVERY 0 REPORT(S)
2025-10-19 05:06:07.535Z574079233408-8192
[ae2fa4]
88192A
- #MD/AA PIKCPYA.AT1.88192A21145D6240C33E
[CPDLC/uplink from PIKCPYA (Shanwick Oceanic) to 88192A]

MSG ID: 2
TIMESTAMP: 05:05:53

CONFIRM ASSIGNED ROUTE
2025-10-19 05:08:01.530Z574079918608-8192
[ae2fa4]
88192A
- #MD/A6 YQXE2YA.ADS.88192A01B88F
[ADS-C/uplink from YQXE2YA (Gander Oceanic) to 88192A]

CANCEL ALL CONTRACTS AND TERMINATE CONNECTION
2025-10-19 05:08:15.514Z574079997908-8192
[ae2fa4]
88192A
- #MD/AA PIKCPYA.AT1.88192A21947DE82650A13C69C4
[CPDLC/uplink from PIKCPYA (Shanwick Oceanic) to 88192A]

MSG ID: 3
TIMESTAMP: 05:07:55

NEXT DATA AUTHORITY LPPO (Santa Maria Oceanic)
2025-10-19 05:08:27.525Z574080068408-8192
[ae2fa4]
88192A
- #MD/A0 PIKCPYA.AFN/FMHRCH535,.88192A,,050814/FCASMACAYA,0290B
[AFN RESPONSE/uplink from PIKCPYA (Shanwick Oceanic)]

TO AIRCRAFT:
ID: RCH535
REG: 88192A
TIMESTAMP: 05:08:14

CONTACT ADDRESS: SMACAYA (Santa Maria Oceanic)
2025-10-19 05:09:05.548Z574080312108-8192
[ae2fa4]
88192A
- #MD/A0 SMACAYA.AFN/FMHRCH535,.88192A,,050849/FAK0,LPPO/FARADS,0/FARATC,0A570
[AFN RESPONSE/uplink from SMACAYA (Santa Maria Oceanic)]

TO AIRCRAFT:
ID: RCH535
REG: 88192A
TIMESTAMP: 05:08:49

LOGON ACKNOWLDGEMENT WITH LPPO (Santa Maria Oceanic) status 0
ADS-C status 0
CPDLC status 0
2025-10-19 05:10:03.550Z574080681608-8192
[ae2fa4]
88192A
- #MD/A6 SMACAYA.ADS.88192A07010BC80C000D010E0010010F0115000108021460C3
[ADS-C/uplink from SMACAYA (Santa Maria Oceanic) to 88192A]

PERIODIC CONTRACT REQUEST
CONTRACT NUM: 1
INTERVAL: 576 SEC
FLIGHT ID: EVERY 0 REPORT(S)
PREDICTED ROUTE: EVERY 1 REPORT(S)
EARTH REFERENCE DATA: EVERY 0 REPORT(S)
METEO DATA: EVERY 1 REPORT(S)
AIR REFERENCE DATA: EVERY 1 REPORT(S)
AIRCRAFT INTENT DATA:
EVERY 0 REPORT(S)
PROJECTION TIME: 1 MINUTES

EVENT CONTRACT REQUEST
CONTRACT NUM: 2
REPORT WAYPOINT CHANGES
2025-10-19 05:10:13.544Z574080745108-8192
[ae2fa4]
88192A
- #MD/AA SMACAYA.CR1.88192A20149D28E650A13C1CC5
[CPDLC/uplink from SMACAYA (Santa Maria Oceanic) to 88192A]

MSG ID: 0
TIMESTAMP: 05:09:52

CONNECTION REQUEST LPPO (Santa Maria Oceanic) LabelA
2025-10-19 05:23:17.521Z574085901008-8192
[ae2fa4]
88192A
- #MD/A6 SMACAYA.ADS.88192A080313206C2008140A1807040B000D010F01CD59
[ADS-C/uplink from SMACAYA (Santa Maria Oceanic) to 88192A]

EVENT CONTRACT REQUEST
CONTRACT NUM: 3
REPORT WHEN ALTITUDE OUT OF RANGE: 32800-33200 FT
REPORT WAYPOINT CHANGES
REPORT WHEN LATERAL DEVIATION EXCEEDS: 3.000 NM

PERIODIC CONTRACT REQUEST
CONTRACT NUM: 4
ON DEMAND
PREDICTED ROUTE: EVERY 1 REPORT(S)
AIR REFERENCE DATA: EVERY 1 REPORT(S)
2025-10-19 05:29:41.529Z574088556108-8192
[ae2fa4]
88192A
- #MD/AA PIKCPYA.AT1.88192A2215D6E84064A0
[CPDLC/uplink from PIKCPYA (Shanwick Oceanic) to 88192A]

MSG ID: 4
TIMESTAMP: 05:29:27

END SERVICE
2025-10-19 05:33:37.529Z574090348608-8192
[ae2fa4]
88192A
- #MD/AA SMACAYA.AT1.88192A209615AA4929C5A8826C1B082AD0992674B41122CC83650568332AC541527A066C1820A71618D29B
[CPDLC/uplink from SMACAYA (Santa Maria Oceanic) to 88192A]

MSG ID: 1
TIMESTAMP: 05:33:22

SET MAX UPLINK DELAY VALUE TO 300 SEC
2025-10-19 05:36:05.540Z574091496908-8192
[ae2fa4]
88192A
- #MD/AA SMACAYA.AT1.88192A21163D2240B8F1
[CPDLC/uplink from SMACAYA (Santa Maria Oceanic) to 88192A]

MSG ID: 2
TIMESTAMP: 05:35:52

CONFIRM ASSIGNED ROUTE
2025-10-19 05:45:11.533Z574095526608-8192
[ae2fa4]
88192A
- #MD/A6 PIKCPYA.ADS.88192A08041415D3
[ADS-C/uplink from PIKCPYA (Shanwick Oceanic) to 88192A]

EVENT CONTRACT REQUEST
CONTRACT NUM: 4
REPORT WAYPOINT CHANGES
2025-10-19 05:48:31.531Z574097039008-8192
[ae2fa4]
88192A
- #MD/A6 PIKCPYA.ADS.88192A01B88F
[ADS-C/uplink from PIKCPYA (Shanwick Oceanic) to 88192A]

CANCEL ALL CONTRACTS AND TERMINATE CONNECTION
2025-10-19 06:03:27.534Z574103582008-8192
[ae2fa4]
88192A
- #MDWXR/ID88192A,RCH535,PES05TH04291/MR2,240/MTLERT,0739,TAF LERT 190739Z VRB06KT 9999 SCT030 QNH3002INS T20C-AUTO RESPONSE BASED ON AVAILABLE DATA-CONTACT C2 AGENCY FOR ADDITIONAL INFO09C4
[WEATHER REPORT/uplink]

ACARS ADDR: 88192A
FLIGHT ID: RCH535
MISSION NO: PES05TH04291
MESSAGE REF: 2,240

MET REPORT FOR: LERT (NS Rota)
AT TIME: 07:39

TERMINAL AIR FORECAST FOR LERT (NS Rota). ISSUED FOR 0739Z ON THE 19th. WIND VARIABLE AT 6 KNOTS. VISIBILITY 10 KM OR MORE. SCATTERED CLOUDS AT 3000 FEET. QNH 30.02 INCHES. TEMPERATURE 20 DEG C.
2025-10-19 06:10:47.539Z574106716308-8192
[ae2fa4]
88192A
- #MD/AA SMACAYA.AT1.88192A2198A89D0012AD
[CPDLC/uplink from SMACAYA (Santa Maria Oceanic) to 88192A]

MSG ID: 3
TIMESTAMP: 06:10:34

RESUME NORMAL SPEED
2025-10-19 06:32:43.653Z574115511508-8192
[ae2fa4]
88192A
- #MD/AA SMACAYA.AT1.88192A221A075D532850A816FEA0A605
[CPDLC/uplink from SMACAYA (Santa Maria Oceanic) to 88192A]

MSG ID: 4
TIMESTAMP: 06:32:29

CONTACT LPPT CENTER VHF 131.325 MHz
2025-10-19 06:34:43.639Z574116278008-8192
[ae2fa4]
88192A
- #MD/AA SMACAYA.AT1.88192A229A276840A28C
[CPDLC/uplink from SMACAYA (Santa Maria Oceanic) to 88192A]

MSG ID: 5
TIMESTAMP: 06:34:29

END SERVICE
2025-10-19 06:46:46.437Z574120670008-8192
[ae2fa4]
88192A
- #MD/A6 SMACAYA.ADS.88192A01B88F
[ADS-C/uplink from SMACAYA (Santa Maria Oceanic) to 88192A]

CANCEL ALL CONTRACTS AND TERMINATE CONNECTION

Glossary: ATSU = air traffic service unit; downlink = message from aircraft to ATSU; uplink: message from ATSU to aircraft