10027.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft B-325J + N516DN + flight APZ101 + KAL017
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
FMC = Flight Management Computer
FMS = Flight Management System
• DELAY is a critical procedure, designed to prevent pilots
from acting on any old CPDLC messages
that might have been delayed in the network
The most serious of such cases would be
the pilot executing a clearance that was no longer valid
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

8106.9 kHz SWA Athens Meteo, Greece

8424.0 kHz SVO Olympia Radio, Athens, Greece

8424.0 kHz SVO Olympia Radio, Athens, Greece

4610.0 kHz GYA Royal Navy London, United Kingdom

10084.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft B-5931 + CC-BGL + UK32015 + flight 95
The weight/balance sheet is incomplete ...
DOW = Dry Operating Weight
LWMAC = Landing Weight Mean Aerodynamic Chord
SI = Supplementary Information
TOMAC = Take-Off Mean Aerodynamic Chord
ZFMAC = Zero Fuel Mean Aerodynamic Chord
• Engine Cruise Report ZSHC - NZAA ...
= collection of data over a period of time
in which the aircraft met the appropriate stability criteria
If no stability is detected, then the report
ends with NO STABLE FRAME CONDITION
• Aircraft in-flight performance parameters such as OIT = Oil Temperature are explained e.g. here
• The yellow table below shows a typical parameters list ...
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

10084.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft N626UP + RA73704 + 9M-XBG + flight AMU985 + SIA247 + UAL839
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
Solar cycle maximum - and the ionosphere going crazy:
Fault report downlink from a UUEE - UMKK Baltic Sea hop ... via Auckland!
CFB = Centralized Fault Book
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
GPSSU = Global Positioning System Sensor Unit
IR = Inertial Reference
MMR = Multi-Mode Receiver

518.0 kHz 9WW21 Miri Radio, Sarawak, Malaysia
Totally outdated meteorological warnings of several months ago ...
Alamak! Tak boleh tahan lah!

16559.0 kHz XSG Shanghai Radio, China
CMA = China Meteorological Administration

5655.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft HS-TEW + 9V-SHH + 9V-SHU + 9V-SJI + 9V-SMZ + flight SIA352
ETO = Estimated Time of Overfly
OCCS = Operations Control Centre Singapore
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response
FCA = Facilities Contact Advisory
FCO ADS = Facilities Contact ADS-C
FCO ATC = Facilities Contact CPDLC
FMH = Facilities Message Header = Flight Number
FPO = Facilities Current Position
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

5655.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft 9V-SHR + 9V-SHU + 9V-SMZ + flight TG0318
Code figures for WSSS runways braking action - see e.g. here
RSCD = Runway Surface Condition
RWYCC = Runway Condition Code
TI2 = Terminal Information Request
• The TP4 (= Transport Protocol Class 4) message
notifies the pilot of an ATSU identifier
• The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus data for navigational accuracy
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

4209.5 kHz XVG Hai Phong Radio, Viet Nam

518.0 kHz XYM Myeik Radio, Myanmar

518.0 kHz PKX Jakarta Radio, Indonesia

518.0 kHz 9VG Singapore Radio, Singapore
Ships piloting and routing ...
DFT = Draft
DWT = Dead Weight Tonnage
OFB = One Fathom Bank = Sandbank Shoal at N0305 E10040
1.8288 metres = 1 fathom = 2 yards = 6 feet = 18 hands = 72 inches ...
= 30 ears = 60 noses = 180 teeth (sorry, just joking ;-))
SPOCC = Singapore Port Operations Control Centre
TSS = Traffic Separation Scheme

21997.0 kHz H13 HFDL Santa Cruz Air, Bolivia, + aircraft CC-BDC + PT-TYP + ZS-SXJ + flight ARG130 + LAN770
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
AMDAR = Aircraft Meteorological Data Relay FACT - SBGR
ATSU = Air Traffic Service Unit
CFB = Centralized Fault Book
DAR = Data Access Recorder
DFB = Digital Flight Book
FCNT = (DAR) Frame Counter
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
ISFC = Indicated Specific Fuel Consumption

21997.0 kHz H13 HFDL Santa Cruz Air, Bolivia, + aircraft CC-BDC + N856GT + ZS-SXJ + flight IBE685
KMIA - SBEG cruise parameters ...
CFB = Centralized Fault Book
ECS = Environmental Control System
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response
FCO ADS = Facilities Contact ADS-C
FCO ATC = Facilities Contact CPDLC
FMH = Facilities Message Header = Flight Number
FPO = Facilities Current Position
• Engine Cruise Report FACT - SBGR ...
= collection of data over a period of time
in which the aircraft met the appropriate stability criteria
If no stability is detected, then the report
ends with NO STABLE FRAME CONDITION
• Aircraft in-flight performance parameters such as OIT = Oil Temperature are explained e.g. here
• The yellow table below shows a typical parameters list ...

8582.0 kHz PWZ Brazilian Navy Rio de Janeiro, Brazil
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

8582.0 kHz PWZ Brazilian Navy Rio de Janeiro, Brazil

17958.0 kHz H10 HFDL Muan Air, South Korea, + aircraft B-30CY + B-30DT + B-300D + B-2415 + B-6006 + B-18919 + JA220A + flight ANA67 + CES5464
ADIRU = Air Data Inertial Reference Unit
AFS = Auto Flight System
AI = Arrival Information
CFB = Centralized Fault Book
DI = Departure Information
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
GC = Ground Connections
LID = Landing Information Delivery
PD = Profile Descent
PDC = Pre-Departure Clearance
TI2 = Terminal Information Request
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

11312.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft B-1430 + ET-AYC + HL7624 + N526DN + 9V-SGE + flight FDX598
Solar cycle maximum - and the ionosphere going crazy:
ADS-C message uplink for a FACT -HAAB Southeast African flight ... via Hawaii!
CFD = Centralized Fault Data
• DELAY is a critical procedure, designed to prevent pilots
from acting on any old CPDLC messages
that might have been delayed in the network
The most serious of such cases would be
the pilot executing a clearance that was no longer valid
• The TP4 (= Transport Protocol Class 4) message
notifies the pilot of an ATSU identifier
• The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

17958.0 kHz H10 HFDL Muan Air, South Korea, + aircraft B-325M + B-2412 + B-6011 + B-8325 + B-8653 + JA207P + flight CCA135 + CES519
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
Enroute weather ZUCK - ZSNB and ZGHA - ZSCG ...
AGM = Miscellaneous Air/Ground Message
DFB = Digital Flight Book
LGTP = Light Plus Turbulence = relatively greater intensity

8425.5 kHz XSG Shanghai Radio, China
Characters in brackets denote the Latin alphabet
The four-figure groups without brackets
are Chinese ideographs
Presumably local time used here since received at 1350 UTC ...

4210.5 (not 4209.5!) kHz XSQ Guangzhou Radio, China
Characters in brackets denote the Latin alphabet
The four-figure groups without brackets
are Chinese ideographs
Presumably local time used here since received at 1320 UTC ...
N/W = Navigational Warning

15025.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft A6-BLN + A6-EIM + B-32GY + B-325J + B-2094 + D-AXGF + OH-LWT + OY-KAR + VT-NAC + ZS-SZI + flight SU2137
POSREP KIAD - VIDP ...
CFD = Centralized Fault Data
REQPWI = Predicted Wind Request for FL 400 380 360 340
TS = Time Stamp
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response
FCA = Facilities Contact Advisory
FMH = Facilities Message Header = Flight Number
• Engine Cruise Report ENTC - ENGM ...
= collection of data over a period of time
in which the aircraft met the appropriate stability criteria
If no stability is detected, then the report
ends with NO STABLE FRAME CONDITION
• Aircraft in-flight performance parameters such as OIT = Oil Temperature are explained e.g. here
• The yellow table below shows a typical parameters list ...
Note that in this message, however, the text is not table-formatted;
anyway, standard row identifiers such as CC C0 C1 CE ... can be easily identified after the slash ...
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

15025.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft CS-TSI + RA73129 + 9V-SGD + flight ITY610 + KZR716
Code figures for LPPD runways braking action - see e.g. here
TI2 = Terminal Information Request
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
TDZ = Touchdown Zone
TI2 = Terminal Information Request
• DELAY is a critical procedure, designed to prevent pilots
from acting on any old CPDLC messages
that might have been delayed in the network
The most serious of such cases would be
the pilot executing a clearance that was no longer valid
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

15025.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft A7-ANP + EK-FOC + N519DN + N742AM + SE-RSD + flight LW05DG
DT = Destination, followed by the runway number
FMC = Flight Management Computer
FMS = Flight Management System
FN = Flight Number
TS = Time Stamp
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
• The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus data for navigational accuracy
• PRG = Flight Progress Report sent shortly
(i.e. 1 hour - 10 minutes) before arrival,
typically including destination airport followed by
estimated runway for landing, estimated FOB, ETA, and FN
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

11086.5 kHz GYA Royal Navy London, United Kingdom

16850.3 kHz XSQ Guangzhou Radio, China
Characters in brackets denote the Latin alphabet
The four-figure groups without brackets
are Chinese ideographs
What those megalomaniac Communist Chinese call "Zengmu Ansha Reef"
is in fact James Shoal, recognized by the Brits in the early 19th Century
and listed on the British Admiralty Chart in the 1870s (!).
Needless to say, located a mere 83 kilometres off Bintulu in Sarawak,
BETING SERUPAI belongs perfectly to the continental shelf and EEZ of MALAYSIA,
and has never repeat NEVER been a territory of Communist "China"
that is more than 1,800 kilometres repeat
MORE THAN ONE THOUSAND EIGHT HUNDRED KILOMETRES away!
Alamak!! Tak boleh tahan lah!!!

20268.0 kHz Digital data station

11387.0 kHz H04 HFDL Riverhead Air NY, United States of America, + flight ACA36 + LAN532

518.0 kHz NMQ United States Coast Guard Long Beach CA, United States of America
BNM = Broadcast Notice to Mariners
IAW = In Accordance With
LA = Los Angeles
LB = Long Beach
PMSR = Point Mugu Sea Range
SFB = Space Force Base

17916.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft B-MCA + B-32AG + LV-KAO + PR-TYU + SU-GEE + flight OZ0755
Solar cycle maximum - and the ionosphere going crazy:
Wind data request downlink from a ORER - HECA Middle East hop ... via Auckland!
AGM = Miscellaneous Air/Ground Message
REQPWI = Predicted Wind Request for FL 380
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response
FMH = Facilities Message Header = Flight Number
• DELAY is a critical procedure, designed to prevent pilots
from acting on any old CPDLC messages
that might have been delayed in the network
The most serious of such cases would be
the pilot executing a clearance that was no longer valid
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

17916.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft B-MBB + B-32AG + F-HUVM + flight AIC311
Code figures for NZAA runways braking action - see e.g. here
AGM = Miscellaneous Air/Ground Message
RWYCC = Runway Condition Code
TI2 = Terminal Information Request
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
• The TP4 (= Transport Protocol Class 4) message
notifies the pilot of an ATSU identifier
• The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

8416.5 kHz NMO United States Coast Guard Honolulu, Hawaii

9165.0 kHz HLL Soul Meteo, South Korea
GloSea = Global Seasonal Forecasting System

3585.0 kHz HLL5 Soul Meteo, South Korea

8942.0 kHz H07 HFDL Shannon Air, Ireland, + aircraft CN-RHA + EC-OAY + EI-TYB + ET-AUA + RA73155 + SU-GEB + 5A-WLA + flight VIR359
The INRANGE message announces the aircraft being within VHF range of the DS
XML-formatted Airbus A350-900 failure message ... but the Russians don't have MIAM!
CDSS = Cockpit Door Surveillance System
CDSU = Cockpit Door Surveillance Unit
CFB = Centralized Fault Book
CMS = Cabin Management System
DS = Destination Airport
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
MIAM = Media Independent Aircraft Message
MSN = Manufacturer's Serial Number
RTR = Real-Time Report
WAI = Wing Anti Ice
• The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

4209.5 kHz XVG Hai Phong Radio, Viet Nam

21997.0 kHz H13 HFDL Santa Cruz Air, Bolivia, + aircraft CS-TOO + EI-HJP + HZ-NS76 + N843FD + PK-GMQ + PR-TYM + PR-TYP + PR-YYE + PR-YYJ + flight TAM365
Solar cycle maximum - and the ionosphere going crazy:
Cruise parameters and weather request downlink from a OERK - HAAB Red Sea hop ... via Santa Cruz!
Fly Bondi LV-KEG is ex Garuda PK-GMQ
Avionics still programmed on the latter ...
POSREP = POS, WP, ATO, FL, next+1 WP, ETO, next+2 WP,
ETO, temperature, wind, FOB or SOG, time stamp, date, HEX serial
AFS = Auto Flight System
CCC = Core Compartment Cooling
CFB = Centralized Fault Book
DA = Departure Airport
DM = Time Stamp
DRINFO = Door Closure Time
DS = Destination Airport
ECU = Electronic Control Unit
EFCS = Electronic Flight Control System
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
RA = Radio Altimeter
WHC = Windshield Heat Computer
WN = Warning Number, followed by the Date-Time Group

21997.0 kHz H13 HFDL Santa Cruz Air, Bolivia, + aircraft EC-NGN + N583UP + PR-TYM + PR-YYJ + PS-AJB + ZS-SXM + flight UAL29
Perfect OOOI ...
AMDAR = Aircraft Meteorological Data Relay SBGR - FAOR
CFD = Centralized Fault Data
DFB = Digital Flight Book
REQPWI = Predicted Wind Request for FL 390 370 350
RET = Rapid Exit Taxiway
TI2 = Terminal Information Request
• The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus data for navigational accuracy
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

17958.0 kHz H10 HFDL Muan Air, South Korea, + aircraft B-32AA + B-322Q + B-324J + B-2411 + B-6936 + JA214A + JA802A + JA807A + JA818P + flight CES230
AGM = Miscellaneous Air/Ground Message
ERCT = Estimated Reaching Cruise Time
LGTM = Light Minus Turbulence = relatively weaker intensity
LID = Landing Information Delivery
OTP = On Top
PDC = Pre-Departure Clearance
SR = Sunrise
SS = Sunset
• The TP4 (= Transport Protocol Class 4) message
notifies the pilot of an ATSU identifier
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

8417.0 kHz RMP Commonwealth of Independent States Navy Kaliningrad, Russian Federation

12629.3 kHz XSQ Guangzhou Radio, China
CMA = China Meteorological Administration
MSA = Maritime Safety Administration

11306.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-5943 + B-5966 + B-6637 + B-8561 + N615FE + JA902P + flight CES557
Enroute weather NZAA - ZSHC ...
The weight - balance sheet is incomplete ...
AGM = Miscellaneous Air/Ground Message
CFB = Centralized Fault Book
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
MEL = Minimum Equipment List
REQPRG = Request Flight Progress Report
SDU = Satellite Data Unit
ZFCG = Zero Fuel Centre of Gravity
• The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus data for navigational accuracy
• The Waypoint Change Event is triggered by a change
made to the Next, or the Next-plus-one waypoint
This change normally occurs due to normal waypoint sequencing by the FMS
The Next or Next-plus-one waypoint can be either an ATS waypoint or a pilot inserted waypoint
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

17958.0 kHz H10 HFDL Muan Air, South Korea, + aircraft A6-EUT + B-30FR + B-32HW + B-2093 + B-2420 + JA901P + flight APJ809
AGM = Miscellaneous Air/Ground Message
CFB = Centralized Fault Book
ECS = Environmental Control System
LGTM = Light Minus Turbulence = relatively weaker intensity
LID = Landing Information Delivery
PDC = Pre-Departure Clearance
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

8936.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft B-325N + C-FVND + JA875A + N502DN + N618FE + N29989 + flight ANA126
PMDY is an ETOPS emergency alternate airport
for trans-Pacific flights with RWY 6/24 = 2377 metres ...
AGM = Miscellaneous Air/Ground Message
DFD = Digital Flight Data
EEP = ETOPS Entry Point
OMC = Operations Management Center
• The Waypoint Change Event is triggered by a change
made to the Next, or the Next-plus-one waypoint
This change normally occurs due to normal waypoint sequencing by the FMS
The Next or Next-plus-one waypoint can be either an ATS waypoint or a pilot inserted waypoint
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

8936.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft B-32KM + N888FD + flight UAE43P + UAE434
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
TI2 = Terminal Information Request
• The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus data for navigational accuracy
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

8936.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft B-322Q + B-6673 + HL7639 + N574FE + N885FD + SE-RSD + flight MM0140
CFD = Centralized Fault Data
DFD = Digital Flight Data
LID = Landing Information Delivery
PDC = Pre-Departure Clearance
REQPRG = Request Flight Progress Report
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
• The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

8416.5 kHz L2C Argentinian Coast Guard Buenos Aires, Argentina

7898.3 kHz Digital data station

9982.5 kHz KVM70 Honolulu Meteo, Hawaii
NCEP = National Centers for Environmental Prediction

9982.5 kHz KVM70 Honolulu Meteo, Hawaii
Transmission cut off ...
NCEP = National Centers for Environmental Prediction
NHC = National Hurricane Center
OPC = Ocean Prediction Center
WPC = Weather Prediction Center

6661.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft A7-ANA + CN-ROJ + G-VPIE + N126FE + N574FE + XA-ADC + flight FDX120
MMMX - LIRF cruise data ...
The first group is the latitude
The second group is the longitude
and its four last figures is the time in hours and minutes
The third group is the FL
DFB = Digital Flight Book
TI2 = Terminal Information Request
• The TP4 (= Transport Protocol Class 4) message
notifies the pilot of an ATSU identifier
• The Waypoint Change Event is triggered by a change
made to the Next, or the Next-plus-one waypoint
This change normally occurs due to normal waypoint sequencing by the FMS
The Next or Next-plus-one waypoint can be either an ATS waypoint or a pilot inserted waypoint
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

518.0 kHz Gislovshammar Radio, Sweden

518.0 kHz GCC Cullercoats Radio, United Kingdom
ANMB = Admiralty Notices to Mariners Bulletin

518.0 kHz 9AS Split Radio, Croatia

518.0 kHz PBK Netherlands Coast Guard Ijmuiden, Netherlands
EEZ = Exclusive Economic Zone

8481.8 kHz 5415 Digital data station

518.0 kHz XSG Shanghai Radio, China
MSA = Maritime Safety Administration

518.0 kHz VRX Hong Kong Radio, China
Nice to see VRX uses intentionally
the internationally recognized British names
for those island groups in the South China Sea
and not those absurd fantasy names
applied by aggressive Communist China
that is going to grab every shoal all the way down
to the shores of Melayu dan Singapura -
more than 1,800 kilometres away from Hainan!
Alamak!! Tak boleh tahan lah!!!

8942.0 kHz H07 HFDL Shannon Air, Ireland, + aircraft B-307A enroute ZSPD - EDFFF
go2MONITOR's superb Result Viewer allows easy selection of MIAM
out of hundreds of decoded messages by means of advanced filter settings ...
go2MONITOR perfectly re-assembles and decodes MIAM CORE data ...
These are often messages in Airbus' XML format
ADIRU = Air Data Inertial Reference Unit
AESS = Aircraft Environment Surveillance System
CMS = Cabin Management System
ISIS = Integrated Standby Instrument System
MIAM = Media Independent Aircraft Message
MSN = Manufacturer's Serial Number
PDU = Pilot Display Unit
RTR = Real-Time Report

8942.0 kHz H07 HFDL Shannon Air, Ireland, + aircraft B-326Y enroute EGKK - ZBAA
go2MONITOR's superb Result Viewer allows easy selection of MIAM
out of hundreds of decoded messages by means of advanced filter settings ...
go2MONITOR perfectly re-assembles and decodes MIAM CORE data ...
These are often messages in Airbus' XML format
AAP = Aft Attendant Panel
CIDS = Cabin Intercommunication Data System
CMS = Cabin Management System
MIAM = Media Independent Aircraft Message
MSN = Manufacturer's Serial Number
PDU = Pilot Display Unit
RTR = Real-Time Report

8942.0 kHz H07 HFDL Shannon Air, Ireland, + aircraft A6-BNE + F-HTYH + N612UP + flight CMB141
• DELAY is a critical procedure, designed to prevent pilots
from acting on any old CPDLC messages
that might have been delayed in the network
The most serious of such cases would be
the pilot executing a clearance that was no longer valid
• The TP4 (= Transport Protocol Class 4) message
notifies the pilot of an ATSU identifier
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

8942.0 kHz H07 HFDL Shannon Air, Ireland, + aircraft CN-ROU + EC-OGC + G-VDOT + N510DN + N612UP + OY-KAS + flight CRL744
AGM = Miscellaneous Air/Ground Message
CCO = Operations Control Centre
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

8942.0 kHz H07 HFDL Shannon Air, Ireland, + aircraft A6-BNE + CN-ROU + D-AIVB + G-VDOT + JY-AYU + N612UP + N848FD + SE-DMR + YR-KID + flight UAE46
AGM = Miscellaneous Air/Ground Message
CFB = Centralized Fault Book
DB = Dash Board
EOR = End of Report
FDE = Fault Detection and Exclusion
FMS = Flight Management System
RESPWI/AC = FMS downlink acceptance and insertion of PWI = Predicted Wind uplink data
TS = Time Stamp
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response
FCA = Facilities Contact Advisory
FMH = Facilities Message Header = Flight Number
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
• The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus data for navigational accuracy
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

17916.0 kHz H13 HFDL Santa Cruz Air, Bolivia, + aircraft EC-ODP + HL8701 + JA811A + XA-AMX + XA-MFG + flight LRC626
EC-ODP is a daily shuttle service SCEL - SKBO - SCEL
by Wamos Air on wet lease for LATAM Airlines ...
MMMX - SBGR and RJAA - MMMX cruise data ...
The first group is the latitude
The second group is the longitude
and its four last figures is the time in hours and minutes
The third group is the FL
DFB = Digital Flight Book
LDA = Landing Distance Available = treshold to treshold = TORA plus the treshold displacement
PBB = Passenger Boarding Bridge
PMS = Pavement Management System
TORA = Take Off Run Available
VDGS = Visual Docking Guidance System
• Engine Cruise Report SCEL - SKBO ...
= collection of data over a period of time
in which the aircraft met the appropriate stability criteria
If no stability is detected, then the report
ends with NO STABLE FRAME CONDITION
• Aircraft in-flight performance parameters such as OIT = Oil Temperature are explained e.g. here
• The yellow table below shows a typical parameters list ...

13351.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft B-1297 + RA73118 + flight UAE96R
Solar cycle maximum - and the ionosphere going crazy:
Cruise parameters downlink from a UUEE - UIII Central Asian flight ... via Auckland!
RA73118 is the "re-registered" (read: seized) Aeroflot Boeing B737-800 aircraft
leased from ACS (Aero Capital Solutions) Austin TX, United States of America (!)
and originally registered as VP-BZA in Bermuda ...
AOA = Angle of Attack
DFB = Digital Flight Book
GLS = GBAS (Ground-Based Augmentation System) Landing System
IVV = Inertial Vertical Speed
POX = Position Report
VAC = Vertical Acceleration
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

6559.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft HL7623 + HL7634 + JA13KZ + JA806A + N608UP + XA-DHM + XA-VRY + XA-VVD + flight ACA91
Initial part of RA message is missing ...
EGLL - MMMX engine parameters ...
BSM = Brake System Monitoring
DFB = Digital Flight Book
DT = Destination, followed by the runway number
FN = Flight Number
TAT = Turn-Around Time
TS = Time Stamp
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
• PRG = Flight Progress Report sent shortly
(i.e. 1 hour - 10 minutes) before arrival,
typically including destination airport followed by
estimated runway for landing, estimated FOB, ETA, and FN
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

6559.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft B-18906 + CC-BBJ + HL7634 + JA13KZ + N580UP + N621UP + flight DAL65
CFD = Centralized Fault Data
CG = Center of Gravity
CI = Consistency Index
ECS = Environmental Control System
FEL = Fuel Estimation Left
FER = Fuel Estimation Right
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response
FCA = Facilities Contact Advisory
FMH = Facilities Message Header = Flight Number
• The TP4 (= Transport Protocol Class 4) message
notifies the pilot of an ATSU identifier
• The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus data for navigational accuracy
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

8416.5 kHz L2C Argentinian Coast Guard Buenos Aires, Argentina

7795.0 kHz JMH2 Tokyo Meteo, Japan

5100.0 kHz VMC Charleville Meteo QLD, Australia

8927.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-58502 + HL7794 + HL8282 + 9V-SHK + flight FDX507 + SIA35
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
EDTO = Extended Diversion Time Operations
OCC = Operations Control Centre
OCCS = Operations Control Centre Singapore
TI2 = Terminal Information Request

10027.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft HL7626 + HL8389 + JA815A + N239NV + N517DZ + N612UP + N783AM + XA-AMX + flight UAL32
NSFA is an ETOPS emergency alternate airport
for trans-Pacific flights with RWY 08/26 = 3000 metres ...
RKSI - MMMX and MMMX - LIRF cruise data ...
The first group is the latitude
The second group is the longitude
and its four last figures is the time in hours and minutes
The third group is the FL
CFB = Centralized Fault Book
DFB = Digital Flight Book
WN = Warning Number, followed by the Date-Time Group
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response
FCA = Facilities Contact Advisory
FMH = Facilities Message Header = Flight Number
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

13324.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft HL7610 + HL8389 + JA890A + N612UP + N886FD + 9V-SCC + flight DAL389
AAWU = Alaska Aviation Weather Unit
AGM = Miscellaneous Air/Ground Message
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
• The TP4 (= Transport Protocol Class 4) message
notifies the pilot of an ATSU identifier
• The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

13324.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft B-2485 + CC-BDC + HL7610 + N382HA + 5Y-KCB + flight SIA218 + UPS109
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
Solar cycle maximum - and the ionosphere going crazy:
METAR uplink for a HKJK - OMSJ Gulf of Aden flight ... via Hawaii!
POSREP = POS, WP, ATO, FL, next+1 WP, ETO, next+2 WP,
ETO, temperature, wind, FOB or SOG, time stamp, date, HEX serial
CFD = Centralized Fault Data
EPCS = Electrical Power Conversion System
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

13988.5 kHz JMH4 Tokyo Meteo, Japan

10100.8 kHz DDK9 Hamburg Meteo, Germany
DWD = Deutscher Wetterdienst

12579.0 kHz UAT Moscow Radio, Russian Federation
Ostrov = Island
Zaliv = Bay

11387.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft CN-ROL + G-VGEM + PS-AJA + XA-ADH + flight AMX007 + UZB101
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
MMMX - EGLL cruise data ...
The first group is the latitude
The second group is the longitude
and its four last figures is the time in hours and minutes
The third group is the FL
AGM = Miscellaneous Air/Ground Message
DFB = Digital Flight Book
• Engine Cruise Report KTPA - EGLL ...
= collection of data over a period of time
in which the aircraft met the appropriate stability criteria
If no stability is detected, then the report
ends with NO STABLE FRAME CONDITION
• Aircraft in-flight performance parameters such as OIT = Oil Temperature are explained e.g. here
• The yellow table below shows a typical parameters list ...

9165.0 kHz HLL Soul Meteo, South Korea
KMA = Korea Meteorological Administration

9165.0 kHz HLL Soul Meteo, South Korea

9165.0 kHz HLL Soul Meteo, South Korea

8942.0 kHz H07 HFDL Shannon Air, Ireland, + aircraft EC-ODQ + ET-AWO + G-NEOU + HZ-NS32 + HZ-NS72 + 7T-VJV + flight AUA60X + QTR9G
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
EC-ODQ is a daily shuttle service LEBL - KJFK - LEBL
by Wamos Air on wet lease for Iberia ...
POSREP = POS, WP, ATO, FL, next+1 WP, ETO, next+2 WP,
ETO, temperature, wind, FOB or SOG, time stamp, date, HEX serial
CFB = Centralized Fault Book
CPRSR = Compressor
ECS = Environmental Control System
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
LGCIU = Landing Gear Control Interface Unit
PACK = Pressurization Air Conditioning Kit
TI2 = Terminal Information Request
WN = Warning Number, followed by the Date-Time Group

490.0 kHz UWT Taganrog Radio, Russian Federation
Warnings still in force - received 021850Z APR 2025

518.0 kHz EAV Valencia Radio, Spain
ODAS = Ocean Data Acquisition System

11306.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-221F + N621UP + RPC8606 + flight CCA966
Riding on the North Pacific Jet Stream east of Hokkaido
at 609 knots = 1127 kilometres per hour ...
AGM = Miscellaneous Air/Ground Message
FOD = Flight Operations Dispatch
P/U = Pick Up
• The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus data for navigational accuracy
• The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

8927.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft B-KQY + B-1566 + B-18905 + N608UP + N24990 + 9V-SMW + flight CAO104
BTMS = Brake Temperature Monitoring System
DT = Displaced Treshold
E/O GRAD = Engine Inoperative Approach Climb Gradient
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response
FCA = Facilities Contact Advisory
FMH = Facilities Message Header = Flight Number
• The TP4 (= Transport Protocol Class 4) message
notifies the pilot of an ATSU identifier
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

8927.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft B-1566 + EI-MYY + HL8701 + N35953 + flight TAI528
DFB = Digital Flight Book
REQPWI = Predicted Wind Request for FL 410 400 380 360
• Engine Cruise Report KLAX - ZSWX ...
= collection of data over a period of time
in which the aircraft met the appropriate stability criteria
If no stability is detected, then the report
ends with NO STABLE FRAME CONDITION
• Aircraft in-flight performance parameters such as OIT = Oil Temperature are explained e.g. here
• The yellow table below shows a typical parameters list ...
• The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus data for navigational accuracy
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

518.0 kHz HZH Jeddah Radio, Saudi Arabia

16806.5 kHz NMF United States Coast Guard Boston MA, United States of America

6559.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft EI-MAA + HL7629 + HL8389 + N782AM + flight NK0624
MMMY - RKSI cruise data ...
The first group is the latitude
The second group is the longitude
and its four last figures is the time in hours and minutes
The third group is the FL
AGM = Miscellaneous Air/Ground Message
DFB = Digital Flight Book
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

8570.0 kHz PWZ Brazilian Navy Rio de Janeiro, Brazil
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

518.0 kHz Kao-Hsiung Radio, Taiwan (Democratic Republic of China)
VTS = Vessel Traffic Service

4209.5 kHz NRV United States Coast Guard Apra Harbour, Guam
BNM = Broadcast Notice to Mariners
COTP = Captain of the Port
GU = Guam
SCC = Sector Command Center
UNDET = Underwater Detonation Exercise

15025.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft B-221F + OH-LWN + OH-LWR + 7T-VJB + flight ETD71M
CCC = Core Compartment Cooling
CFB = Centralized Fault Book
CRS = Cruise Signal
DFB = Digital Flight Book
ECU = Electronic Control Unit
FLR = Failure
FMC = Flight Management Computer
FR = Fault Report, followed by the Date-Time Group
TCAS = Traffic Alert and Collision Avoidance System
WN = Warning Number, followed by the Date-Time Group
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FCA = Facilities Contact Advisory
FCO ADS = Facilities Contact ADS-C
FCO ATC = Facilities Contact CPDLC
FMH = Facilities Message Header = Flight Number
FPO = Facilities Current Position
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

15025.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft A6-EEL + CN-MAY + CS-TSJ + VT-ANX + flight IBE012 + QTR139
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
AGM = Miscellaneous Air/Ground Message
AHRU = Attitude Heading Reference Unit
CCO = Operations Control Centre
CFB = Centralized Fault Book
DB = Dash Board
DT = Destination, followed by the runway number
FDE = Fault Detection and Exclusion
FN = Flight Number
FRC = Fault Reporting Code
IRU = Inertial Reference Unit
SDU = Satellite Data Unit
TI2 = Terminal Information Request
TS = Time Stamp
• PRG = Flight Progress Report sent shortly
(i.e. 1 hour - 10 minutes) before arrival,
typically including destination airport followed by
estimated runway for landing, estimated FOB, ETA, and FN

17615.0 kHz RCV Commonwealth of Independent States Navy Sevastopol', Ukraine

16806.5 kHz NRV United States Coast Guard Apra Harbour, Guam

22448.8 kHz FUV French Navy Jibuti, Djibouti
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

7880.0 kHz DDK3 Hamburg Meteo, Germany
SMHI = Swedish Meteorological and Hydrological Institute

17919.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft B-1428 + flight KAL214
AGM = Miscellaneous Air/Ground Message
MAC = Mean Aerodynamic Chord
M/C = Magnetic Course
M/H = Magnetic Heading
T/C = True Course
T/H = True Heading
ZND = Zone Distance (between checkpoints)
ZNT = Zone Time (between checkpoints)

17919.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft JA15KZ + N292NV + N828CA + PR-TYU + flight IBE030
CFB = Centralized Fault Book
FLR = Failure
FMS = Flight Management System
FR = Fault Report, followed by the Date-Time Group
MDPWI = Meteorological Data - Predicted Wind for FL 380 360 340 320
REQPWI = Predicted Wind Request for FL 380 360 340 320
RESPWI/AC = FMS downlink acceptance and insertion of PWI = Predicted Wind uplink data
RESPWI/AK = FMS downlink acknowledgement of PWI = Predicted Wind uplink data
VSC = Vacuum System Controller

17919.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft B-8657 + JA16KZ + N516DN + N780HA + N851FD + OH-LWS + XA-MFG + flight UPS223
Code figures for EFHK runways braking action - see e.g. here
LEMD - MMMX cruise data ...
The first group is the latitude
The second group is the longitude
and its four last figures is the time in hours and minutes
The third group is the FL
DFB = Digital Flight Book
IC = Icing
P = Primary
S = Secondary
TI2 = Terminal Information Request
• The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

6825.0 kHz French Army Mont-Valerien, France

21934.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft N624UP + OH-LWM + XA-VVD + flight WIN902
AGM = Miscellaneous Air/Ground Message
CFD = Centralized Fault Data
CI = Cost Index
• DELAY is a critical procedure, designed to prevent pilots
from acting on any old CPDLC messages
that might have been delayed in the network
The most serious of such cases would be
the pilot executing a clearance that was no longer valid
• The TP4 (= Transport Protocol Class 4) message
notifies the pilot of an ATSU identifier
• The Waypoint Change Event is triggered by a change
made to the Next, or the Next-plus-one waypoint
This change normally occurs due to normal waypoint sequencing by the FMS
The Next or Next-plus-one waypoint can be either an ATS waypoint or a pilot inserted waypoint
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

518.0 kHz CTV Portuguese Navy Lisbon, Portugal
CENCOMAR = Centro de Comunicacao de Dados e Cifra da Marinha
LL = Light List
ODAS = Ocean Data Acquisition System

518.0 kHz GPK Portpatrick Radio, United Kingdom
FOSNI = Flag Officer Scotland and Northern Ireland
GUNFACTS = Practice firing intentions by military units

21931.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft HL8388 + HP1525 + flight AMX021 + AZU401
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
POSREP = POS, WP, ATO, FL, next+1 WP, ETO, next+2 WP,
ETO, temperature, wind, FOB or SOG, time stamp, date, HEX serial
OC = Operations Control
RNP = Required Navigation Performance
SITA = Societe Internationale de Telecommunication Aeronautique
• RAIM = Receiver Autonomous Integrity Monitoring
A RAIM prediction ensures that available GNSS signals
meet the integrity for a given phase of flight

10084.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft B-LXB + B-6543 + CN-ROL + flight EY02NG
Solar cycle maximum - and the ionosphere going crazy:
POSREP downlink from a HKJK - VABB Arabian Sea flight ... via Auckland!
AA = Arrival Airport
DA = Departure Airport
FPN = Flight Plan Report downlink
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

17967.0 kHz H15 HFDL Muhurroq Air, Bahrain, + aircraft A6-EUX + EI-KDC + HZ-NS76 + flight THY7GT
Airbus' XML failure report system ...
TLSOP = Airbus A380-842 enroute parameters report directly to Toulouse in France
POSREP = POS, WP, ATO, FL, next+1 WP, ETO, next+2 WP,
ETO, temperature, wind, FOB or SOG, time stamp, date, HEX serial
CFB = Centralized Fault Book
CMS = Cabin Management System
DT = Destination, followed by the runway number
FN = Flight Number
SDU = Satellite Data Unit
TI2 = Terminal Information Request
TS = Time Stamp
• The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus data for navigational accuracy
• PRG = Flight Progress Report sent shortly
(i.e. 1 hour - 10 minutes) before arrival,
typically including destination airport followed by
estimated runway for landing, estimated FOB, ETA, and FN
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

518.0 VBE Canadian Coast Guard Pass Lake ONT, Canada
The ice concentration is given in tenths
BW = Bergy Water
CONS = Consolidated
FYI = First-Year Ice
GI = Grey Ice
GWI = Grey-White Ice
IF = Ice Free
MEDI = Medium Lake Ice
MYI = Multi-Year Ice
NI = New Ice
OI = Old Ice
OW = Open Water
THI = Thin Lake Ice
TKI = Thick Lake Ice
TR = Trace Of
SYI = Second-Year Ice
VTKI = Very Thick Lake Ice

16907.5 kHz JFA Funabashi Fisheries Radio, Japan
NOAA satellite settings for JRC / FURUNO fish finder equipment ...
The date reads 7 3 26 = 2025 March 26
since the Japanese calendar year in the Reiwa Era is used here
Formula: Reiwa year + 2018 = Gregorian year

11348.0 kHz H17 HFDL Telde Air, Canary Islands, + aircraft A7-AMG + G-VWAG + HL8388 + N596FE + N618UP + N29978 + XA-AMX + 5A-WLA + flight ACA850
MMMX - LIRF cruise data ...
The first group is the latitude
The second group is the longitude
and its four last figures is the time in hours and minutes
The third group is the FL
BSM = Brake System Monitoring
CFB = Centralized Fault Book
CIDS = Cabin Intercommunication Data System
DFB = Digital Flight Book
DFD = Digital Flight Data
ECS = Environmental Control System
FDU = Fire Detection Unit
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
IFE = In-Flight Entertainment
PES = Passenger Entertainment System
REQPRG = Request Flight Progress Report
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

11348.0 kHz H17 HFDL Telde Air, Canary Islands, + aircraft A7-AMG + HL8388 + N618UP + flight RJA264
CFB = Centralized Fault Book
CFD = Centralized Fault Data
DFB = Digital Flight Book
ECS = Environmental Control System
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response
FCA = Facilities Contact Advisory
FCO ADS = Facilities Contact ADS-C
FCO ATC = Facilities Contact CPDLC
FMH = Facilities Message Header = Flight Number
FPO = Facilities Current Position
• The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus data for navigational accuracy
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

518.0 kHz Balasore Radio, India
IAF = Indian Air Force
IMD = India Meteorological Department
INW = Indian Navigational Warning

518.0 kHz Vakalpudi Radio, India
INW = Indian Navigational Warning

518.0 kHz Veraval Radio, India
IMD = India Meteorological Department
INCOIS = Indian National Centre for Ocean Information Services

21982.0 kHz H15 HFDL Muhurroq Air, Bahrain, + aircraft B-308P + B-1065 + B-2098 + ET-AXT + HZ-NS78 + JY-AYT + VT-IAO + 9V-SHU + 9V-SMR + flight KAL955
CFD = Centralized Fault Data
FSM = Flight System Message
RCD = Request for Departure Clearance
• DELAY is a critical procedure, designed to prevent pilots
from acting on any old CPDLC messages
that might have been delayed in the network
The most serious of such cases would be
the pilot executing a clearance that was no longer valid
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

21982.0 kHz H15 HFDL Muhurroq Air, Bahrain, + aircraft EI-KFD + EI-KGE + ER00007 + 9M-MAH + 9V-SHH + flight KAL955
ADIRU = Air Data Inertial Reference Unit
AI = Arrival Information
CPC = Cabin Pressure Controller
DA = Departure Airport
DI = Departure Information
DM = Time Stamp
DS = Destination Airport
ECAM = Electronic Centralized Aircraft Monitoring
FR = Fault Report, followed by the Date-Time Group
FWC = Flight Warning Computer
GC = Ground Connections
GPSSU = Global Positioning System Sensor Unit
IR = Inertial Reference
MDPWI = Meteorological Data - Predicted Wind for FL 320 330 350
MMR = Multi-Mode Receiver
REQPWI = Predicted Wind Request for FL 360
WN = Warning Number, followed by the Date-Time Group
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

16907.5 kHz JFA Funabashi Fisheries Radio, Japan
Maritime safety information ...
Amphitrite Point is VAE = Canadian Coast Guard Tofino BC ...
The date reads 7 3 24 = 2025 March 24
since the Japanese calendar year in the Reiwa Era is used here
Formula: Reiwa year + 2018 = Gregorian year

13315.0 kHz H13 HFDL Santa Cruz Air, Bolivia, + aircraft PR-YYF + SU-GDA + flight CSC675 + ME0571
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
Solar cycle maximum - and the ionosphere going crazy:
POSREP downlink from a HECA - HLLM cross-border hop ... via Santa Cruz!
POSREP = POS, WP, ATO, FL, next+1 WP, ETO, next+2 WP,
ETO, temperature, wind, FOB or SOG, time stamp, date, HEX serial

17916.0 kHz H13 HFDL Santa Cruz Air, Bolivia, + flight AT0509 + TAM365

518.0 kHz NOJ United States Coast Guard Kodiak, Alaska
BNM = Broadcast Notice to Mariners
LLNR = Light List Number
LT = Light

13988.5 kHz JMH4 Tokyo Meteo, Japan

518.0 kHz CBP Puerto Montt Radio, Chile
R/V = Research Vessel

518.0 kHz SUK Quseir Radio, Egypt
BA = British Admiralty
EGPC = Egyptian General Petroleum Company
GAPCO = Gulf Africa Petroleum Corporation
GUPCO = Gulf of Suez Petroleum Company

518.0 kHz A9M Hamala Radio, Bahrain
BA = British Admiralty
MENAS = Middle East Navigation Aids Service
MEGULITE = Middle East Gulf Lighting Service

518.0 kHz Hamburg Meteo, Germany
NCC = National Co-Ordination Centre
OWP = Offshore Wind Park

17985.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft A7-AMF + A7-AMG + N627UP + N631UP + N898FD + flight CSN698
LLD = Large Lateral Deviation = 10 NM or more without ATC approval
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response
FCA = Facilities Contact Advisory
FMH = Facilities Message Header = Flight Number
• The TP4 (= Transport Protocol Class 4) message
notifies the pilot of an ATSU identifier
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

17985.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft B-1080 enroute LFPG - ZBAA
go2MONITOR's superb Result Viewer allows easy selection of MIAM
out of hundreds of decoded messages by means of advanced filter settings ...
go2MONITOR perfectly re-assembles and decodes MIAM CORE data ...
These are often messages in Airbus' XML format
CMS = Cabin Management System
GNSS = Global Navigation Satellite System
IR = Inertial Reference
ISIS = Integrated Standby Instrument System
MIAM = Media Independent Aircraft Message
MMR = Multi-Mode Receiver
MSN = Manufacturer's Serial Number
PDU = Pilot Display Unit
RTR = Real-Time Report

518.0 kHz XSX Chi-Lung Radio, Taiwan (Democratic Republic of China)

518.0 kHz XSL Fuzhou Radio, China
MSA = Maritime Safety Administration
According to this NAVAREA 11 document, XSL uses indeed
transmitter identification character O on both 518 and 486 kHz

13074.0 kHz JFC Misaki Fisheries Radio, Japan
The date reads 7 3 21 = 2025 March 21
since the Japanese calendar year in the Reiwa Era is used here
Formula: Reiwa year + 2018 = Gregorian year

518.0 kHz V5W Walvis Bay Radio, Namibia
CNW = Coastal Navigational Warning
SAN = South African Navy

518.0 kHz Cape Columbine Radio, South Africa (Republic of)
ZSJ has been ZAN for many years now ...
CNW = Coastal Navigational Warning
SAN = South African Navy

17958.0 kHz H10 HFDL Muan Air, South Korea, + aircraft RA73677 + 9M-XBE + flight CES601
ADIRU = Air Data Inertial Reference Unit
AFS = Auto Flight System
C/B = Circuit Board
CBMU = Circuit Breaker Monitoring Unit
CFB = Centralized Fault Book
DA = Departure Airport
DM = Time Stamp
DMC = Display Management Computer
DS = Destination Airport
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
FWS = Flight Warning System
MMR = Multi-Mode Receiver
VSC = Vacuum System Controller
WN = Warning Number, followed by the Date-Time Group

518.0 kHz ZSD Durban Radio, South Africa (Republic of)
SAWS = South African Weather Service

13342.0 kHz H10 HFDL Muan Air, South Korea, + aircraft B-20CJ + B-32AC + B-326U + OE-LZC + 9V-SGE + 9V-SJC + flight CCS959
AGM = Miscellaneous Air/Ground Message
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
• DELAY is a critical procedure, designed to prevent pilots
from acting on any old CPDLC messages
that might have been delayed in the network
The most serious of such cases would be
the pilot executing a clearance that was no longer valid
• The TP4 (= Transport Protocol Class 4) message
notifies the pilot of an ATSU identifier
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

518.0 kHz 3BM Port Louis Radio, Mauritius
ITCZ = Inter-Tropical Convergence Zone
TOO = Time of Observation

11354.0 kHz H09 HFDL Barrow Air, Alaska, + flight AC0042 + FDX603

11354.0 kHz H09 HFDL Barrow Air, Alaska, + aircraft HL8389 + HS-VKE + N782AM + N965AM + N891FD + 9V-SMN + flight ACA79 + AC0072
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
RJAA - MMMX cruise data ...
The first group is the latitude
The second group is the longitude
and its four last figures is the time in hours and minutes
The third group is the FL
CFB = Centralized Fault Book
DB = Dash Board
DFB = Digital Flight Book
FDE = Fault Detection and Exclusion
FRC = Fault Reporting Code
GPM = General Processing Module
PDHM = Prognostic and Diagnostic Health Monitor
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response
FMH = Facilities Message Header = Flight Number
• The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

518.0 kHz SVK Kerkyra Radio, Greece

11387.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft G-VLUX + XA-AMR + 9V-SMH + flight VIR103
FMR should read FRM ...
LIRF - MMMX and MMMX - SAEZ cruise data ...
The first group is the latitude
The second group is the longitude
and its four last figures is the time in hours and minutes
The third group is the FL
L/R engine data ...
BSM = Brake System Monitoring
DFB = Digital Flight Book
FSS = Flight Service Station
TI2 = Terminal Information Request
• DELAY is a critical procedure, designed to prevent pilots
from acting on any old CPDLC messages
that might have been delayed in the network
The most serious of such cases would be
the pilot executing a clearance that was no longer valid
• The TP4 (= Transport Protocol Class 4) message
notifies the pilot of an ATSU identifier
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

16806.5 kHz NMC United States Coast Guard San Francisco CA, United States of America

13270.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft A6-EJB + B-MBP + B-32C7 + B-32FE + B-5922 + B-8890 + HL8081 + PK-BGZ + flight THY165
Code figures for WSSS runways braking action - see e.g. here
AGM = Miscellaneous Air/Ground Message
CFB = Centralized Fault Book
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
MMR = Multi-Mode Receiver
RSCD = Runway Surface Condition
RWYCC = Runway Condition Code
TI2 = Terminal Information Request
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response
FMH = Facilities Message Header = Flight Number
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

518.0 kHz Chukpy Radio, South Korea
Warnings still in force - received 191530Z MAR 2025
JCS = Joint Chiefs of Staff

4209.5 kHz XVG Hai Phong Radio, Viet Nam

4209.5 kHz XVG Hai Phong Radio, Viet Nam
If diacritics are not attributed correctly, the AI translation is somewhat "bombed" ...

6450.0 kHz PWZ Brazilian Navy Rio de Janeiro, Brazil

13351.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft N23983 + 9V-SKY + flight LAN621 + SIA297
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
OC = Operations Control

518.0 kHz LGQ Rogaland Radio, Norway

13351.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft B-321J + B-1356 + B-18901 + HL7629 + N23983 + flight UAE1CR
AGM = Miscellaneous Air/Ground Message
AOC = Airline Operations Control
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FCO ADS = Facilities Contact ADS-C
FCO ATC = Facilities Contact CPDLC
FCP = Facilities Contact Response
FMH = Facilities Message Header = Flight Number
FPO = Facilities Current Position
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
• The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

15025.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft B-LRM + CN-RGN + D-AIAA + HL8517 + N438AM + OE-LZD + PR-YYL + SU-GDC + flight UAE73J
MMMX - LEMD cruise data ...
The first group is the latitude
The second group is the longitude
and its four last figures is the time in hours and minutes
The third group is the FL
POSREP = POS, WP, ATO, FL, next+1 WP, ETO, next+2 WP,
ETO, temperature, wind, FOB or SOG, time stamp, date, HEX serial
AGM = Miscellaneous Air/Ground Message
CTOT = Calculated Take-Off Time (used for slot allocation)
DFB = Digital Flight Book
DT = Destination, followed by the runway number
FN = Flight Number
TI2 = Terminal Information Request
• DELAY is a critical procedure, designed to prevent pilots
from acting on any old CPDLC messages
that might have been delayed in the network
The most serious of such cases would be
the pilot executing a clearance that was no longer valid
• PRG = Flight Progress Report sent shortly
(i.e. 1 hour - 10 minutes) before arrival,
typically including destination airport followed by
estimated runway for landing, estimated FOB, ETA, and FN
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

9165.0 kHz HLL Soul Meteo, South Korea
GK2A = GEO KOMP 2A = Geostationary Korea Multi Purpose Satellite
KMA = Korea Meteorological Administration

6652.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft 9V-SGG + flight ACA35 + CCA406
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
TTO = Target Time Over

11030.0 kHz VMC Charleville Meteo QLD, Australia

11030.0 kHz VMC Charleville Meteo QLD, Australia

518.0 kHz NMG United States Coast Guard New Orleans LA, United States of America

518.0 kHz L3B Argentinian Coast Guard Comodoro Rivadavia, Argentina

518.0 kHz L2N Argentinian Coast Guard Bahia Blanca, Argentina

518.0 kHz HSA Bangkok Radio, Thailand
005671000 is the station's MMSI (Maritime Mobile Service Identity) code

486.0 kHz XSV Tianjin Radio, China
Chinese teleprinter code after Latin alphabet header
AIZAIZAIZAIZ corresponds to NNNN
According to this NAVAREA 11 document, XSV uses indeed
transmitter identification character S on both 518 and 486 kHz

11306.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-6771 + HL8293 + N629UP + N632UP + N635UP + XA-VAM + XA-VSF + flight CSC675
Code figures for KONT runways braking action - see e.g. here
EDR = Eddy Dissipation Rate
FICON = Field Conditions
ITA = IATA Turbulence Aware Platform

518.0 kHz JNB Naha Radio, Okinawa Island, Japan

518.0 kHz LGP Bodoe Radio, Norway

518.0 kHz JNR Moji Radio, Japan

11387.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft EI-MAA + LV-KHT + N591FE + N948AV + flight FIN19 + SIA21
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
DT = Destination, followed by the runway number
FN = Flight Number
REQPWI = Predicted Wind Request for FL 410 390 370 350
TI2 = Terminal Information Request
TODA = Take Off Distance Available
TS = Time Stamp
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FCO ADS = Facilities Contact ADS-C
FCO ATC = Facilities Contact CPDLC
FMH = Facilities Message Header = Flight Number
FPO = Facilities Current Position

10063.0 kHz H11 HFDL Panama City Air, Panama, + flight KAL081 + UAL844

8936.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft B-20A2 + B-30CX + B-8398 + B-8583 + JA804A + JA212A + flight DAL8
AGM = Miscellaneous Air/Ground Message
DFB = Digital Flight Book
EGT = Exhaust Gas Temperature
EPR = Engine Pressure Ratio
FF = Fuel Flow (for engines 1 + 2)
OIP = Oil Pressure
OIQ = Oil Quantity
OIT = Oil Temperature
TLA = Thrust Lever Angle
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

518.0 kHz SVH Iraklion Radio, Greece
Warnings still in force - received 100110Z MAR 2025

518.0 kHz IQM Mondolfo Radio, Italy

518.0 kHz 3VL Kelibia Radio, Tunisia
MPSV = Multi-Purpose Supply Vessel

10060.0 kHz H10 HFDL Muan Air, South Korea, + aircraft B-32AL enroute ZBAA - YMML
go2MONITOR's superb Result Viewer allows easy selection of MIAM
out of hundreds of decoded messages by means of advanced filter settings ...
go2MONITOR perfectly re-assembles and decodes MIAM CORE data ...
These are often messages in Airbus' XML format
CMS = Cabin Management System
MIAM = Media Independent Aircraft Message
MSN = Manufacturer's Serial Number
PDU = Pilot Display Unit
RTR = Real-Time Report
VTS = Vacuum Toilet Service

4209.5 kHz TAH Istanbul Radio, Turkey

10060.0 kHz H10 HFDL Muan Air, South Korea, + flight CES780 + CES895

5100.0 kHz VMC Charleville Meteo QLD, Australia

5100.0 kHz VMC Charleville Meteo QLD, Australia

486.0 kHz XSG Shanghai Radio, China
Chinese teleprinter code after Latin alphabet header
AIZAIZAIZAIZ corresponds to NNNN
Presumably local time used here since received at 1440 UTC ...
According to this NAVAREA 11 document, XSG uses indeed
transmitter identification character Q on both 518 and 486 kHz

4209.5 kHz XVN Nha Trang Radio, Viet Nam
Warnings still in force - received 081620Z MAR 2025

518.0 kHz Sandakan Radio, Sabah, Malaysia
NTM = Notice to Mariners
Warnings still in force - received 081500Z MAR 2025

17967.0 kHz H15 HFDL Muhurroq Air, Bahrain, + aircraft OH-LWI enroute VTBS - EFHK
go2MONITOR's superb Result Viewer allows easy selection of MIAM
out of hundreds of decoded messages by means of advanced filter settings ...
go2MONITOR perfectly re-assembles and decodes MIAM CORE data ...
These are often messages in Airbus' XML format
ADIRU = Air Data Inertial Reference Unit
AESS = Aircraft Environment Surveillance System
CMS = Cabin Management System
MIAM = Media Independent Aircraft Message
MSN = Manufacturer's Serial Number
PDU = Pilot Display Unit
RTR = Real-Time Report

17967.0 kHz H15 HFDL Muhurroq Air, Bahrain, + aircraft B-308P + B-2097 + HZ-NS74 + JY-AYV + SU-GEI + UK33021 + 9M-MAH + flight FDX512 + QTR62P
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
CFB = Centralized Fault Book
CFD = Centralized Fault Data
DFB = Digital Flight Book
DSPTCH = WP/ETO/FOB/FL
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
MMR = Multi-Mode Receiver
REQPWI = Predicted Wind Request for FL 300
• Engine Cruise Report LTFM - UTTT ...
= collection of data over a period of time
in which the aircraft met the appropriate stability criteria
If no stability is detected, then the report
ends with NO STABLE FRAME CONDITION
• Aircraft in-flight performance parameters such as OIT = Oil Temperature are explained e.g. here
• The yellow table below shows a typical parameters list ...

13988.5 kHz JMH4 Tokyo Meteo, Japan

13988.5 kHz JMH4 Tokyo Meteo, Japan

6661.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft N613UP + N723NK + N965AM + flight FDX457
RKSI - MMMX cruise data ...
The first group is the latitude
The second group is the longitude
and its four last figures is the time in hours and minutes
The third group is the FL
DFB = Digital Flight Book
LAHSO = Land And Hold Short Operations
TI2 = Terminal Information Request
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

9165.0 kHz HLL Soul Meteo, South Korea

13074.0 kHz JFC Misaki Fisheries Radio, Japan
Japanese Coast Guard navigational warnings for NAVAREAs 10 / 11 ...
MICS = Maritime Information and Communication System
The date reads 7 3 7 = 2025 March 7
since the Japanese calendar year in the Reiwa Era is used here
Formula: Reiwa year + 2018 = Gregorian year

13074.0 kHz JFC Misaki Fisheries Radio, Japan
JAFIC = Japan Fisheries Information Service Center
The date reads 7 3 7 = 2025 March 7
since the Japanese calendar year in the Reiwa Era is used here
Formula: Reiwa year + 2018 = Gregorian year

13270.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft A6-ATB + 4R-ABT + 9N-ALM + 9V-SHL + 9V-SHS + 9V-SHY + flight GFA123
ACT = Additional Center Tank
ADIRU = Air Data Inertial Reference Unit
AFMS = Aircraft Fuel Management System
AFS = Auto Flight System
ALSCU = Auxiliary Level Sensoring Control Unit
CFB = Centralized Fault Book
DA = Departure Airport
DM = Time Stamp
DMC = Display Management Computer
DS = Destination Airport
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
IR = Inertial Reference
RA = Radio Altimeter
ROP = Runway Overrun Protection
ROW = Runway Overrun Warning
TI2 = Terminal Information Request
WN = Warning Number, followed by the Date-Time Group
WXR = Weather Radar
• The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

490.0 kHz IGS Piombino Radio, Italy
VTS = Vessel Traffic Service

490.0 kHz Centre Regional Operationnel de Surveillance et de Sauvetage Toulon, France

490.0 kHz OST Oostende Radio, Belgium

8658.0 kHz JFC Misaki Fisheries Radio, Japan
Latest tuna market prices ...
The date reads 7 3 5 = 2025 March 5
since the Japanese calendar year in the Reiwa Era is used here
Formula: Reiwa year + 2018 = Gregorian year

12860.3 kHz NYBM Digital data station

21955.0 kHz H17 HFDL Telde Air, Canary Islands, + aircraft ET-AUB + F-HRBJ + G-VLDY + flight DAL200
Airbus' XML failure report system ...
AA = Arrival Airport
AP = Approach type and runway number
CFB = Centralized Fault Book
CMS = Cabin Management System
CPCS = Cabin Pressure Control System
DA = Departure Airport
FPN = Flight Plan Report downlink
MSN = Manufacturer's Serial Number
OFV = Outflow Valve
RTR = Real-Time Report
AFN = ATS Facilities Notification (ATS = Air Traffic Service)y
FCO ADS = Facilities Contact ADS-C
FCO ATC = Facilities Contact CPDLC
FMH = Facilities Message Header = Flight Number
FPO = Facilities Current Position
• The TP4 (= Transport Protocol Class 4) message
notifies the pilot of an ATSU identifier
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

518.0 kHz NMF United States Coast Guard Boston MA, United States of America
BNM = Broadcast Notice to Mariners
LA = Los Angeles
LB = Lighted Buoy
LB = Long Beach
LLNR = Light List Number
LT = Light
POC = Point of Contact

17928.0 kHz H17 HFDL Telde Air, Canary Islands, + aircraft CN-RGI + CN-ROJ + CN-ROL + N742AM + N966AM + flight AFR756 + CHH730
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
MMMX - LIRF + MMMX - LEMD cruise data ...
The first group is the latitude
The second group is the longitude
and its four last figures is the time in hours and minutes
The third group is the FL
DFB = Digital Flight Book
TI2 = Terminal Information Request

21955.0 kHz H17 HFDL Telde Air, Canary Islands, + aircraft A7-ANM + PR-TYI + PR-TYQ + 9V-SMV + flight AFR264
CFB = Centralized Fault Book
DA = Departure Airport
DFB = Digital Flight Book
DM = Time Stamp
DS = Destination Airport
FMS = Flight Management System
MDPWI = Meteorological Data - Predicted Wind for FL 360 340 320 300
REQPER = Request Performance Report
RESPWI/AK = FMS downlink acknowledgement of PWI = Predicted Wind uplink data
RSCD = Runway Surface Condition
TI2 = Terminal Information Request
WN = Warning Number, followed by the Date-Time Group
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAK = Facilities Acknowledgement Message
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response
FCA = Facilities Contact Advisory
FMH = Facilities Message Header = Flight Number
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

13988.5 kHz JMH4 Tokyo Meteo, Japan

13303.0 kHz H17 HFDL Telde Air, Canary Islands, + flight AC0833 + ASL70Z

13270.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft B-303A + ES-SAZ + EZ-F430 + VN-A515 + VT-IAO + 9M-XBW + 9V-SHG + 9V-SMG + flight BTK615
ETO = Estimated Time of Overfly
TI2 = Terminal Information Request
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

518.0 kHz NMN United States Coast Guard Norfolk VA, United States of America
BNM = Broadcast Notice to Mariners
HAZOPS = Hazardous Operations
MCM = Mine Countermeasures Ships

13270.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft B-MBO + HS-XTG + HS-XTH + JA804A + VT-IAO + 9V-SMK + flight ETH685
ACMF = Aircraft Condition Monitoring Function
ADF = Automatic Direction Finder
AGM = Miscellaneous Air/Ground Message
CFB = Centralized Fault Book
DFB = Digital Flight Book
DMC = Display Management Computer
ECB = Environmental Control Board
FCMC = Fuel Control and Monitoring Computer
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
PSCU = Proximity Switch Control Unit
WN = Warning Number, followed by the Date-Time Group
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

8459.0 kHz NOJ United States Coast Guard Kodiak, Alaska
Strange horizontal distortion despite fair signal quality ...

8459.0 kHz NOJ United States Coast Guard Kodiak, Alaska
Strange horizontal distortion despite fair signal quality ...
NCEP = National Centers for Environmental Prediction

8647.8 kHz FUJ French Navy Noumea, New Caledonia

21931.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft G-VLUX + N284AV + N612UP + XA-MFG + flight BOE173 = aircraft HL8538 test flight
MMMX - SAEZ cruise data ...
The first group is the latitude
The second group is the longitude
and its four last figures is the time in hours and minutes
The third group is the FL
DFB = Digital Flight Book
DT = Destination, followed by the runway number
FN = Flight Number
REQPWI = Predicted Wind Request for FL 360 320 300 270
VA = Volcanic Ash
• The TP4 (= Transport Protocol Class 4) message
notifies the pilot of an ATSU identifier
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
• The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles
• The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus data for navigational accuracy
• PRG = Flight Progress Report sent shortly
(i.e. 1 hour - 10 minutes) before arrival,
typically including destination airport followed by
estimated runway for landing, estimated FOB, ETA, and FN
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

4346.0 kHz NMC United States Coast Guard San Francisco CA, United States of America
NCEP = National Centers for Environmental Prediction

4346.0 kHz NMC United States Coast Guard San Francisco CA, United States of America
NCEP = National Centers for Environmental Prediction
NHC = National Hurricane Center

518.0 kHz NMW United States Coast Guard Astoria OR, United States of America
BNM = Broadcast Notice to Mariners
LA = Los Angeles
LB = Long Beach
LLNR = Light List Number
LT = Light
MRASS = Mariner Radio Activated Sound Signal

518.0 kHz VAU Canadian Coast Guard Chebogue NS, Canada

13270.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft B-300A + B-324H + B-6325 + HS-XTG + N134FE + N629UP + 9V-SJG + flight CES637
Pretty complex FPL for a simple VCBI - ZUTF flight ...
AA = Arrival Airport
AGM = Miscellaneous Air/Ground Message
CFB = Centralized Fault Book
DA = Departure Airport
FCMC = Fuel Control and Monitoring Computer
FLR = Failure
FPN = Flight Plan Report downlink
FR = Fault Report, followed by the Date-Time Group
REQFPN = FPL report request uplink
TS = Time Stamp
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response
FCA = Facilities Contact Advisory
FMH = Facilities Message Header = Flight Number
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

518.0 kHz UFL Vladivostok Radio SE, Russian Federation

21931.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft F-HUVN + G-VLUX + VT-JRF + flight UAL961
DT = Destination, followed by the runway number
FN = Flight Number
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response
FCA = Facilities Contact Advisory
FCO ADS = Facilities Contact ADS-C
FCO ATC = Facilities Contact CPDLC
FMH = Facilities Message Header = Flight Number
FPO = Facilities Current Position
• PRG = Flight Progress Report sent shortly
(i.e. 1 hour - 10 minutes) before arrival,
typically including destination airport followed by
estimated runway for landing, estimated FOB, ETA, and FN
• The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus data for navigational accuracy
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

21931.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft G-VLUX enroute EGLL - KLAX
go2MONITOR's superb Result Viewer allows easy selection of MIAM
out of hundreds of decoded messages by means of advanced filter settings ...
go2MONITOR perfectly re-assembles and decodes MIAM CORE data ...
These are often messages in Airbus' XML format
CMS = Cabin Management System
MIAM = Media Independent Aircraft Message
MSN = Manufacturer's Serial Number
PDU = Pilot Display Unit
RTR = Real-Time Report

9165.0 kHz HLL Soul Meteo, South Korea

8416.5 kHz NMO United States Coast Guard Honolulu, Hawaii
BNM = Broadcast Notice to Mariners
IAW = In Accordance With
LA = Los Angeles
LB = Long Beach
PMSR = Point Mugu Sea Range

8977.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft A6-EVN + UK32012 + flight QTR43C
ZFW + TOF = TOW - TIF = LAW + UNDLD = MAX
AGM = Miscellaneous Air/Ground Message
DOI = Dry Operating Index
DOW = Dry Operating Weight
LWMAC = Landing Weight Mean Aerodynamic Chord
REQPWI = Predicted Wind Request for FL 370 350 330 310
TOMAC = Take-Off Mean Aerodynamic Chord
TS = Time Stamp
ZFMAC = Zero Fuel Mean Aerodynamic Chord
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FCA = Facilities Contact Advisory
FMH = Facilities Message Header = Flight Number
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

518.0 kHz JNX Kushiro Radio, Japan
LL = Light List

21982.0 kHz H15 HFDL Muhurroq Air, Bahrain, + aircraft B-32GX + B-6967 + ES-SAG + HZ-NS36 + OE-LZC + VT-IFV + 7O-AFA + flight CES787
AGM = Miscellaneous Air/Ground Message
CFB = Centralized Fault Book
DA = Departure Airport
DM = Time Stamp
DS = Destination Airport
FADEC = Full Authority Digital Engine Control
FR = Fault Report, followed by the Date-Time Group
WN = Warning Number, followed by the Date-Time Group
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAK = Facilities Acknowledgement Message
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response
FMH = Facilities Message Header = Flight Number
• The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

21982.0 kHz H15 HFDL Muhurroq Air, Bahrain, + aircraft HZ-NS68 + SU-GEJ + VT-IFN + flight FIE316 + SAA074
TI2 = Terminal Information Request

4199.8 kHz XSQ Guangzhou Radio, China
CMA = China Meteorological Administration
MSA = Maritime Safety Administration

5195.0 kHz DRA5 Kiel, Germany

4210.0 (not 4209.5!) kHz L2C Argentinian Coast Guard Buenos Aires, Argentina

4210.0 (not 4209.5!) kHz L2C Argentinian Coast Guard Buenos Aires, Argentina

518.0 kHz Bjuroklubb Radio, Sweden
TSS = Traffic Separation Scheme

518.0 kHz ESA Tallinn Radio, Estonia
PET = Saint Petersburg

11306.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft C-FRSA + CN-RGG + JA205P + JA825P + T7-BOSS + flight CSC323
Solar cycle maximum - and the ionosphere going crazy:
WXRQ downlink from and METAR uplink to a DNAA - GMMN regional West African hop ... via Guam!
AGM = Miscellaneous Air/Ground Message
DT = Destination, followed by the runway number
FN = Flight Number
LGTM = Light Minus Turbulence = relatively weaker intensity
OCC = Operations Control Centre
TS = Time Stamp
• PRG = Flight Progress Report sent shortly
(i.e. 1 hour - 10 minutes) before arrival,
typically including destination airport followed by
estimated runway for landing, estimated FOB, ETA, and FN

11306.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-5918 + flight C PA828
AGM = Miscellaneous Air/Ground Message
BT = Brake Temperature
DFB = Digital Flight Book
FQLI = Fuel Quantity Inner Left Tank
FQLO = Fuel Quantity Outer Left Tank
FQRI = Fuel Quantity Inner Right Tank
FQRO = Fuel Quantity Outer Right Tank
FQTT = Fuel Quantity Total
HPP = High Pressure Pump
LPP = Low Pressure Pump
MDPWI = Meteorological Data - Predicted Wind for FL 380
REQPWI = Predicted Wind Request for FL 380
OIP = Oil Pressure
OIQ = Oil Quantity
OIT = Oil Temperature
TIP = Tire Pressure

4500.0 kHz Digital data station

4209.5 kHz XSV Tianjin Radio, China
MSA = Maritime Safety Administration

15626.0 kHz Digital data station

518.0 kHz VAJ Canadian Coast Guard Prince Rupert BC, Canada
Digby is a small island off Prince Rupert
Haida Gwaii = ex Queen Charlotte Islands

13264.0 kHz Shannon Air / Volmet, Ireland
go2MONITOR has the ability to transcribe audio files into text automatically ...
This function is implemented by using an external open-source tool called 'Whisper'
The Speech-to-Text function is integrated in the superb Result Viewer for results containing audio files
The new function opens up completely new possibilities, e.g.
• Searching for spoken content and generating content-based alerts and warnings
• Simply forwarding the spoken content in text form to other systems or software
• Using of translation to easily understand other spoken languages

518.0 kHz ZBM Hamilton Harbour Radio, Bermuda

518.0 kHz NMA United States Coast Guard Miami FL, United States of America
BNM = Broadcast Notice to Mariners

8677.0 kHz CBV Valparaiso Radio, Chile
GFS = Global Forecast System

10451.8 kHz Digital data station

21982.0 kHz H15 HFDL Muhurroq Air, Bahrain, + aircraft EI-KGF + ES-SAZ + SU-GDX + SU-GEI + 5Y-KCB + 7O-AFE + flight IYE642
go2MONITOR's superb SQL (Structured Query Language) filter allows
precise selection of required results out of thousands of decoded messages
CIDS = Cabin Intercommunication Data System
DT = Destination, followed by the runway number
ECU = Electronic Control Unit
FLR = Failure
FN = Flight Number
FR = Fault Report, followed by the Date-Time Group
FSM = Flight System Message
REQPWI = Predicted Wind Request for FL 360 340 320 300
WN = Warning Number, followed by the Date-Time Group
• PRG = Flight Progress Report sent shortly
(i.e. 1 hour - 10 minutes) before arrival,
typically including destination airport followed by
estimated runway for landing, estimated FOB, ETA, and FN

518.0 kHz XVS Ho Chi Minh City Radio, Viet Nam

518.0 kHz JGC Yokohama Radio, Japan

11030.0 kHz VMC Charleville Meteo QLD, Australia

8677.0 kHz CBV Valparaiso Radio, Chile

518.0 kHz EJM Irish Coast Guard Malin Head, Ireland

8927.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-32LG + B-303A + B-5961 + B-6097 + B-7836 + JA884A + JA899A + N28987 + flight APZ131
A NOTAM decoder can be found e.g. here
LID = Landing Information Delivery
PDC = Pre-Departure Clearance
• Engine Cruise Report ZSHC - NZAA ...
= collection of data over a period of time
in which the aircraft met the appropriate stability criteria
If no stability is detected, then the report
ends with NO STABLE FRAME CONDITION
• Aircraft in-flight performance parameters such as OIT = Oil Temperature are explained e.g. here
• The yellow table below shows a typical parameters list ...
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

9982.5 kHz KVM70 Honolulu Meteo, Hawaii

9982.5 kHz KVM70 Honolulu Meteo, Hawaii

518.0 kHz XSZ Dalian Radio, China
MSA = Maritime Safety Administration

518.0 kHz EQI Abbas Radio, Iran
PMO = Port and Maritime Organization

518.0 kHz Keating Point Radio, Andaman Islands, India
IMD = India Meteorological Department
INW = Indian Navigational Warning

518.0 kHz 9MG Georgetown Radio, Pinang Island, Malaysia
Warnings still in force - received 041520Z FEB 2025
PSA = Port of Singapore Authority
TSS = Traffic Separation Scheme
VTS = Vessel Traffic Service

4209.5 kHz XVN Nha Trang Radio, Viet Nam
Warnings still in force - received 030420Z FEB 2025

17151.2 kHz NMC United States Coast Guard San Francisco CA, United States of America
NCEP = National Centers for Environmental Prediction

17151.2.0 kHz NMC United States Coast Guard San Francisco CA, United States of America
NCEP = National Centers for Environmental Prediction

17151.2 kHz NMC United States Coast Guard San Francisco CA, United States of America
GFS = Global Forecast System
NCEP = National Centers for Environmental Prediction

17151.2 kHz NMC United States Coast Guard San Francisco CA, United States of America
GFS = Global Forecast System
NCEP = National Centers for Environmental Prediction

8948.0 kHz H17 HFDL Telde Air, Canary Islands, + aircraft CC-BGF + CN-ROH + ET-BAW + F-HLUX + SU-GEG + 5A-WLA + flight ABY322
Perfect OOOI ...
POSREP = POS, WP, ATO, FL, next+1 WP, ETO, next+2 WP,
ETO, temperature, wind, FOB or SOG, time stamp, date, HEX serial
CDP = Computer Diagnostics Program
CFB = Centralized Fault Book
CIDS = Cabin Intercommunication Data System
DFD = Digital Flight Data
EDP = Engine Display Panel
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
FWS = Flight Warning System
HPP = High Pressure Pump
PISA = Passenger Interface and Supply Adapter
PSH = Pushback Time
RESREQ/AK = FMS downlink acknowledgement of a REQFPN uplink
SR = Seat Row
TS = Time Stamp
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

8948.0 kHz H17 HFDL Telde Air, Canary Islands, + aircraft CC-BGF + CN-RHB + F-HTYH + 5Y-KYE + flight QTR48F
CG = Center of Gravity
CI = Consistency Index
FEL = Fuel Estimation Left
FER = Fuel Estimation Right
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response
FCA = Facilities Contact Advisory
FCO ADS = Facilities Contact ADS-C
FCO ATC = Facilities Contact CPDLC
FMH = Facilities Message Header = Flight Number
FPO = Facilities Current Position
• DELAY is a critical procedure, designed to prevent pilots
from acting on any old CPDLC messages
that might have been delayed in the network
The most serious of such cases would be
the pilot executing a clearance that was no longer valid
• The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

518.0 kHz VCP Canadian Coast Guard Robin Hood Bay NFLD, Canada

518.0 kHz OXF Simiutaq Radio, Greenland

518.0 kHz VCF Canadian Coast Guard Moisie QUE, Canada

17421.8 kHz PWR • PWS Brazilian Navy Rio Recife • Salvador, Brazil

11030.0 kHz VMC Charleville Meteo QLD, Australia
MSLP = Mean Sea Level Pressure

518.0 VCO Canadian Coast Guard Port Caledonia NS, Canada

518.0 kHz NMR United States Coast Guard San Juan, Puerto Rico
BNM = Broadcast Notice to Mariners
LA = Los Angeles
LB = Long Beach

518.0 kHz Parangipettai Radio, India
IMD = India Meteorological Department
INW = Indian Navigational Warning

12579.0 kHz L2C Argentinian Coast Guard Buenos Aires, Argentina

8439.0 kHz PBB Dutch Navy Den Helder, Netherlands

518.0 kHz VOK Canadian Coast Guard Cartwright NFLD, Canada

518.0 kHz Don Sak Radio, Thailand
005671000 is the station's MMSI (Maritime Mobile Service Identity) code
See 5 AUG 2021 NAVTEX Panel Report

10030.0 kHz H15 HFDL Muhurroq Air, Bahrain, + flight MAU53 + UAE51P

8927.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-32KM + B-209E + B-308E + JA885A + RA73673 + RPC8609 + VN-A690 + flight CCA115
RA73673 is the "re-registered" (read: seized) Aurora Airbus A319-111
leased from AMCK (Aviation Maverick Cheung Kong) Holdings Ireland Limited
and originally registered as VQ-BBD in Bermuda ...
Initial part of the weight/balance sheet is missing ...
AVI = Live Animals
CFB = Centralized Fault Book
DA = Departure Airport
DFD = Digital Flight Data
DM = Time Stamp
DOI = Dry Operating Index
DS = Destination Airport
FWS = Flight Warning System
LITOW = Loaded Index at TOW
LIZFW = Loaded Index at ZFW
MAC... = Mean Aerodynamic Chord ...
SI = Supplementary Information
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

490.0 kHz TFX Siglufjördur Radio, Iceland
Saudanes is a lighthouse near Siglufjördur

518.0 kHz GNI Niton Radio, United Kingdom

8424.0 kHz SVO Olympia Radio, Athens, Greece

21937.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + flight SJX840 + UAE368

490.0 kHz TAN Izmir Radio, Turkey

518.0 kHz 4XO Haifa Radio, Israel
IMOT = Israel Ministry of Transport and Road Safety
NTM = Notice to Mariners
Warnings still in force - received 230230Z JAN 2025

13270.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft B-LRF enroute VHHH - VIDP
go2MONITOR's superb Result Viewer allows easy selection of MIAM
out of hundreds of decoded messages by means of advanced filter settings ...
go2MONITOR perfectly re-assembles and decodes MIAM CORE data ...
These are often messages in Airbus' XML format
CMS = Cabin Management System
FDE = Fault Detection and Exclusion
GLS = GBAS (Ground-Based Augmentation System) Landing System
MIAM = Media Independent Aircraft Message
MSN = Manufacturer's Serial Number
PDU = Pilot Display Unit
RTR = Real-Time Report

12579.0 kHz UAT Moscow Radio, Russian Federation

518.0 kHz Muttam Point Radio, India
IFB = Indian Fishing Boat
IMD = India Meteorological Department
INW = Indian Navigational Warning

5720.0 kHz H03 HFDL Reykjavik Air, Iceland, + flight FX5201 + MS0080

4209.5 kHz SVH Iraklion Radio, Greece

490.0 kHz TAL Antalya Radio, Turkey

7396.9 kHz HSW64 Bangkok Meteo, Thailand

7396.9 kHz HSW64 Bangkok Meteo, Thailand

8416.5 kHz NMC United States Coast Guard San Francisco CA, United States of America
APT = Automatic Picture Transmission

518.0 kHz VAE Canadian Coast Guard Tofino BC, Canada

7795.0 kHz JMH2 Tokyo Meteo, Japan

4209.5 kHz XSG Shanghai Radio, China
MSA = Maritime Safety Administration

518.0 kHz XVT Da Nang Radio, Viet Nam
AIS = Automatic Identification System

518.0 kHz EQM Bushire Radio, Iran

518.0 kHz EAR La Coruna Radio, Spain

518.0 kHz Centre Regional Operationnel de Surveillance et de Sauvetage Corsen, France

4298.0 kHz NOJ United States Coast Guard Kodiak, Alaska
Strange horizontal distortion despite fair signal quality ...

4298.0 kHz NOJ United States Coast Guard Kodiak, Alaska
Strange horizontal distortion despite fair signal quality ...

518.0 kHz Vengurla Point Radio, India
IMD = India Meteorological Department

13351.0 kHz H05 HFDL Auckland Air, New Zealand, + flight AIC220

518.0 kHz UFO Kholmsk Radio FE, Russian Federation
Proliv = Strait
Zaliv = Bay

2610.2 kHz FUO French Navy Toulon, France
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

4209.5 kHz XSQ Guangzhou Radio, China
MSA = Maritime Safety Administration

16953.3 kHz 6WW French Navy Dakar, Senegal

10093.0 kHz H09 HFDL Barrow Air, Alaska, + aircraft HL8387 + HL8701 + N846FD + PS-LAA
PACD is an ETOPS emergency alternate airport
for trans-Pacific flights with RWY 15/33 = 3103 metres ...
AGM = Miscellaneous Air/Ground Message
CFD = Centralized Fault Data
OCC = Operations Control Centre
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
• DELAY is a critical procedure, designed to prevent pilots
from acting on any old CPDLC messages
that might have been delayed in the network
The most serious of such cases would be
the pilot executing a clearance that was no longer valid
• The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

21997.0 kHz H13 HFDL Santa Cruz Air, Bolivia, + aircraft HC-CRU + HP1714 + N963AV + N967AM + PR-TYI + XA-ADG + flight AVA229 + AVR481
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
MMMX - SCEL and MMMX - SAEZ cruise data ...
The first group is the latitude
The second group is the longitude
and its four last figures is the time in hours and minutes
The third group is the FL
DFB = Digital Flight Book
DT = Destination, followed by the runway number
FN = Flight Number
SITA = Societe Internationale de Telecommunication Aeronautique
TI2 = Terminal Information Request
• PRG = Flight Progress Report sent shortly
(i.e. 1 hour - 10 minutes) before arrival,
typically including destination airport followed by
estimated runway for landing, estimated FOB, ETA, and FN

518.0 kHz OXJ Torshavn Radio, Faroe Islands, Denmark
DMI = Danish Meteorological Institute

518.0 kHz Santa Marta Radio, Colombia

9110.0 kHz NMF United States Coast Guard Boston MA, United States of America

9110.0 kHz NMF United States Coast Guard Boston MA, United States of America
NCEP = National Centers for Environmental Prediction
NHC = National Hurricane Center
OPC = Ocean Prediction Center
WPC = Weather Prediction Center

518.0 kHz UGE Arkhangelsk Radio, Russian Federation
Zaliv = Bay

518.0 kHz LZW Varna Radio, Bulgaria

12666.3 kHz FUM French Navy Papeete, Tahiti, Polynesia (French)
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

518.0 kHz Grimeton Radio, Sweden

8416.5 kHz LGS Svalbard Radio, Spitsbergen, Norway
002570000 is the station's MMSI (Maritime Mobile Service Identity) code

4209.5 kHz XVN Nha Trang Radio, Viet Nam

8431.0 kHz TAH Istanbul Radio, Turkey

518.0 kHz UHY Murmansk Radio, Russian Federation

518.0 kHz ZSC Cape Town Radio, South Africa (Republic of)
ZSJ has been ZAN for many years now ...
SAN = South African Navy

8416.5 kHz VFF Canadian Coast Guard Iqaluit NUN, Canada
MCTS = Marine Communications and Traffic Services
003160023 is the station's MMSI (Maritime Mobile Service Identity) code

8416.5 kHz VFF Canadian Coast Guard Iqaluit NUN, Canada
WVS = World Vector Shoreline

518.0 kHz UUI Odessa Radio, Ukraine

9110.0 kHz NMF United States Coast Guard Boston MA, United States of America
NCEP = National Centers for Environmental Prediction

9110.0 kHz NMF United States Coast Guard Boston MA, United States of America

9110.0 kHz NMF United States Coast Guard Boston MA, United States of America
NCEP = National Centers for Environmental Prediction
OPC = Ocean Prediction Center

518.0 kHz EAL Las Palmas Radio, Canary Islands

518.0 kHz ZSQ Port Elizabeth Radio, South Africa (Republic of)
ZSJ has been ZAN (QRT ...) for many years now ...
SAN = South African Navy

4209.5 kHz XVN Nha Trang Radio, Viet Nam

518.0 kHz 9HD Valetta Radio, Malta
NTM = Notice to Mariners
SOLAS = Safety of Life at Sea
TM = Tele Malta

518.0 kHz XSI Sanya Radio, China
STS = Severe Tropical Storm

518.0 kHz United States Coast Guard Savannah GA, United States of America
BNM = Broadcast Notice to Mariners

16559.0 kHz XSG Shanghai Radio, China
CMA = China Meteorological Administration

16559.0 kHz XSG Shanghai Radio, China
CMA = China Meteorological Administration

16971.0 kHz JJC Kyodo Tsushin Tokyo, Japan

16971.0 kHz JJC Kyodo Tsushin Tokyo, Japan

518.0 kHz Famagusta (?) Radio, Cyprus
This strange new broadcast seems to originate from the Turkish-occupied territory of Cyprus ...
Anyway, time slot E is assigned to Samsun Radio in Turkey

8503.9 kHz NMG United States Coast Guard New Orleans LA, United States of America
NCEP = National Centers for Environmental Prediction

8503.9 kHz NMG United States Coast Guard New Orleans LA, United States of America

13033.0 kHz FUF French Navy Fort de France, Martinique
Adjacent is a CIS-12 PSK signal on 13036.8 kHz ...
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

490.0 kHz CBV Valparaiso Radio, Chile

518.0 kHz SUZ Serapeum Radio, Egypt
BA = British Admiralty
HDD = Horizontal Directional Drilling

518.0 kHz UDN Novorossiysk Radio, Russian Federation

16826.3 kHz XSQ Guangzhou Radio, China
CMA = China Meteorological Administration
MSA = Maritime Safety Administration

518.0 kHz LFO Oerlandet Radio, Norway

518.0 kHz NMO United States Coast Guard Honolulu, Hawaii

518.0 kHz L2G Argentinian Coast Guard Buenos Aires, Argentina

12789.9 kHz NMG United States Coast Guard New Orleans LA, United States of America
NHC = National Hurricane Center

518.0 kHz Igdlutaligssuaq Radio, Kook Island, Greenland
DMI = Danish Meteorological Institute

518.0 kHz VFF Canadian Coast Guard Iqaluit NUN, Canada

16971.0 kHz JJC Kyodo Tsushin Tokyo, Japan
JSC = Japan Ship Centre

13270.0 kHz H06 HFDL Hat Yai Air, Thailand, + flight EY0424 + QTR3J

12750.0 kHz NMF United States Coast Guard Boston MA, United States of America
NCEP = National Centers for Environmental Prediction
NHC = National Hurricane Center

16826.3 kHz XSQ Guangzhou Radio, China
CMA = China Meteorological Administration
MSA = Maritime Safety Administration

10063.0 kHz H11 HFDL Panama City Air, Panama, + aircraft CC-CXG + JA875A + N724NK + N725NK + flight AFR377
AGM = Miscellaneous Air/Ground Message
TI2 = Terminal Information Request
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

12789.9 kHz NMG United States Coast Guard New Orleans LA, United States of America

12789.9 kHz NMG United States Coast Guard New Orleans LA, United States of America
NHC = National Hurricane Center

10063.0 kHz H11 HFDL Panama City Air, Panama, + aircraft N617UP + N944AV + flight AEA088
CFB = Centralized Fault Book
CMC = Central Maintenance Computer
DT = Destination, followed by the runway number
ECS = Environmental Control System
FN = Flight Number
TS = Time Stamp
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FCP = Facilities Contact Response
FMH = Facilities Message Header = Flight Number
• PRG = Flight Progress Report sent shortly
(i.e. 1 hour - 10 minutes) before arrival,
typically including destination airport followed by
estimated runway for landing, estimated FOB, ETA, and FN
• The Altitude Range Change Event is triggered
when the aircraft's altitude exceeds the altitude ceiling
or floor defined in the contract by the ground system
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

14629.2 kHz CTA Portuguese Navy Lisbon, Portugal

518.0 kHz Sellia Marina Radio, Italy

518.0 kHz NMC United States Coast Guard San Francisco CA, United States of America

518.0 kHz 5BA Nicosia Radio, Cyprus
JRCC = Joint Rescue Coordination Centre

16977.0 kHz JFM Muroto Fisheries Radio, Japan
Japanese Morse code ...

16067.7 kHz Ministry of Foreign Affairs Cairo, Egypt
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

16023.7 kHz Egyptian Embassy Washington DC, United States of America, to Ministry of Foreign Affairs Cairo, Egypt

7778.7 kHz 44406 Egyptian Embassy Delhi, India, to 99904 Ministry of Foreign Affairs Cairo, Egypt

State-of-the-art digital data signals have been tested since 2013
by innovative broadcast stations such as the Voice of America ...
Here's a 6067.1 kHz MFSK-16 emission on the lower sideband
of AM station Channel 292 transmitting both sidebands
± 2900 Hz from the carrier frequency 6070.0 kHz
New 2025 edition of our Perseus Frequency Database
now shows utility stations' callsigns as well!

8454.8 kHz FUG French Navy Saissac, France
New 2024 edition of our Perseus Frequency Database
now shows utility stations' callsigns as well!

6095.0 kHz Broadcast (!) radio station KBC, Netherlands via Germany
testing state-of-the-art digital data signals
such as parallel MFSK emissions on 6093.5 and 6096.5 kHz
i.e. on both sidebands ± 1500 Hz from the carrier frequency 6095.0 kHz
New 2023 edition of our Perseus Frequency Database
now shows utility stations' callsigns as well!

18529.5 kHz 7RV50 Algerian Embassy Moscow, Russian Federation, to 7RQ20 Ministry of Foreign Affairs El Djaza'ir, Algeria

18063.3 kHz RC2JAL International Committee of the Red Cross Jalalabad, Afghanistan, via MB1TBI International Committee of the Red Cross Tbilisi, Georgia, to RC2KAB International Committee of the Red Cross Kabul, Afghanistan

13973.0 kHz RC2PES International Committee of the Red Cross Peshawar, Pakistan, via MB1TBI International Committee of the Red Cross Tbilisi, Georgia, to RC2MAZ International Committee of the Red Cross Mazar-e Sherif, Afghanistan