Klingenfuss Hot Frequencies
Hot Frequencies and
Digital Data Transmission Screenshots

The following - very recent! - screenshots have been produced and uploaded to this international pooling webpage by our worldwide net of cooperators, using advanced equipment such as the superb PROCITEC Digital Data Decoders. All frequencies are in kHz, and all system times are UTC. Schedules and traffic details can be found in our 2023/2024 Guide to Utility Radio Stations. Standard aeronautical • meteorological • telecommunication abbreviations and ICAO Airport Codes and Airline Designators can be found everywhere; certain very special procedures and terms - particularly for avionics - are explained hereunder. Latest screenshots on top!


17919.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft EC-NCK + G-VRAY + N238NV + TF-PPC + TF-PPE + flight TS0197
CFB = Centralized Fault Book
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
VSC = Vacuum System Controller
• 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

6559.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft CC-CWY + C-FKSV + HL7626 + HL8259 + N609UP + N618UP + N621UP + N851FD + N885FD + N29985 + flight CES583
Parameters CYVR - YBBN ...
CFB = Centralized Fault Book
CFD = Centralized Fault Data
CL = Center of Lift
ECS = Environmental Control System
PAEW = Personnel and Equipment Working
SCV = Surge Control Valve
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
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

3585.0 kHz HLL8 Soul Meteo, South Korea

3585.0 kHz HLL8 Soul Meteo, South Korea

518.0 kHz CBV Valparaiso Radio, Chile
EGC = Enhanced Group Call
R/V = Research Vessel

8927.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-20E8 + HL7210 + N25982 + VN-A506 + flight CES266 + CXA801
POSREP enroute RPVK - RKPK ...
RPVK is the fastest growing airport in the Philippines
CFB = Centralized Fault Book
CHC = Cargo Heat Controller
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
TI2 = Terminal Information Request
WN = Warning Number, followed by the Date-Time Group
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

9169.0 kHz Digital data station

10084.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft B-1591 + B-2291 + C-FGDZ + JA14VA + JA821P + JA829A + OH-LWF + RPC9934 + flight UAL96 + 2P2869
AGM = Miscellaneous Air/Ground Message
DH = Dead Head
LGTP = Light Plus Turbulence = relatively greater intensity
OCC = Operations Control Centre
PD = Profile Descent
• 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

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 ...

13312.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-LXE + B-325J + B-1168 + B-18918 + JA208P + N862FD + 9V-SCK + 9V-SHV + flight QIA256
AGM = Miscellaneous Air/Ground Message
LGTM = Light Minus Turbulence = relatively weaker intensity
LGTP = Light Plus Turbulence = relatively greater intensity
SCV = Surge Control Valve
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
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 NMQ United States Coast Guard Long Beach CA, United States of America
ASW = Anti-Submarine Warfare
BNM = Broadcast Notice to Mariners
FLETA = Fleet Training Area
LA = Los Angeles
LB = Lighted Buoy
LB = Long Beach
LLNR = Light List Number
LT = Light
SD = San Diego
SOAR = Southern California ASW Range

518.0 kHz Vakalpudi Radio, India
INW = Indian Navigational Warning
MMB = Maharashtra Maritime Board

8927.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-325V + B-1266 + EC-NCK + N107FE + 4R-ALS + 9V-SCK + 9V-SJB + flight PR0424
EC-NCK is a daily shuttle service NZAA - YPPH - NZAA
by Wamos Air on wet lease for Air New Zealand ...
AGM = Miscellaneous Air/Ground Message
DX = Dispatcher
OCC = Operations Control Centre
GOCC = Global Operations Control Center
• 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

6661.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft N573FE + N293UP + N606UP + N632UP + flight VS109V
CFB = Centralized Fault Book
CFD = Centralized Fault Data
CFP = Computerized Flight Plan
ETP = Equitime Point
FMS = Flight Management System
LRC = Long Range Cruise
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

6661.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft B-1566 + B-2037 + CC-BGF + N16008 + TC-LGK + flight UAE69R
CG = Center of Gravity
CI = Consistency Index
FEL = Fuel Estimation Left
FER = Fuel Estimation Right
TI2 = Terminal Information Request
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

518.0 kHz LGQ Rogaland Radio, Norway
DMI = Danish Meteorological Institute
NTM = Notice to Mariners
NW = Navigational Warning

13074.0 kHz JFC Misaki Fisheries Radio, Japan
JAFIC = Japan Fisheries Information Service Center
The date reads 6 3 1 = 2024 March 1
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
Latest tuna market prices ...
The date reads 6 3 1 = 2024 March 1
since the Japanese calendar year in the Reiwa Era is used here
Formula: Reiwa year + 2018 = Gregorian year

11387.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft C-GTSZ + N110FE + SE-DMO + UK78706 + flight ETD5SJ
CFB = Centralized Fault Book
CIDS = Cabin Intercommunication Data System
DFD = Digital Flight Data
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
IPCU = Ice Protection Control Unit
PSCU = Proximity Switch Control Unit
• Air and ground end systems include
(1) Datalink Application Service Element = CPDLC
(2) Aeronautical Telecommunication Network upper layers
(3) TP4 = Transport Protocol Class 4
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
NOAA satellite settings for JRC / FURUNO fish finder equipment ...
The date reads 6 3 1 = 2024 March 1
since the Japanese calendar year in the Reiwa Era is used here
Formula: Reiwa year + 2018 = Gregorian year

11387.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft HZ-NS32 + JY-BAG + flight RJA261
Increasing solar activity - and the ionosphere going totally crazy:
Dispatch uplink for and FR and OPNORM downlink
from a OEGN - OERK local hop across the Rub Al-Khali ... via New York!
AGM = Miscellaneous Air/Ground Message
CFB = Centralized Fault Book
CFDS = Centralized Fault Display System
DA = Departure Airport
DM = Time Stamp
DS = Destination Airport
FR = Fault Report, followed by the Date-Time Group
SDU = Satellite Data Unit

11387.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft UK78706 + flight ACA801

518.0 kHz EJM Irish Coast Guard Malin Head, Ireland

518.0 kHz GPK Portpatrick Radio, United Kingdom
Forsnaval is a site in the Stornoway MCA district
FOSNI = Flag Officer Scotland and Northern Ireland
GUNFACTS = Practice firing intentions by military units
MCA = Maritime and Coastguard Agency
SUBFACTS = Planned or known submarine activity

13312.0 kHz H15 HFDL Muhurroq Air, Bahrain, + aircraft A4O-DA + A6-AEC + A6-ATD + HZ-NS32 + N632UP + SU-GDA + 5Y-KCA + flight AIC143
CFD = Centralized Fault Data
ECS = Environmental Control System
REQPWI = Predicted Wind Request for FL 120
• Engine Cruise Report VCBI - OTHH ...
= 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

13312.0 kHz H15 HFDL Muhurroq Air, Bahrain, + aircraft A6-ATB + A7-AMJ + ES-SAF + ES-SAG + ES-SAZ + ET-ATR + HZ-AQI + SU-GDX + 7O-AFB + 7O-AFE + flight HVN604
AFMS = Aircraft Fuel Management System
CFB = Centralized Fault Book
DA = Departure Airport
DFD = Digital Flight Data
DM = Time Stamp
DS = Destination Airport
FCMC = Fuel Control and Monitoring Computer
FR = Fault Report, followed by the Date-Time Group
RA = Radio Altimeter
REQPWI = Predicted Wind Request for FL 400 380 360 340
TI2 = Terminal Information Request
WN = Warning Number, followed by the Date-Time Group
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
• Engine Cruise Report HECA - OYAA ...
= 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 screenshot, however, the text is not table-formatted;
anyway, standard row identifiers such as CC C0 C1 CE ... can be easily identified after the slash ...

4209.5 (!) kHz NRV United States Coast Guard Apra Harbour, Guam
BNM = Broadcast Notice to Mariners
GU = Guam
ZAN since 2016! Reactivated?

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

7433.5 kHz HLL5 Soul Meteo, South Korea

7433.5 kHz HLL5 Soul Meteo, South Korea

8658.0 kHz JFX Kagoshima Fisheries Radio, Japan
Maritime safety information for NAVAREAs 10/11 ...
MICS = Maritime Information and Communication System
The date reads 6 2 29 = 2024 February 29
since the Japanese calendar year in the Reiwa Era is used here
Formula: Reiwa year + 2018 = Gregorian year

490.0 kHz ICH Italian Coast Guard La Maddalena Island, Italy

490.0 kHz OST Oostende Radio, Belgium

7396.9 kHz HSW64 Bangkok Meteo, Thailand

7396.9 kHz HSW64 Bangkok Meteo, Thailand

6559.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft B-325J + B-1566 + CC-BDC + N434AS + N605UP + N885FD + N76010 + flight KAL085
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
CFD = Centralized Fault Data
ECS = Environmental Control System
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 VAE Canadian Coast Guard Tofino BC, Canada
Amphitrite Point Lighthouse is 40 kilometres south of Tofino ...

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

17928.0 kHz H17 HFDL Telde Air, Canary Islands, + aircraft B-321J + F-WWDW + G-POWK + G-VSXY + HZ-NS63 + N592FE + N627UP + TC-MCM + UK78706 + ZS-SXF + 9V-SHJ + flight GTI805
F-WWDW is an Airbus A350-1041 on specification test flight to become JAL's JA03WJ ...
AA = Arrival Airport
AGM = Miscellaneous Air/Ground Message
CFB = Centralized Fault Book
DA = Departure Airport
DFD = Digital Flight Data
FLR = Failure
FPN = Flight Plan Report downlink
FR = Fault Report, followed by the Date-Time Group
PHC = Probe Heat Computer
TAT = Total Air Temperature
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
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

21955.0 kHz H17 HFDL Telde Air, Canary Islands, + aircraft G-VTOM + SU-GDX + UK78706 + ZS-SXJ + 7T-VJX + flight SU0629
CFB = Centralized Fault Book
DT = Destination, followed by the runway number
FLR = Failure
FN = Flight Number
FR = Fault Report, followed by the Date-Time Group
MDPWI = Meteorological Data - Predicted Wind for FL 360
REQPWI = Predicted Wind Request for FL 360
TS = Time Stamp
WN = Warning Number, followed by the Date-Time Group
ZUR = Zuidafrikaanse Radio = SAA Operations Control Jo'burg
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

13074.0 kHz JFC Misaki Fisheries Radio, Japan
The date reads 6 2 27 = 2024 February 27
since the Japanese calendar year in the Reiwa Era is used here
Formula: Reiwa year + 2018 = Gregorian year

17958.0 kHz H10 HFDL Muan Air, South Korea, + aircraft B-6365 + B-6559 + JA13KZ + JA818A + JA838A + flight CCA190 + CSC316
HNDMAT = Haneda Meteorological Advice Team
LM = Light Minus Turbulence = relatively weaker intensity
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 B-30CX + B-322W + B-7836 + JA215P + N867FD + N896FD + N12012 + 9V-SCK + flight AIC308
AGM = Miscellaneous Air/Ground Message
CFB = Centralized Fault Book
FDE = Fault Detection and Exclusion
FRC = Fault Reporting Code
OCC = Operations Control Centre
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

10084.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft B-20EH + B-306Y + HL7640 + N633UP + N896FD + VH-EXZ + VN-A897 + 9V-SCK + 9V-SHU + flight CES202 + SIA241
Code figures for PANC runways braking action - see e.g. here
A NOTAM decoder can be found e.g. here
FICON = Field Conditions
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FCA = Facilities Contact Advisory
FMH = Facilities Message Header = Flight Number
FRP = Facilities Response
• 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
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 B-5920 + N633UP + N896FD + 9V-SGC + flight UPS61
AFS = Auto Flight System
AGM = Miscellaneous Air/Ground Message
ATSU = Air Traffic Service Unit
CFB = Centralized Fault Book
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
GOCC = Global Operations Control Center
MCDU = Multi-Function Control Display Unit
TTO = Target Time Over
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

8302.0 kHz XSG Shanghai Radio, China
CMA = China Meteorological Administration

8416.5 kHz UAT Moscow Radio, Russian Federation
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

8113.5 kHz RMP Commonwealth of Independent States Navy Kaliningrad, Russian Federation
Local time (e.g. 25 2005) used here since received at 1905 UTC ...

8317.8 kHz Digital data station

518.0 kHz A9M Hamala Radio, Bahrain
Warnings still in force - received 251610Z FEB 2024
BA = British Admiralty
BAPCO = Bahrain Petroleum Company
MENAS = Middle East Navigation Aids Service
MEGULITE = Middle East Gulf Lighting Service

518.0 kHz EQM Bushire Radio, Iran

6661.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft HP1833 + N965AM + 5Y-KZG + flight NK0883 + UAL163
CFB = Centralized Fault Book
CISS =Configurable Integrated Surveillance System
CMCF = Central Maintenance Computing Function
DB = Data Base
EOR = End of Report
FDE = Fault Detection and Exclusion
FRC = Fault Reporting Code
FSM = Flight System Message
NCMM = Network Channel Management Monitor
RNP = Required Navigation Performance
WELS = Wireless Emergency Lighting System
RAIM = Receiver Autonomous Integrity Monitoring
A RAIM prediction ensures that available GNSS signals
meet the integrity for a given phase of flight

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

8416.5 kHz NMC United States Coast Guard San Francisco CA, United States of America

12412.5 kHz NOJ United States Coast Guard Kodiak, Alaska

12412.5 kHz NOJ United States Coast Guard Kodiak, Alaska
NCEP = National Centers for Environmental Prediction

8416.5 kHz NMO United States Coast Guard Honolulu, Hawaii

17967.0 kHz H15 HFDL Muhurroq Air, Bahrain, + aircraft B-6043 + ES-SAZ + HZ-NS63 + RA73108 + RA73156 + RA73306 + SU-GCH + 5Y-CYC + 7O-AFE + 9V-SHQ + flight KNE782
The INRANGE message announces the aircraft being within VHF range of the DS
DFB = Digital Flight Book
DFD = Digital Flight Data
DT = Destination, followed by the runway number
FDE = Fault Detection and Exclusion
FN = Flight Number
GLS = GBAS (Ground-Based Augmentation System) Landing System
IVV = Inertial Vertical Speed
NAIP = National Aeronautical Information Publication
TI2 = Terminal Information Request
VAC = Vertical Acceleration
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

8416.5 kHz L2C Argentinian Coast Guard Buenos Aires, Argentina
L5J = ACG San Isidro on VHF - see here
RDP = Rio de la Plata

17967.0 kHz H15 HFDL Muhurroq Air, Bahrain, + aircraft F-UJCT + RA73108 + RA73306 + SU-GEH + 7O-AFE + flight DP0163
DAR = Data Access Recorder
DFB = Digital Flight Book
FCNT = (DAR) Frame Counter
ISFC = Indicated Specific Fuel Consumption
REQPWI = Predicted Wind Request for FL 280
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

13988.5 kHz JMH4 Tokyo Meteo, Japan

4209.5 kHz XVG Hai Phong Radio, Viet Nam

10084.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft A6-EVP + B-1566 + JA886A + flight SIA37
AOC = Airline Operations Control
HIAL = High Intensity Approach Lights
HIRL = High Intensity Runway Lighting
OMC = Operation Management Center
• 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

21931.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft JA934A + N501DN + N578UP + N863FD + TC-NYP + flight TS0555
CDP = Computer Diagnostics Program
CFB = Centralized Fault Book
DFD = Digital Flight Data
EDP = Engine Display Panel
FWS = Flight Warning System
HPP = High Pressure Pump
SCV = Surge Control Valve
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

490.0 kHz UUI Odessa Radio, Ukraine

5195.0 kHz DRA5 Kiel, Germany

10060.0 kHz H10 HFDL Muan Air, South Korea, + aircraft B-1242 + HL8293 + N862FD + 9V-SGA + 9V-SHK + flight CSC836
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
• Air and ground end systems include
(1) Datalink Application Service Element = CPDLC
(2) Aeronautical Telecommunication Network upper layers
(3) TP4 = Transport Protocol Class 4
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 EQI Abbas Radio, Iran

17967.0 kHz H15 HFDL Muhurroq Air, Bahrain, + aircraft OH-LWB 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

MIAM = Media Independent Aircraft Message
PDU = Pilot Display Unit

4209.5 kHz XVG Hai Phong Radio, Viet Nam

17919.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft OH-LWN enroute RKSI - 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

MIAM = Media Independent Aircraft Message
PDU = Pilot Display Unit
• Engine Cruise Report RKSI - EFHK ...
= 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 screenshot, however, the text is not table-formatted;
anyway, standard row identifiers such as CC C0 C1 CE ... can be easily identified after the slash ...

13276.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft B-2085 + F-WZMZ + JA839A + N608UP + N623UP + 9V-SGB + flight G43233 + KAL262
F-WZMZ is an Airbus A321-200N on demonstration flight around KBFM ...
ATSU = Air Traffic Service Unit
CFB = Centralized Fault Book
CFD = Centralized Fault Data
CFDS = Centralized Fault Display System
DFD = Digital Flight Data
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
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 XSQ Guangzhou Radio, China
MSA = Maritime Safety Administration

10084.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft DQ-FJT + HL7641 + JA10VA + N515DN + flight CES674
AGM = Miscellaneous Air/Ground Message
CFB = Centralized Fault Book
CSU = Command Sensor Unit
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
FWS = Flight Warning System
PES = Passenger Entertainment System
SFCC = Slat Flap Control Computer
SR = Seat Row
• Engine Cruise Report NFFN - WSSS ...
= 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 B-323A + DQ-FJT + HL7641 + HL8282 + JA13VA + JA821P + 9V-SML + flight CES569
LSZH weather request from a NFFN - WSSS flight ...
Enroute data ZYCC - ZLXY ...
AGM = Miscellaneous Air/Ground Message
DFB = Digital Flight Book
OTP = On Top
• Air and ground end systems include
(1) Datalink Application Service Element = CPDLC
(2) Aeronautical Telecommunication Network upper layers
(3) TP4 = Transport Protocol Class 4
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 CS-TJM + TF-PPE + 9V-SGC + flight V746VE
ATOW = Actual Take-Off Weight
AVIH = Animal Vivant in Hold
DOW = Dry Operating Weight
SI = Supplementary Information
TOMAC = Take-Off Mean Aerodynamic Chord
ZFMAC = Zero Fuel Mean Aerodynamic Chord
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
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 TF-PPE + flight UZB603
PDU = Pilot Display Unit
• 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 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

8942.0 kHz H07 HFDL Shannon Air, Ireland, + aircraft B-302Q + B-2079 + B-8332 + RA73128 + RA73160 + RA73779 + flight BA2566
ADIRU = Air Data Inertial Reference Unit
AFS = Auto Flight System
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

4209.5 kHz TAH Istanbul Radio, Turkey
Warnings still in force - received 201800Z FEB 2024

8677.0 kHz CBV Valparaiso Radio, Chile
The chart is incomplete ...
GFS = Global Forecast System

7795.0 kHz JMH2 Tokyo Meteo, Japan

7795.0 kHz JMH2 Tokyo Meteo, Japan

8424.0 kHz SVO Olympia Radio, Athens, Greece

8151.0 kHz IDR Italian Navy Rome, Italy

21928.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-325Z + B-6323 + B-6361 + JA219A + JA807A + JA818A + 9V-SMC + flight CAO108
FSM = Flight System Message
RCD = Request for 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

16898.5 kHz XSG Shanghai Radio, China
Presumably local time used here since received at 0450 UTC ...

16898.5 kHz XSG Shanghai Radio, China
MSA = Maritime Safety Administration

13351.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft B-18902 + B-18905 + HL7640 + JA203P + PK-SJZ + 9V-SMQ + flight SIA37
ADIRU = Air Data Inertial Reference Unit
AGM = Miscellaneous Air/Ground Message
CFB = Centralized Fault Book
EFCS = Electronic Flight Control System
ELAC = Elevator Aileron Computer
FCDC = Flight Control Data Concentrator
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
IR = Inertial Reference
OCC = 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

518.0 kHz NOJ United States Coast Guard Kodiak, Alaska
PKZ = AK Arctic

11318.0 kHz H13 HFDL Santa Cruz Air, Bolivia, + aircraft CC-CWY + CN-RGZ + PR-TYK + PR-TYQ + 9H-NEE + flight ACA90
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
CCO = Operations Control Centre
FCD = Flight Control Data

518.0 kHz UGE Arkhangelsk Radio, Russian Federation

518.0 kHz Gislovshammar Radio, Sweden

11387.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft SE-DMR + 70029B + flight UAL79
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
FCP = Facilities Contact Response
FMH = Facilities Message Header = Flight Number
FPO = Facilities Current Position
FRP = Facilities Response
• Engine Cruise Report EKCH - KIAD ...
= 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 screenshot, 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

10030.0 kHz H15 HFDL Muhurroq Air, Bahrain, + aircraft B-324H + EI-KGC + HZ-NS54 + RA73093 + RA73754 + SU-GCP + SU-GEK + 7T-VJV + 9V-SMA + flight THY265
POSREP = POS, WP, ATO, FL, next+1 WP, ETO, next+2 WP,
ETO, temperature, wind, FOB or SOG, time stamp, date, HEX serial
DT = Destination, followed by the runway number
FN = Flight Number
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

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, + flight CES544 + HVN143

17958.0 kHz H10 HFDL Muan Air, South Korea, + aircraft B-30C1 + B-5953 + B-6601 + JA833A + 3B-NCL + flight CSC835
PDC = Pre-Departure Clearance
TI2 = Terminal Information Request
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
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
NHC = National Hurricane Center

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

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

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

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

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

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

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

8939.0 kHz H10 HFDL Muan Air, South Korea, + aircraft B-1072 + B-18909 + JA802A + N510DN + N574UP + N709AL + 9M-MAG + flight SIA36
AA = Arrival Airport
AI = Arrival Information
CFB = Centralized Fault Book
DA = Departure Airport
DI = Departure Information
DT = Destination, followed by the runway number
EFF = Electronic Flight Folder
GC = Ground Connections
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

8939.0 kHz H10 HFDL Muan Air, South Korea, + flight AMX058 + KZR963

11030.0 kHz VMC Charleville Meteo QLD, Australia

5100.0 kHz VMC Charleville Meteo QLD, Australia

518.0 kHz JNR Moji Radio, Japan
LL = Light List

518.0 kHz JNB Naha Radio, Okinawa Island, Japan

13276.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft B-LXD + B-7838 + C-FVLX + JA894A + N856FD + N958AK + flight UAL243
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 UFO Kholmsk Radio FE, Russian Federation
Proliv = Strait

518.0 kHz Chukpy Radio, South Korea
JCS = Joint Chiefs of Staff

17916.0 kHz H13 HFDL Santa Cruz Air, Bolivia, + aircraft A6-BND + A7-API + N965AM + PR-TYP + PR-TYS + PR-YYC + ZS-SXJ + flight ACA90
POSREP = POS, WP, ATO, FL, next+1 WP, ETO, next+2 WP,
ETO, temperature, wind, FOB or SOG, time stamp, date, HEX serial
PDU = Pilot Display Unit
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

3622.5 kHz JMH Tokyo Meteo, Japan

10027.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft VN-A862 + flight CPA870
Increasing solar activity - and the ionosphere going totally crazy:
ATIS uplink and enroute data / POSREP downlink to and from a EDDF - VVNB flight ... via Hawaii!
DFB = Digital Flight Book
TI2 = Terminal Information Request

12579.0 kHz NRV United States Coast Guard Apra Harbour, Guam
ITCZ = Inter-Tropical Convergence Zone
ZAN since 2016! Reactivated?

2998.0 kHz H07 HFDL Shannon Air, Ireland, + aircraft B-18907 + EC-MNS + N574UP + N26909 + RA73194 + RA73779 + 9H-NEE + flight QTR17B + QTR42H
ADIRU = Air Data Inertial Reference Unit
AI = Arrival Information
CFB = Centralized Fault Book
CFD = Centralized Fault Data
DI = Departure Information
ECAM = Electronic Centralized Aircraft Monitoring
ECS = Environmental Control System
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
GC = Ground Connections
MDPWI = Meteorological Data - Predicted Wind for FL 430 390
PHC = Probe Heat Computer
SDAC = System Data Acquisition Computer
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

490.0 kHz Hamburg Meteo, Germany
NCC = National Co-Ordination Centre
VTG = Verkehrstrennungsgebiet

490.0 kHz GNI Niton Radio, United Kingdom

490.0 kHz 9AS Split Radio, Croatia

4209.5 kHz XVN Nha Trang Radio, Viet Nam
Warnings still in force - received 140020Z FEB 2024

16976.0 kHz PWZ Brazilian Navy Rio de Janeiro, Brazil
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

8939.0 kHz H10 HFDL Muan Air, South Korea, + aircraft B-6778 + N101FE + N867FD + N965AM + 9V-SKQ + 9V-SMA + flight CCA251
POSREP = POS, WP, ATO, FL, next+1 WP, ETO, next+2 WP,
ETO, temperature, wind, FOB or SOG, time stamp, date, HEX serial
DFD = Digital Flight Data
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
• 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

4209.5 kHz XVN Nha Trang Radio, Viet Nam
Warnings still in force - received 131620Z FEB 2024
DWT = Dead Weight Tonnage

21928.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft JA209P + JA219A + 9V-SGB + 9V-SHR + flight CES217
AGM = Miscellaneous Air/Ground Message
• Air and ground end systems include
(1) Datalink Application Service Element = CPDLC
(2) Aeronautical Telecommunication Network upper layers
(3) TP4 = Transport Protocol Class 4
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

16971.0 kHz JJC Kyodo Tsushin Tokyo, Japan

16971.0 kHz JJC Kyodo Tsushin Tokyo, Japan

13270.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft B-32FQ + B-326V + B-18902 + HS-XTH + 9V-SHR + 9V-SMR + flight SIA708
Code figures for WSSS runways braking action - see e.g. here
RSCD = Runway Surface Condition
RWYCC = Runway Condition Code
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

13270.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft A7-ALD + B-32FQ + B-1567 + B-18912 + C-FIUJ + 9V-SMO + flight CES618
DCL = Departure Clearance
PD = Profile Descent
TI2 = Terminal Information Request
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
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

8418.2 (not 8416.5!) kHz L2C Argentinian Coast Guard Buenos Aires, Argentina

518.0 kHz SVH Iraklion Radio, Greece
FORACS = Naval Forces Sensor and Weapons Accuracy Check Sites

13324.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft B-32AW + N510DN + N621UP + N850FD + flight DAL26
AFS = Auto Flight System
CFB = Centralized Fault Book
DFD = Digital Flight Data
FAC = Flight Augmentation Computer
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
TAWS = Terrain Avoidance and Warning System
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 ESA Tallinn Radio, Estonia
PET = Saint Petersburg

13324.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft B-20D7 + JA15KZ + N453PA + N865FD + VN-A862 + 9V-SKZ + 55151A + flight AAR211
En-Route engine data ...
MCFAMC = United States Military Air Mobility Command
RCH556 = United States Military Command Flight MC556
DC = Date-Time Code
FOC = Flight Operations Control
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FCP = Facilities Contact 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 Balasore Radio, India
IMD = India Meteorological Department
INW = Indian Navigational Warning
MMB = Maharashtra Maritime Board

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

518.0 kHz NMF United States Coast Guard Boston MA, United States of America
BNM = Broadcast Notice to Mariners
LB = Lighted Buoy
LLNR = Light List Number

518.0 kHz ZBM Hamilton Harbour Radio, Bermuda
NTM = Notice to Mariners

13324.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft A6-EIW + B-309F + B-326C + ES-SAZ + RA73679 + flight AAR272
Increasing solar activity - and the ionosphere going totally crazy:
Downlink from a UHHH - UHMM local hop across the Sea of Okhotsk ... via Hawaii!
AGM = Miscellaneous Air/Ground Message
DFD = Digital Flight Data
MDPWI = Meteorological Data - Predicted Wind for FL 390 370 350 330
TI2 = Terminal Information Request

518.0 kHz UFL Vladivostok Radio SE, Russian Federation

518.0 kHz XSG Shanghai Radio, China
CGCS = China Geodetic Coordinate System
MSA = Maritime Safety Administration

2054.0 kHz NOJ United States Coast Guard Kodiak, Alaska

13276.0 kHz H01 HFDL San Francisco Air CA, United States of America, + flight SIA27

13377.8 kHz Digital data station

518.0 kHz UDN Novorossiysk Radio, Russian Federation

13270.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft B-322W + B-18907 + TC-LGE + VN-A623 + VT-BXA + 9V-SCW + flight UAE7DK
Engine settings VIJP - VOBL ...
Code figures for EHAM runways braking action - see e.g. here
AGM = Miscellaneous Air/Ground Message
APM = Aircraft Performance Monitoring
DFB = Digital Flight Book
RCR = Runway Condition Report
REQPWI = Predicted Wind Request for FL 280
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
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
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

13270.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft B-306D + B-320H + B-5840 + ER00007 + 9V-SMZ + flight HVN491
Enroute data ZSNJ - VTBS ...
AFS = Auto Flight System
CFB = Centralized Fault Book
DA = Departure Airport
DM = Time Stamp
DS = Destination Airport
ECAM = Electronic Centralized Aircraft Monitoring
EIU = Engine Interface Unit
FADEC = Full Authority Digital Engine Control
FMGC = Flight Management and Guidance Computer
FQI = Fuel Quantity Indication
FR = Fault Report, followed by the Date-Time Group
FWC = Flight Warning Computer
LGCIU = Landing Gear Control Interface Unit
MCDU = Multi-Function Control Display Unit
PD = Profile Descent
TS = Time Stamp
TI2 = Terminal Information Request
WN = Warning Number, followed by the Date-Time Group
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 Sellia Marina Radio, Italy
RSV = Remote Survey Vehicle
TMG = Tempo Medio di Greenwich

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

5720.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft CN-ROZ + EI-GEY + N582FE + XA-DHN + flight VIR449
LEMD - MMMX L/R engine settings ...
AGM = Miscellaneous Air/Ground Message
DFD = Digital Flight Data
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
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

8412.5 kHz XSQ Guangzhou Radio, China
CMA = China Meteorological Administration
MSA = Maritime Safety Administration

4209.5 kHz XVG Hai Phong Radio, Viet Nam

6559.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft B-LXN + B-18907 + LV-KHU + N503DN + N515DN + N580UP + N609UP + flight AAR202
A NOTAM decoder can be found e.g. here
Code figures for PANC runways braking action - see e.g. here
AMDAR = Aircraft Meteorological Data Relay SAEZ - MMUN
CFD = Centralized Fault Data
ECS = Environmental Control System
FCRM = Flight Control Remote Module
FICON = Field Conditions
FRC = Fault Reporting Code
IRF = Incident Report Form
MCC = Maintenance Control Center
MTC = Maintenance Technical Center
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 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 C-FRTW + N457AS + N973AK + flight CMB302
PANC - PHNL cruise data ...
DFB = Digital Flight Book
DT = Destination, followed by the runway number
FN = 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

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

7646.0 kHz DDH7 Hamburg Meteo, Germany
TSS = Traffic Separation Scheme
VTG = Verkehrstrennungsgebiet

7646.0 kHz DDH7 Hamburg Meteo, Germany

21949.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft A7-ANT + B-30DS + B-307E + B-2300 ES-SAZ + PK-GMA + TC-LGO + flight SIA623
ZULS is at 3570 metres altitude, note the 34 degrees temperature difference ...
TI2 = Terminal Information Request
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
• Air and ground end systems include
(1) Datalink Application Service Element = CPDLC
(2) Aeronautical Telecommunication Network upper layers
(3) TP4 = Transport Protocol Class 4
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

7795.0 kHz JMH2 Tokyo Meteo, Japan

3585.0 kHz HLL8 Soul Meteo, South Korea
GK2A = GEO KOMP 2A = Geostationary Korea Multi Purpose Satellite
KMA = Korea Meteorological Administration

518.0 kHz Grimeton Radio, Sweden

8427.0 kHz KPH San Francisco Radio CA, United States of America

8427.0 kHz KPH San Francisco Radio CA, United States of America
MEBA = Marine Engineer's Beneficial Association
MMP = Masters, Mates and Pilots

8427.0 kHz KPH San Francisco Radio CA, United States of America
MITAGS = Maritime Institute of Technology and Graduate Studies
MMP = Masters, Mates and Pilots

518.0 kHz EAL Las Palmas Radio, Canary Islands
TSS = Traffic Separation Scheme

10027.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft B-18907 + JA204P + N896FD + flight CES561
AGM = Miscellaneous Air/Ground Message
LGTP = Light Plus Turbulence = relatively greater intensity
OCC = 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

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

13312.0 kHz H15 HFDL Muhurroq Air, Bahrain, + aircraft A6-XWB + A7-ALQ + ES-SAG + HZ-NS24 + HZ-NS43 + VT-ANW + 5Y-CYA + 9N-ALM + 9V-SCG + 9V-SHL + flight CPA748
EGLL - VABB L/R engine settings ...
DFB = Digital Flight Book
DFD = Digital Flight Data
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

12711.0 kHz PWZ Brazilian Navy Rio de Janeiro, Brazil
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

6559.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft N628UP + flight CES589 + UPS32
A NOTAM decoder can be found e.g. here
Code figures for PANC runways braking action - see e.g. here
FICON = Field Conditions

11318.0 kHz H13 HFDL Santa Cruz Air, Bolivia, + aircraft N487AS + N940AV + PR-YYC + PR-YYK + RA73107 + flight LP2476
Increasing solar activity - and the ionosphere going totally crazy:
Descent data downlink from a UUEE - UNKL domestic flight ... via Santa Cruz!
DFB = Digital Flight Book
REQPWI = Predicted Wind Request for FL 380

8658.0 kHz JFX Kagoshima Fisheries Radio, Japan
The date reads 6 2 2 = 2024 February 2
since the Japanese calendar year in the Reiwa Era is used here
Formula: Reiwa year + 2018 = Gregorian year

11306.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-320N + B-5928 + B-8019 + JA824P + N570UP + 9V-SGF + 9V-SHE + flight UAL29
DCL = Departure Clearance
TI2 = Terminal Information Request
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAK = Facilities Acknowledgement Message
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response CPDLC
FCA = Facilities Contact Advisory
FMH = Facilities Message Header = Flight Number
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

11306.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-304D + HL8099 + JA825A + N504DN + N573FE + N573UP + N611UP + N618UP + flight CSN354
CDP = Computer Diagnostics Program
DFD = Digital Flight Data
EDP = Engine Display Panel
FWS = Flight Warning System
HPP = High Pressure Pump
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

6619.0 kHz H10 HFDL Muan Air, South Korea, + aircraft B-LRD + JA18KZ + N884FD + flight CSC804
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

6619.0 kHz H10 HFDL Muan Air, South Korea, + aircraft B-1243 + EI-TYA + HS-XTH + N852FD + flight CSC316 + CSN335
DEST BURN + ALTN + RESERVE + HOLD = MIN RQD + RPF + OTHER = TKOF + TAXI = TTL FOB
AGM = Miscellaneous Air/Ground Message
CFB = Centralized Fault Book
FLR = Failure
FOD = Fuel Over Destination
FR = Fault Report, followed by the Date-Time Group
GOCC = Global Operations Control Center
MFWF = Minimum Flight Weight Fuel
PSCU = Proximity Switch Control Unit
RPF = Reliability Protection Fuel
SCV = Surge Control Valve
TI2 = Terminal Information Request

518.0 kHz LFO Oerlandet Radio, Norway

4298.0 kHz NOJ United States Coast Guard Kodiak, Alaska

10084.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft B-322H enroute YMML - 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
MIAM = Media Independent Aircraft Message
MSN = Manufacturer's Serial Number
PDU = Pilot Display Unit
RTR = Ready To Receive
VTS = Vacuum Toilet Service

3585.0 kHz HLL8 Soul Meteo, South Korea

3585.0 kHz HLL8 Soul Meteo, South Korea

518.0 kHz VAU Canadian Coast Guard Chebogue NS, Canada

518.0 kHz VCO Canadian Coast Guard Port Caledonia NS, Canada

518.0 kHz VBR Canadian Coast Guard Ferndale ONT, Canada

9165.0 kHz HLL Soul Meteo, South Korea

10081.0 kHz H07 HFDL Shannon Air, Ireland, + aircraft CN-ROH + CN-ROT + F-HJAZ + G-VGEM + SU-GCN + flight SU1602
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
DT = Destination, followed by the runway number
FN = Flight Number
TI2 = Terminal Information Request
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
• Engine Cruise Report TAPA - 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 ...
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

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

6619.0 kHz H10 HFDL Muan Air, South Korea, + aircraft B-LRV + B-1297 + N616UP + N853FD + 9V-SHP + flight CSC316
Code figures for VHHH runways braking action - see e.g. here
The INRANGE message announces the aircraft being within VHF range of the DS
AGM = Miscellaneous Air/Ground Message
DS = Destination Airport
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

11306.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-32DZ + B-304D + B-326V + B-6321 + B-18908 + HL8082 + JA822P + JA933A + N503DN + N860FD + flight APJ456
AGM = Miscellaneous Air/Ground Message
CDP = Computer Diagnostics Program
DFD = Digital Flight Data
EDP = Engine Display Panel
FWS = Flight Warning System
PDC = Pre-Departure Clearance
TI2 = Terminal Information Request
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FCA = Facilities Contact Advisory
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

10555.0 kHz VMW Wiluna Meteo WA, Australia
MSLP = Mean Sea Level Pressure
RSMC = Regional Specialized Meteorological Centre

21928.0 kHz H16 HFDL Barrigada Air, Guam, + flight APJ27 + GTI855

16907.5 kHz JFA Funabashi Fisheries Radio, Japan

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!!!

518.0 kHz Sandakan Radio, Sabah, Malaysia
First Category = Sungai Sarawak - Sungai Sadong - Sungai Lundu
Second Category = Sungai Batang Lupar
Third Category = Sungai Regang up to Brunei
NTM = Notice to Mariners

518.0 kHz XSQ Guangzhou Radio, China
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!!!

Communist China's criminal territorial claim across the South China Sea
all the way down to the shores of Indonesia ...
"Absurd 'historic rights' over everything inside the line."
The Economist, 23 September 2023, page 46
Click to enlarge!

490.0 kHz GCC Cullercoats Radio, United Kingdom

22462.8 kHz FUJ French Navy Noumea, New Caledonia

7433.5 kHz HLL5 Soul Meteo, South Korea

10063.0 kHz H11 HFDL Panama City Air, Panama, + aircraft N595FE + N954AV + N955AV + N987NK + TF-PPE + flight LAN572
AGM = Miscellaneous Air/Ground Message
DT = Destination, followed by the runway number
FN = Flight Number
TOCG = Take Off Centre of Gravity
ZFCG = Zero Fuel Centre of Gravity
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 kHz Parangipettai Radio, India
IMD = India Meteorological Department

17967.0 kHz H15 HFDL Muhurroq Air, Bahrain, + aircraft ET-AYM + HZ-NE22 + 5H-TCO + 9V-SHA + 9V-SHL + flight IRA711
CDP = Computer Diagnostics Program
DFD = Digital Flight Data
EDP = Engine Display Panel
FWS = Flight Warning System
TI2 = Terminal Information Request
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAK = Facilities Acknowledgement Message
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response CPDLC
FCO ADS = Facilities Contact ADS-C
FCO ATC = Facilities Contact CPDLC
FMH = Facilities Message Header = Flight Number
FPO = Facilities Current Position
• Air and ground end systems include
(1) Datalink Application Service Element = CPDLC
(2) Aeronautical Telecommunication Network upper layers
(3) TP4 = Transport Protocol Class 4
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

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 XVN Nha Trang Radio, Viet Nam

518.0 kHz JNX Kushiro Radio, Japan

5720.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft B-1083 enroute ZSPD - LIMC
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

GNSS = Global Navigation Satellite System
IR = Inertial Reference
MIAM = Media Independent Aircraft Message
MMR = Multi-Mode Receiver
PDU = Pilot Display Unit
RTR = Ready To Receive

5720.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft A6-XWB + C-GUBT + OH-LWI + OH-LWR + XA-DHN + YU-ARB + flight QTR005
LEMD - MMMX L/R engine settings ...
POSREP = POS, WP, ATO, FL, next+1 WP, ETO, next+2 WP,
ETO, temperature, wind, FOB or SOG, time stamp, date, HEX serial
TI2 = Terminal Information Request
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAK = Facilities Acknowledgement Message
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response CPDLC
FCO ADS = Facilities Contact ADS-C
FCO ATC = Facilities Contact CPDLC
FMH = Facilities Message Header = Flight Number
FPO = Facilities Current Position
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

5720.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft B-7800 + CN-RGY + CN-ROA + N864FD + OH-LWR + TC-MCN + flight KAL946
AGM = Miscellaneous Air/Ground Message
CCO = Operations Control Centre
CFB = Centralized Fault Book
EOR = End of Report
FDE = Fault Detection and Exclusion
SCV = Surge Control Valve
• Engine Cruise Report KJFK - LTFM ...
= 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

5720.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft A7-ALY + CN-RAM + N842FD + OH-LWK + YR-WIN + flight DP6856
AFS = Auto Flight System
CFB = Centralized Fault Book
CFDS = Centralized Fault Display System
ECAM = Electronic Centralized Aircraft Monitoring
EFCS = Electronic Flight Control System
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
TPIS = Tire Pressure Indicator System
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

10063.0 kHz H11 HFDL Panama City Air, Panama, + aircraft LV-KHU + N702NK + N946AV + N956AV + 9H-SWM + flight GTI822
AMDAR = Aircraft Meteorological Data Relay SAEZ - MDPC
AGM = Miscellaneous Air/Ground Message
DFB = Digital Flight Book
DT = Destination, followed by the runway number
FN = Flight Number
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

4610.0 kHz GYA Royal Navy London, United Kingdom

4610.0 kHz GYA Royal Navy London, United Kingdom

13324.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft B-20AA + 5H-TCO + 5Y-KYF + flight SIA36
Increasing solar activity - and the ionosphere going totally crazy:
CPDLC downlink from a OMDW - HTDA regional hop ... via Hawaii!
Increasing solar activity - and the ionosphere going totally crazy:
OPNORM confirmation uplink for a HKJK - VABB international flight across the Arabian Sea ... via Hawaii!
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
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

518.0 kHz PKX Jakarta Radio, Indonesia
IPS = Integrated Power Supply
TC = Tropical Cyclone

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

518.0 kHz 9MG Georgetown Radio, Pinang Island, Malaysia
RLB = Resilient Light Beacon

8894.0 kHz H11 HFDL Panama City Air, Panama, + aircraft N591FE + N748AV + flight AVA248 + LAN532
AGM = Miscellaneous Air/Ground Message
DT = Destination, followed by the runway number
FN = Flight Number
PDC = Pre-Departure Clearance
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

6619.0 kHz H10 HFDL Muan Air, South Korea, + aircraft A7-ANI + B-20A2 + B-32AH + B-2091 + B-7836 + B-7838 + G-DHLK + flight FX5604
POSREP = POS, WP, ATO, FL, next+1 WP, ETO, next+2 WP,
ETO, temperature, wind, FOB or SOG, time stamp, date, HEX serial
BLDV = Bleed Valve
DA = Decision Altitude
DFB = Digital Flight Book
DFD = Digital Flight Data
EGT = Exhaust Gas Temperature
EPR = Engine Pressure Ratio
FCNT = (DAR) Frame Counter
FF = Fuel Flow (for engines 1 + 2)
FMC = Flight Management Computer
HPV = High Pressure Valve
IRS = Inertial Reference System
ISFC = Indicated Specific Fuel Consumption
ISOV = Isolation Valve
IVV = Inertial Vertical Speed
N2DOT = High Pressure Shaft Acceleration
TCC = Turbine Case Cooling
VSV = Vacuum Switching Valve
WF / PB = Fuel Flow versus Burner Pressure
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAK = Facilities Acknowledgement Message
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response CPDLC
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

3622.5 kHz JMH Tokyo Meteo, Japan

13303.0 kHz H17 HFDL Telde Air, Canary Islands, + aircraft CN-ROK + N702NK + PR-TYK + 5Y-CYA + flight FDX2
AGM = Miscellaneous Air/Ground Message

3951.3 kHz Digital data station

518.0 kHz XVS Ho Chi Minh City Radio, Viet Nam

8480.3 kHz FUF French Navy Fort de France, Martinique
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

518.0 kHz HZH Jeddah Radio, Saudi Arabia
AUV = Autonomous Underwater Vehicle

21955.0 kHz H17 HFDL Telde Air, Canary Islands, + aircraft CN-RGM + CN-RGX + CN-RGY + CN-ROJ + EI-TYA + N819CA + PR-YYJ + SU-GCN + SU-GEN + 5A-LAK + flight AFR268
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
BJR = Bonjour
CDB = Commandant Du Bord
CCO = Operations Control Centre
MDPWI = Meteorological Data - Predicted Wind for FL 370
REQPWI = Predicted Wind Request for FL 370
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAK = Facilities Acknowledgement Message
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response CPDLC
FCO ADS = Facilities Contact ADS-C
FCO ATC = Facilities Contact CPDLC
FMH = Facilities Message Header = Flight Number
FPO = Facilities Current Position
• Air and ground end systems include
(1) Datalink Application Service Element = CPDLC
(2) Aeronautical Telecommunication Network upper layers
(3) TP4 = Transport Protocol Class 4
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 VOK Canadian Coast Guard Cartwright NFLD, Canada

518.0 kHz Igdlutaligssuaq Radio, Kook Island, Greenland

4235.0 kHz NMF United States Coast Guard Boston MA, United States of America
NCEP = National Centers for Environmental Prediction

3900.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft G-ECLN + G-VUFO + TC-MCN + 7T-VJZ + flight AMX005
CFB = Centralized Fault Book
CIDS = Cabin Intercommunication Data System
DT = Destination, followed by the runway number
FLR = Failure
FN = Flight Number
FR = Fault Report, followed by the Date-Time Group
PES = Passenger Entertainment System
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

6565.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft B-30A6 + B-30FA + B-1566 + N509DN + N583UP + N624UP + N632UP + N26967 + flight MU2528
AGM = Miscellaneous Air/Ground Message
• 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 airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
• Air and ground end systems include
(1) Datalink Application Service Element = CPDLC
(2) Aeronautical Telecommunication Network upper layers
(3) TP4 = Transport Protocol Class 4
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

8682.0 kHz NMC United States Coast Guard San Francisco CA, United States of America
NHC = National Hurricane Center

8682.0 kHz NMC United States Coast Guard San Francisco CA, United States of America

3855.0 kHz DDH3 Hamburg Meteo, Germany
ICOM = Integrated Coastal Modeling

8416.5 kHz NMO United States Coast Guard Honolulu, Hawaii

518.0 kHz Izmir Radio, Turkey
Warnings still in force - received 092120Z JAN 2024

4209.5 kHz XVG Hai Phong Radio, Viet Nam

11318.0 kHz H13 HFDL Santa Cruz Air, Bolivia, + aircraft B-LXM + PR-TYT + PR-TYV + PR-YYK + PR-YYL + RPC8612 + RPC8786 + RPC9934 + flight VIR11B
POSREP = POS, WP, ATO, FL, next+1 WP, ETO, next+2 WP,
ETO, temperature, wind, FOB or SOG, time stamp, date, HEX serial
AA = Arrival Airport
AGM = Miscellaneous Air/Ground Message
CFB = Centralized Fault Book
CFDS = Centralized Fault Display System
DA = Departure Airport
ECAM = Electronic Centralized Aircraft Monitoring
EFCS = Electronic Flight Control System
FLR = Failure
FPN = Flight Plan Report downlink
FR = Fault Report, followed by the Date-Time Group
IR = Inertial Reference
SFCC = Slat Flap Control Computer
TS = Time Stamp
WN = Warning Number, followed by the Date-Time Group
• 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 CBP Puerto Montt Radio, Chile

518.0 kHz CBT Talcahuano Radio, Chile

6565.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft JA201P + JA220A + N501DN + flight MCKY96
PASY is an ETOPS emergency alternate airport in the Alaskan Aleutian Islands
for trans-Pacific flights ... RWY 10/28 is 3049 metres long
AGM = Miscellaneous Air/Ground Message
LGTP = Light Plus Turbulence = relatively greater intensity

518.0 kHz Keating Point Radio, Andaman Islands, India
INW = Indian Navigational Warning
MMB = Maharashtra Maritime Board

518.0 kHz 9WW21 Miri Radio, Sarawak, Malaysia
First Category = Sungai Sarawak - Sungai Sadong - Sungai Lundu
Second Category = Sungai Batang Lupar
Third Category = Sungai Regang up to Brunei

518.0 kHz SUK Quseir Radio, Egypt
ADES = Advanced Energy Systems
ADMARINE = Jackup Rig operated by ADES
BA = British Admiralty
EAFMS = Egyptian Authority for Maritime Safety
This is the former PLA (Ports and Lighthouses Administration) ...
OSOCO = Offshore Shukerir Oil Company

518.0 kHz IQM Mondolfo Radio, Italy
VTS = Vessel Traffic Service

518.0 kHz 4XO Haifa Radio, Israel
BA = British Admiralty
IMOT = Israel Ministry of Transport and Road Safety
NTM = Notice to Mariners

518.0 kHz SUZ Serapeum Radio, Egypt
ADES = Advanced Energy Systems
ADMARINE = Jackup Rig operated by ADES
BA = British Admiralty

16135.0 kHz KVM70 Honolulu Meteo, Hawaii
NCEP = National Centers for Environmental Prediction
NHC = National Hurricane Center
OPC = Ocean Prediction Center
WPC = Weather Prediction Center

16135.0 kHz KVM70 Honolulu Meteo, Hawaii

518.0 kHz JGC Yokohama Radio, Japan

8977.0 kHz H03 HFDL Reykjavik Air, Iceland, + flight AEA051 + QTR67H

6565.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft B-222N + B-2098 + B-5729 + B-7838 + JA218A + N861FD + N890FD + flight KAL214
AOC = Airline Operations Control
CFD = Centralized Fault Data
SCV = Surge Control Valve
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

486.0 kHz XSG Shanghai Radio, China
Chinese teleprinter code after Latin alphabet header
According to this NAVAREA 11 document, XSG uses indeed
transmitter identification character Q on both 518 and 486 kHz

518.0 kHz Porto Santo Radio, Madeira
CENCOMAR = Centro de Comunicacao de Dados e Cifra da Marinha
CLCM = Companhia Logistica de Combustiveis da Madeira

518.0 kHz OXF Simiutaq Radio, Greenland

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

518.0 kHz CTV Portuguese Navy Lisbon, Portugal
CENCOMAR = Centro de Comunicacao de Dados e Cifra da Marinha

11318.0 kHz H13 HFDL Santa Cruz Air, Bolivia, + aircraft B-8502 + CN-ROU + N517DZ + PR-TYM + PR-TYQ + PR-YYL + flight 7CFBZ5
Increasing solar activity - and the ionosphere going totally crazy:
METAR uplink for a ZSPD - ZGZJ domestic 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
AA = Arrival Airport
AGM = Miscellaneous Air/Ground Message
DA = Departure Airport
FPN = Flight Plan Report downlink
TI2 = Terminal Information Request
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

5720.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft CN-ROJ + CN-ROR + HZ-AQJ + JY-AYR + 5A-WLA + 7T-VJA + flight AC0859 + AFR137
AGM = Miscellaneous Air/Ground Message
CCO = Operations Control Centre
CDSS = Cockpit Door Surveillance System
CDSU = Cockpit Door Surveillance Unit
CFB = Centralized Fault Book
CIDS = Cabin Intercommunication Data System
DT = Destination, followed by the runway number
FLR = Failure
FN = Flight Number
FR = Fault Report, followed by the Date-Time Group
IFE = In-Flight Entertainment
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

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

518.0 kHz XVT Da Nang Radio, Viet Nam

12579.0 kHz UAT Moscow Radio, Russian Federation

21982.0 kHz H15 HFDL Muhurroq Air, Bahrain, + flight CES568 + KN2875

518.0 kHz LZW Varna Radio, Bulgaria

518.0 kHz 9HD Valetta Radio, Malta
NTM = Notice to Mariners

518.0 kHz EAV Valencia Radio, Spain

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

4209.5 kHz SVH Iraklion Radio, Greece

4209.5 kHz TAH Istanbul Radio, Turkey

10081.0 kHz H07 HFDL Shannon Air, Ireland, + flight AT0649 + AT851W

12579.0 kHz NMF United States Coast Guard Boston MA, United States of America
NGA = National Geospatial-Intelligence Agency

17151.2 kHz NMC United States Coast Guard San Francisco CA, United States of America
ITCZ = Inter-Tropical Convergence Zone

8942.0 kHz H07 HFDL Shannon Air, Ireland, + aircraft G-VPOP + OD-MRR + RA73273 + VP-BXP + flight SN074C
Typical Airbus XML format ...
CFB = Centralized Fault Book
CFDS = Centralized Fault Display System
CMS = Central Maintenance System
DA = Departure Airport
DM = Time Stamp
DS = Destination Airport
ECAM = Electronic Centralized Aircraft Monitoring
EFCS = Electronic Flight Control System
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
FWC = Flight Warning Computer
IR = Inertial Reference
MMR = Multi-Mode Receiver
WN = Warning Number, followed by the Date-Time Group
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

2998.0 kHz H07 HFDL Shannon Air, Ireland, + aircraft B-2090 + B-6131 + SE-SMO + ZA-MMK + 50007B + 70031B + flight SS0970
Cruise data ZBAA - UUEE ...
POSREP = POS, WP, ATO, FL, next+1 WP, ETO, next+2 WP,
ETO, temperature, wind, FOB or SOG, time stamp, date, HEX serial
DC = Time Stamp
PDU = Pilot Display Unit
REQPWI = Predicted Wind Request for FL 390 340 300
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 UWT Taganrog Radio, Russian Federation
Warnings still in force - received 280220Z DEC 2023

490.0 kHz IGS Piombino Radio, Italy

490.0 kHz TAH Istanbul Radio, Turkey

17928.0 kHz H17 HFDL Telde Air, Canary Islands, + aircraft C-FJCS + CN-MAX + N702NK + N864FD + N967AV + 5Y-KYE + flight UAE51P
AGM = Miscellaneous Air/Ground Message
M1PWI = Meteorological Data - Predicted Wind for FL 340
REQPWI = Predicted Wind Request for FL 380 360 340 320
• Air and ground end systems include
(1) Datalink Application Service Element = CPDLC
(2) Aeronautical Telecommunication Network upper layers
(3) TP4 = Transport Protocol Class 4
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

12711.0 kHz PWZ Brazilian Navy Rio de Janeiro, Brazil

13920.0 kHz VMC Charleville Meteo QLD, Australia

13920.0 kHz VMC Charleville Meteo QLD, Australia

11387.0 kHz H04 HFDL Riverhead Air NY, United States of America, + flight AMX026

518.0 kHz Veraval Radio, India
IMD = India Meteorological Department

490.0 kHz EAC Tarifa Radio, Spain

8677.0 kHz CBV Valparaiso Radio, Chile

518.0 kHz NMC United States Coast Guard San Francisco CA, United States of America
BNM = Broadcast Notice to Mariners
LB = Lighted Buoy
LBB = Lighted Bell Buoy
LLNR = Light List Number
PZZ = AK CA OR WA

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

6535.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft B-5945 + G-DHLJ + HL7626 + PK-BGO + VN-A862 + 9V-SMQ + flight CES229
CFB = Centralized Fault Book
FCA = Facilities Contact Advisory
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
PES = Passenger Entertainment System
SR = Seat Row
• Engine Cruise Report HECA - ZUTF ...
= 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

8416.5 kHz L2C Argentinian Coast Guard Buenos Aires, Argentina

518.0 kHz XSI Sanya Radio, China

15025.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft CN-MAY + CN-ROT + CS-TKQ + JY-AYU + N613UP + TC-MCM + flight CAL075
AGM = Miscellaneous Air/Ground Message
CDB = Commandant Du Bord
CCO = Operations Control Centre
CFD = Centralized Fault Display
CTOT = Calculated Take-Off Time (used for slot allocation)
ECS = Environmental Control System
• Air and ground end systems include
(1) Datalink Application Service Element = CPDLC
(2) Aeronautical Telecommunication Network upper layers
(3) TP4 = Transport Protocol Class 4
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-EVD + EI-KGI + ES-SAF + F-HTYH + N613UP + N786AV + N847FD + RA73108 + RA73231 + RA73302 + flight KNE666
Perfect OOOI ...
CFD = Centralized Fault Display
DFB = Digital Flight Book
DFD = Digital Flight Data
FCNT = (DAR) Frame Counter
FSM = Flight System Message
ISFC = Indicated Specific Fuel Consumption
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAK = Facilities Acknowledgement Message
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response CPDLC
FCA = Facilities Contact Advisory
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

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 VBA Canadian Coast Guard Pass Lake ONT, Canada

518.0 kHz VON Canadian Coast Guard Robin Hood Bay, NFLD, Canada
IF = Ice Free
OW = Open Water

21997.0 kHz H13 HFDL Santa Cruz Air, Bolivia, + aircraft A6-AEC + A7-APF + N284AV + N330UP + N785AV + PR-YYH + ZS-SXM + 9V-SHB + flight TS0349
Increasing solar activity - and the ionosphere going totally crazy:
ATIS uplink for a ZBAA - WSSS regional hop ... via Santa Cruz!
Increasing solar activity - and the ionosphere going totally crazy:
ATIS uplink for a OEJN - OMAA local hop ... via Santa Cruz!
AMDAR = Aircraft Meteorological Data Relay SBGR - FAOR
CFB = Centralized Fault Book
DA = Departure Airport
DFD = Digital Flight Data
DM = Time Stamp
DS = Destination Airport
EIU = Engine Interface Unit
FADEC = Full Authority Digital Engine Control
FR = Fault Report, followed by the Date-Time Group
NAI = Nacelle Anti-Ice
REQPWI = Predicted Wind Request for FL 370
TI2 = Terminal Information Request
VSPT = Variable-Speed Power Turbine
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 CPDLC
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

21997.0 kHz H13 HFDL Santa Cruz Air, Bolivia, + aircraft A6-AEC + EI-EJG + HC-CTX + PR-TYK + PR-TYM + PR-TYU + PR-YYH + ZS-SXM + flight AZU447
AFS = Auto Flight System
CFB = Centralized Fault Book
DA = Departure Airport
DM = Time Stamp
DS = Destination Airport
DT = Destination, followed by the runway number
ELAC = Elevator Aileron Computer
FN = Flight Number
FR = Fault Report, followed by the Date-Time Group
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
• Engine Cruise Report FAOR - 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 ...
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 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 SVL Limnos Radio, Greece

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

486.0 kHz Fuzhou Radio, China
Chinese teleprinter code after Latin alphabet header
Scheduled and received correctly at 1620
however using slot letter O (as on 518 kHz) instead of C ...

12579.0 kHz L2C Argentinian Coast Guard Buenos Aires, Argentina

518.0 kHz Bjuroklubb Radio, Sweden

16806.5 kHz L2C Argentinian Coast Guard Buenos Aires, Argentina

5655.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft A6-ATD + A6-BLK + HS-XTH + 9V-SGF + 9V-SMC + flight CCA980
CFB = Centralized Fault Book
CIDS = Cabin Intercommunication Data System
FCMC = Fuel Control and Monitoring Computer
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
OCCS = Operations Control Centre Singapore
PSU = Passenger Service Unit
REQPWI = Predicted Wind Request for FL 380 360 340 320
TI2 = Terminal Information Request
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

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 VFF Canadian Coast Guard Iqaluit NUN, Canada

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

490.0 kHz XVR Vung Tau Radio, Viet Nam
Warnings still in force - received 260330Z NOV 2023

518.0 kHz NMN United States Coast Guard Norfolk VA, United States of America
UMIB = Urgent Marine Information Broadcast

10063.0 kHz H11 HFDL Panama City Air, Panama, + aircraft CC-BGN + EI-MAA + flight AVA087
ACDM = Airport Collaborative Decision Making
DFB = Digital Flight Book
DT = Destination, followed by the runway number
FN = Flight Number
TI2 = Terminal Information Request
TS = Time Stamp
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAK = Facilities Acknowledgement Message
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response CPDLC
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

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 Muttam Point Radio, India
IMD = India Meteorological Department

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

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

518.0 kHz EAR La Coruna Radio, Spain

13276.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft A6-XWA enroute
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

CDP = Computer Diagnostics Program
EDP = Engine Display Panel
FWS = Flight Warning System
HPP = High Pressure Pump
MIAM = Media Independent Aircraft Message
PDU = Pilot Display Unit

8677.0 kHz CBV Valparaiso Radio, Chile

6450.0 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 Grindavik Radio, Iceland

518.0 kHz SVK Kerkyra Radio, Greece

518.0 kHz 5BA Nicosia Radio, Cyprus

518.0 kHz Antalya Radio, Turkey

7795.0 kHz JMH2 Tokyo Meteo, Japan

518.0 kHz NMW United States Coast Guard Astoria OR, United States of America
BNM = Broadcast Notice to Mariners
LLNR = Light List Number

12586.0 kHz UDK Murmansk Radio, Russian Federation
Warnings still in force - received 231500Z OCT 2023

8416.5 kHz NMC United States Coast Guard San Francisco CA, United States of America
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

8431.0 kHz XSQ Guangzhou Radio, China
N/W = Nautical Warning
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 ...

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

518.0 kHz UHY Murmansk Radio, Russian Federation

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 L2G Argentinian Coast Guard Buenos Aires, Argentina

2610.2 kHz FUO French Navy Toulon, France

8416.5 kHz VFF Canadian Coast Guard Iqaluit NUN, Canada

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

8412.5 kHz XSQ Guangzhou Radio, China
CMA = China Meteorological Administration
MSA = Maritime Safety Administration

4209.5 kHz XVN Nha Trang Radio, Viet Nam

12786.0 kHz NMC United States Coast Guard San Francisco CA, United States of America
NHC = National Hurricane Center

10081.0 kHz H07 HFDL Shannon Air, Ireland, + aircraft B-1081 enroute ZBAA - LIMC + flight ASL69B
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

ACMS = Aircraft Condition Monitoring System
MIAM = Media Independent Aircraft Message
PDU = Pilot Display Unit

518.0 kHz L2T Argentinian Coast Guard Mar del Plata, Argentina

518.0 kHz Vengurla Point Radio, India

11312.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + flight APJ584 + DAL296

19640.8 kHz Digital data station

16906.8 kHz FUV French Navy Jibuti, Djibouti
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

6535.0 kHz H05 HFDL Auckland Air, New Zealand, + flight ANZ174 + CPA111

518.0 kHz PBK Netherlands Coast Guard Ijmuiden, Netherlands
TSS = Traffic Separation Scheme

8696.0 kHz CBM Magallanes Radio, Chile

11090.0 kHz KVM70 Honolulu Meteo, Hawaii
ITCZ = Inter-Tropical Convergence Zone

490.0 kHz Santa Marta Radio, Colombia

8481.8 kHz 5253 5570 Digital data stations

518.0 kHz Buenaventura Radio, Colombia

518.0 kHz CBM Magallanes Radio, Chile

518.0 kHz L3B Argentinian Coast Guard Comodoro Rivadavia, Argentina
L4P = Argentinian Coast Guard Caleta Cordoba

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

8894.0 kHz H11 HFDL Panama City Air, Panama, + flight AV0235 + M73926

8834.0 kHz H08 HFDL Johannesburg Air, South Africa (Republic of), + aircraft A6-ATF + ET-AVC + G-VFAN
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

MIAM = Media Independent Aircraft Message
PDU = Pilot Display Unit
RTR = Ready To Receive

8834.0 kHz H08 HFDL Johannesburg Air, South Africa (Republic of), + aircraft D-AXGF + ES-SAB + 5Y-CYE + flight KQA271
CFB = Centralized Fault Book
DT = Destination, followed by the runway number
FCN = FANS Completion Notification (FANS = Future Air Navigation System)
FN = Flight Number
LRU = Line Replaceable Unit
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

13321.0 kHz H08 HFDL Johannesburg Air, South Africa (Republic of), + flight KNE509 + KQA271

518.0 kHz UIB Magadan Radio FE, Russian Federation

6349.8 kHz FUE French Navy Brest, France
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

518.0 kHz UCV Okhotsk Radio FE, Russian Federation

8439.0 kHz PBB Dutch Navy Den Helder, Netherlands

4298.0 kHz NOJ United States Coast Guard Kodiak, Alaska

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 3VL Kelibia Radio, Tunisia
NTM = Notice to Mariners

13321.0 kHz H08 HFDL Johannesburg Air, South Africa (Republic of), + aircraft F-HTYR + JY-AYV + 9V-SGA + 9XR-WG + flight KNE220
DT = Destination, followed by the runway number
FN = Flight Number
REQPRG = Request Flight Progress Report
• Engine Cruise Report HECA - OJAI ...
= 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 screenshot, however, the text is not table-formatted;
anyway, standard row identifiers such as CC C0 C1 CE ... can be easily identified after the slash ...
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 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

8106.9 kHz SWA28 Athens Meteo, Greece

3881.0 kHz FAV22 French Army Mont-Valerien, France

6220.0 kHz IDN Italian Navy Napoli, Italy
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

490.0 kHz TFX Siglufjördur Radio, Iceland
Saudanes is the name of the lighthouse in that fjord ...
Landhelgisgaeslan = Coast Guard
Siglingavidvorun = Navigational Warning

518.0 kHz XYM Myeik Radio, Myanmar
ZWP = Zawtika Well Pipeline

11090.0 kHz KVM70 Honolulu Meteo, Hawaii

21949.0 kHz H08 HFDL Johannesburg Air, South Africa (Republic of), + aircraft A6-AEI + SU-GEF + 4R-EXS + flight KNE220 + RAM208
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
REQPWI = Predicted Wind Request for FL 340 320 300 280
RESPWI/AC = FMS downlink acceptance and insertion of PWI = Predicted Wind uplink data
RESPWI/AK = FMS downlink acknowledgement of PWI = Predicted Wind uplink data
TI2 = Terminal Information Request
WN = Warning Number, followed by the Date-Time Group

5156.8 kHz TBB Turkish Navy Ankara, Turkey
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

518.0 kHz SUH Alexandria Radio, Egypt
BA = British Admiralty
EAFMS = Egyptian Authority for Maritime Safety
This is the former PLA (Ports and Lighthouses Administration) ...
IEOC = International Egyptian Oil Company
SAIPEM = Societa Anonima Italiana Perforazioni e Montaggi (Italy)

2628.0 kHz VMC Charleville Meteo QLD, Australia
MSLP = Mean Sea Level Pressure

Strong solar activity allows excellent HF reception on 22 MHz and higher
This sonagram of 28 December 2022 shows perfect HFDL signals
on 21931 kHz (Muan Air, South Korea)
21934 kHz (San Francisco Air CA, United States of America)
and 21937 kHz (Hoolehua Air, Molokai, Hawaii)

16953.3 kHz 6WW French Navy Dakar, Senegal

10093.0 kHz H09 HFDL Barrow Air, Alaska, + aircraft A6-EVC + RA73673
ADR = Air Data Reference
CFB = Centralized Fault Book
WN = Warning Number, followed by the Date-Time Group
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, + flight AVA249 + IBE683

6030.0 kHz China National Radio DRM transmission
decoded with the Kiwi-SDR extension feature

8416.5 kHz VFF Canadian Coast Guard Iqaluit NUN, Canada

12386.0 kHz Digital data station, Japan
32 channels + continuous pilot tone on the left ...

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 202^3 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

More than 26,000 (twenty six thousand!) fascinating screenshots are available on our unique Digital Data Decoder Screenshots USB Stick!