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!


Open-Source Intelligence at its best - here it's Open Signals Intelligence ...
Since the start of Putin's war against Ukraine
on 24 FEB 2022, most of those hundreds of aircraft
operated by airlines - such as Aeroflot - in the Russian Federation
and leased from e.g. "offshore" companies elsewhere
and registered in e.g. Bermuda as VP-ABC or VQ-XYZ for tax avoidance
have been "re-registered" (read: seized) under the new callsign series RA73...
These callsigns have never been monitored before!
RA73678 is yet another "re-registered" (read: seized) Airbus A319-111 aircraft
leased from GECAS = General Electric Capital Aviation Services in Stamford CT, USA
and originally registered as VP-BWK in Bermuda ...
Aurora Airlines (based at UHSS = Yuzhno-Sakhalinsk) flight HZ5653:
enroute UIII - UHHH fault warning message ...
WN = Warning Number, followed by the Date-Time Group
Apart from perfectly decoding ADS-C and CPDLC messages such as Basic Reports,
the superb go2MONITOR's Result Viewer displays meta-data
such as sender and recipient identifications extracted from decoder result files
here selected from the 1 JUL to 12 AUG 2023 time range

4209.5 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!!!

4209.5 kHz XVN Nha Trang Radio, Viet Nam

4209.5 kHz XVN Nha Trang Radio, Viet Nam

8927.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft B-2096 + EI-MYY + HL7746 + JA815A + N852GT + flight EI01LW
Riding on the North Pacific Jet Stream over the Bering Sea
at 541 knots = 1001+ kilometres per hour ...
AIMS = Airplane Information Management System
CFB = Centralized Fault Book
CFD = Centralized Fault Data
DCMF = Data Communication Management Function
DB = Data Base
EOR = End of Report
HNDMAT = Haneda Meteorological Advice Team
RSCF = Recorder Setup Configuration File
WN = Warning Number, followed by the Date-Time Group
The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus the Figure of Merit code or 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 XVS Ho Chi Minh City Radio, Viet Nam

518.0 kHz 9MG Georgetown Radio, Pinang Island, Malaysia

16806.5 kHz NMO United States Coast Guard Honolulu, Hawaii


TS = Tropical Storm Hilary ...

16806.5 kHz L2C Argentinian Coast Guard Buenos Aires, Argentina
Not the fgrst tgme that thegr message system transmgts letter G instead of I ;-))

10060.0 kHz H10 HFDL Muan Air, South Korea, + aircraft B-20CJ + B-325J + B-2291 + B-6009 + B-8019 + HL7793 + 9V-SCH + flight CCA439
AGM = Miscellaneous Air/Ground Message
PD = Profile Descent
TI2 = Terminal Information Request
• 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

10060.0 kHz H10 HFDL Muan Air, South Korea, + aircraft B-LNW + B-LXG + B-32CX + B-325J + B-18916 + HS-XTH + 9V-SJG + flight CES539
Code figures for ZLXY runways braking action - see e.g. here
AGM = Miscellaneous Air/Ground Message
CFB = Centralized Fault Book
RWYCC = Runway Condition Code
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

16806.5 kHz NRV United States Coast Guard Apra Harbour, Guam
ITCZ = Inter-Tropical Convergence Zone
ZAN since 2016! Reactivated?

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

10063.0 kHz H11 HFDL Panama City Air, Panama, + aircraft CC-BGN + EI-MAA + flight TS0012
AGM = Miscellaneous Air/Ground Message

5195.0 kHz DRA5 Kiel, Germany

8948.0 kHz H17 HFDL Telde Air, Canary Islands, + aircraft CC-BBI + CN-RGG + ES-SAG + N877FD + flight UAL900
AGM = Miscellaneous Air/Ground Message
CCO = Operations Control Centre
SCV = Surge Control Valve
TI2 = Terminal Information Request

518.0 kHz NMQ United States Coast Guard Long Beach CA, United States of America
BNM = Broadcast Notice to Mariners
LA = Los Angeles
LB = Long Beach
SD = San Diego
SF = San Francisco

10084.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft B-308Y + B-6097 + N344KD + N873FD + RPC9934 + flight OZ0754
MDPWI = Meteorological Data - Predicted Wind for FL 360
REQPWI = Predicted Wind Request for FL 360 340 320
TS = Time Stamp
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

10081.0 kHz H07 HFDL Shannon Air, Ireland, + aircraft B-1081 + 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 SUK Quseir Radio, Egypt
BA = British Admiralty
EAFMS = Egyptian Authority for Maritime Safety
This is the former PLA (Ports and Lighthouses Administration) ...
GUPCO = Gulf of Suez Petroleum Company

8912.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft A6-BLK + EI-GEY + N281UP + N574DZ + N625FE + flight FX1423
CFB = Centralized Fault Book
EFCS = Electronic Flight Control System
MCC = Maintenance Control Centre
REQPER = Request Performance Report
TOCG = Take Off Centre of Gravity
WN = Warning Number, followed by the Date-Time Group
ZFCG = Zero Fuel Centre of Gravity
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
• 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

8912.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft C-GOIE + N120FE + N516DN + N528FE + N588FE + N625FE + flight FDX141
POSREP = POS, WP, ATO, FL, next+1 WP, ETO, next+2 WP,
ETO, temperature, wind, FOB or SOG, time stamp, date, HEX serial
DA = Departure Airport
CFD = Centralized Fault Data
DFD = Digital Flight Data
DS = Destination Airport
EVS = Enhanced Vision System
HUD = Heads Up Display
The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus the Figure of Merit code or 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 GCC Cullercoats Radio, United Kingdom

518.0 kHz JNX Kushiro Radio, Japan

17919.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft C-FVLU + N615UP + 9V-SGG + flight UAL261
CFD = Centralized Fault Display
ECS = Environmental Control 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 L2G Argentinian Coast Guard Buenos Aires, Argentina

518.0 kHz L2T Argentinian Coast Guard Mar del Plata, Argentina

13324.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft B-326G + N887FD + XA-VSG + 9V-SMH + flight SAS931
FF = Fuel Flow (for engines 1 + 2)
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

5583.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft A6-EVO + HL8502 + 9V-SGA + 9V-SGC + 9V-SMD + flight UAE500
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 Basic or Periodic Report gives position - trajectory intent - speed vector data
plus the Figure of Merit code or 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 NMC United States Coast Guard San Francisco CA, United States of America
BNM = Broadcast Notice to Mariners
LLNR = Light List Number
LWB = Lighted Whistle Buoy
SF = San Francisco

518.0 kHz NMO United States Coast Guard Honolulu, Hawaii
BNM = Broadcast Notice to Mariners
PMRF = Pacific Missile Range Facility

9165.0 kHz HLL Soul Meteo, South Korea

9165.0 kHz HLL Soul Meteo, South Korea

9165.0 kHz HLL Soul Meteo, South Korea

486.0 kHz XSG Shanghai Radio, China
Chinese teleprinter code after Latin alphabet header
Presumably local time used here since received (beyond schedule ...) at 1650 UTC ...
According to this NAVAREA 11 document, XSG uses indeed
transmitter identification character Q on both 518 and 486 kHz

11184.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft A6-EVO + B-7836 + C-FIUW + C-GOIM + G-VTOM + N864FD + N964AM + flight TSC572
POSREP = POS, WP, ATO, FL, next+1 WP, ETO, next+2 WP,
ETO, temperature, wind, FOB or SOG, time stamp, date, HEX serial
FSM = Flight System Message
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 the Figure of Merit code or 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

11184.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft A6-EUV + CN-NMJ + CN-ROP + G-VTOM + N964AM + TC-MCM + 9V-SGC + flight ACA51
ADIRU = Air Data Inertial Reference Unit
CFB = Centralized Fault Book
DATIS = Digital Airport Terminal Information System
DFD = Digital Flight Data
DT = Destination, followed by the runway number
FLR = Failure
FN = Flight Number
FR = Fault Report, followed by the Date-Time Group
FWS = Flight Warning System
TI2 = Terminal Information Request
WXR = Weather Radar
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
PRG = Flight Progress Report sent shortly
(i.e. 1 hour - 10 minutes) before arrival,
typically including destination airport followed by
estimated runway for landing, estimated FOB, ETA, and FN

The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles

CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here

Codes of ACARS Message Labels can be found here

8416.5 kHz L2C Argentinian Coast Guard Buenos Aires, Argentina

17919.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft B-18910 + HL7626 + N487AS + N599FE + N886FD + RPC8780 + 9V-SGA + 9V-SGC + flight ANA968
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
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
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 Vengurla Point Radio, India

17958.0 kHz H10 HFDL Muan Air, South Korea, + aircraft B-LRE + B-1858 + B-5922 + B-8119 + B-8378 + B-8397 + P4-IFD + flight CHH730
PDC = Pre-Departure Clearance
TI2 = Terminal Information Request

518.0 kHz ICH Italian Coast Guard La Maddalena Island, Italy

6535.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft B-LXK + B-209E + B-1111 + B-6538 + EC-NBN + N28987 + RPC8780 + flight CAL054
EC-NBN is a daily shuttle service NZAA - YPPH - NZAA
by Wamos Air on wet lease for Air New Zealand ...
Flight parameters KSFO - YBBN ...
Flight parameters and enroute weather ZSNJ - YSSY ...
AFS = Auto Flight System
CFB = Centralized Fault Book
CIDS = Cabin Intercommunication Data System
DFB = Digital Flight Book
DMC = Display Management Computer
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
FWS = Flight Warning System
GPWC = Ground Proximity Warning Computer
MMR = Multi-Mode Receiver
ND = Navigation Display
PES = Passenger Entertainment System
REQPWI = Predicted Wind Request for FL 410 390 370 330
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

10084.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft A6-EEF + EC-NBN + SU-GEI + flight UAE3HJ
Increasing solar activity - and the ionosphere going totally crazy:
POSREP downlink from a HECA - VABB flight ... via Auckland!
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 YPPH - NZAA ...
= collection of data over a period of time
in which the aircraft met the appropriate stability criteria
If no stability is detected, then the report
ends with NO STABLE FRAME CONDITION
• Aircraft in-flight performance parameters such as OIT = Oil Temperature are explained e.g. here
• The yellow table below shows a typical parameters list ...
The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus the Figure of Merit code or 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

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

13270.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft A4O-DF + A6-ATD + B-8890 + JA878A + VN-A508 + 9V-SCE + 9V-SCK + 9V-SGC + flight ETH628
CFD = Centralized Fault Display
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

• 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

13270.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft A4O-DF + VN-A508 + 9V-SCN + 9V-SHL + 9V-SHS + 9V-SMS + flight CES618
DT = Destination, followed by the runway number
FN = Flight Number
REQPRG = Request Flight Progress Report
The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus the Figure of Merit code or 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 NRV United States Coast Guard Apra Harbour, Guam
BNM = Broadcast Notice to Mariners
GU = Guam
LLNR = Light List Number
LWB = Lighted Whistle Buoy
ZAN since 2016! Reactivated?

11312.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft N842FD + N893FD + OE-LFD + RPC9930 + 9V-SKW + flight 2P2923
Code figures for ZUUU runways braking action - see e.g. here
MDPWI = Meteorological Data - Predicted Wind for FL 310
TI2 = Terminal Information Request
• 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

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

518.0 kHz JNR Moji Radio, Japan

518.0 kHz UFO Kholmsk Radio FE, Russian Federation

518.0 kHz UFL Vladivostok Radio SE, Russian Federation
Zaliv Petra Velikogo = Peter the Great Gulf

8927.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft N633UP + N880FD + N958AK + flight SIA246
Reed back!!! Again ...
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 JGC Yokohama Radio, Japan

8927.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft N523FE + N588FE + N944AV + N958AK + XA-VSG + 9V-SGC + flight SAA357
DT = Destination, followed by the runway number
CFD = Centralized Fault Display
DFD = Digital Flight Data
EHS = Enhanced Surveillance
ELS = Elementary Surveillance
FMS = Flight Management System
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

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 XSG Shanghai Radio, China
MSA = Maritime Safety Administration

8927.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft N585FE + N958AK + flight AAR202
Flight parameters and enroute weather PHNL - KLAX ...
DFD = Digital Flight Data
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 Basic or Periodic Report gives position - trajectory intent - speed vector data
plus the Figure of Merit code or 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

13988.5 kHz JMH4 Tokyo Meteo, Japan
STS = Severe Tropical Storm Lan ...

8912.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft C-GUBT + N847FD + N850FD + N889FD + flight TAI366
Code figures for KIND runways braking action - see e.g. here
AGM = Miscellaneous Air/Ground Message
GOCC = Global Operations Control Center
PDU = Pilot Display Unit
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 EQI Abbas Radio, Iran

8942.0 kHz H07 HFDL Shannon Air, Ireland, + aircraft RA73226 + RA73230 + RA73294 + RA73307 + YR-WOW + flight AFR226
The INRANGE message announces the aircraft being within VHF range of the DS
ADIRU = Air Data Inertial Reference Unit
AIDS = Aircraft Integrated Data System
CFB = Centralized Fault Book
CFDS = Centralized Fault Display System
CVDR = Cockpit Voice and Data Recorder
DA = Departure Airport
DAR = Data Access Recorder
DM = Time Stamp
DS = Destination Airport
ECAM = Electronic Centralized Aircraft Monitoring
EIU = Engine Interface Unit
FADEC = Full Authority Digital Engine Control
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
FWC = Flight Warning Computer
GPSSU = Global Positioning System Sensor Unit
MMR = Multi-Mode Receiver
SDU = Satellite Data Unit
TCAS = Traffic Alert and Collision Avoidance System
TPIS = Tire Pressure Indicator System
WN = Warning Number, followed by the Date-Time Group

8416.5 kHz NMO United States Coast Guard Honolulu, Hawaii

8416.5 kHz L2C Argentinian Coast Guard Buenos Aires, Argentina

8425.5 kHz XSG Shanghai Radio, China

4209.5 kHz XVG Hai Phong Radio, Viet Nam

518.0 kHz NMW United States Coast Guard Astoria OR, United States of America
NAWCWD = Naval Air Warfare Center Aircraft Division

4209.5 kHz XVG Hai Phong Radio, Viet Nam

8948.0 kHz H17 HFDL Telde Air, Canary Islands, + aircraft A7-ALY + CN-RGS + CN-ROY + N513DZ + N574FE + PR-YYL + flight UPS327
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
ATSU = Air Traffic Service Unit
CCO = Operations Control Centre
CFB = Centralized Fault Book
DCDU = Datalink and Control Display Unit
DFD = Digital Flight Data
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
VDR = VHF Data Radio
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
FCO ADS = Facilities Contact ADS-C
FCO ATC = Facilities Contact CPDLC
FMH = Facilities Message Header = Flight Number
FPO = Facilities Current Position
FRP = Facilities Response
• 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

8948.0 kHz H17 HFDL Telde Air, Canary Islands, + aircraft A7-ALY + CN-ROL + N513DZ + PR-YYL + flight UAL906
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
The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles

The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus the Figure of Merit code or 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

21997.0 kHz H13 HFDL Santa Cruz Air, Bolivia, + aircraft G-VNYC + HP1534 + LV-KAO + PR-TYM + flight TAM336
DT = Destination, followed by the runway number
FN = Flight Number
RESPWI/AC = FMS downlink acceptance and insertion of PWI = Predicted Wind uplink data
RESPWI/AK = FMS downlink acknowledgement of PWI = Predicted Wind uplink data
RESREQ/AK = FMS downlink acknowledgement of a REQFPN uplink
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

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

12382.0 kHz XSG Shanghai Radio, China
CMA = China Meteorological Administration

12382.0 kHz XSG Shanghai Radio, China
CMA = China Meteorological Administration

22376.0 kHz NRV United States Coast Guard Apra Harbour, Guam

8912.0 kHz H04 HFDL Riverhead Air NY, United States of America, + flight AS0828 + THY76Y

7535.0 kHz VMW Wiluna Meteo WA, Australia

13276.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft C-GHQY + JA13KZ + N573DZ + N642FE + N963AV + 9V-SGC + flight IBE665
DFD = Digital Flight Data
DT = Destination, followed by the runway number
FMC = Flight Management Computer
FMS = Flight Management System
FN = Flight Number
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
FCO ADS = Facilities Contact ADS-C
FCO ATC = Facilities Contact CPDLC
FMH = Facilities Message Header = Flight Number
FPO = Facilities Current Position
FRP = Facilities Response
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 Veraval Radio, India

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

21937.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft B-6012 + B-6636 + F-UJCS + N851FD + N876FD + flight CES517
PD = Profile Descent
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
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

21937.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft HL7626 + HL8082 + N605UP + VN-A617 + VN-A619 + flight KAL036
• Engine Cruise Report VVNB - RJGG ...
= 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

12585.5 kHz KPH San Francisco Radio CA, United States of America

10063.0 kHz H11 HFDL Panama City Air, Panama, + aircraft CN-RGU + EC-NNY + ET-AUR + N642FE + N703NK + PR-TYR + flight LAN535
DFD = Digital Flight Data
• Engine Cruise Report KLGA - KFLL ...
= 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 ...
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

8658.0 kHz JFX Kagoshima Fisheries Radio, Japan
Maritime safety information for NAVAREAs 10/11 ...
The date reads 5 8 5 = 2023 August 5
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 N292NV + N571DZ + N585FE + N706NK + flight LP2690
Code figures for KMEM runways braking action - see e.g. here
CFD = Centralized Fault Display
TI2 = Terminal Information Request

17928.0 kHz H17 HFDL Telde Air, Canary Islands, + aircraft A6-EUD + C-FGDT + C-FIVQ + F-HTYA + G-DHLK + G-NEOS + flight UZB271
ADC = Air Defence Clearance
CFB = Centralized Fault Book
EPR = ETOPS Progress Report
WN = Warning Number, followed by the Date-Time Group
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FMH = Facilities Message Header = Flight Number
FRP = Facilities Response
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

11348.0 kHz H17 HFDL Telde Air, Canary Islands, + aircraft EC-NHM + F-HTYK + G-VUFO + HZ-NS32 + HZ-NS36 + OH-LWE + YR-WIN + flight UAL112
Code figures for LFPG runways braking action - see e.g. here
AA = Arrival Airport
CFB = Centralized Fault Book
DA = Departure Airport
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
FPN = Flight Plan Report downlink
REQPWI = Predicted Wind Request for FL 410 390 360
RESPWI/AC = FMS downlink acceptance and insertion of PWI = Predicted Wind uplink data
RESPWI/AK = FMS downlink acknowledgement of PWI = Predicted Wind uplink data
RESREQ/AK = FMS downlink acknowledgement of a REQFPN uplink
RSCD = Runway Surface Condition
TI2 = Terminal Information Request
WN = Warning Number, followed by the Date-Time Group

490.0 kHz GPK Portpatrick Radio, United Kingdom

19640.8 kHz Digital data station

15778.0 kHz Digital data station

8305.8 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

11312.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft B-2094 + B-8573 + B-58502 + N419MC + 9V-SJE + flight SJX002
CDP = Computer Diagnostics Program
CFD = Centralized Fault Display
DFD = Digital Flight Data
ECS = Environmental Control System
EDP = Engine Display Panel
EDTO = Extended Diversion Time Operations
FWS = Flight Warning System
The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus the Figure of Merit code or 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

7795.0 kHz JMH2 Tokyo Meteo, Japan

518.0 kHz VAE Canadian Coast Guard Tofino BC, Canada
Amphitrite Point Lighthouse is 40 kilometres south of Tofino ...

8927.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-2413 + B-6006 + RA73217 + VN-A590 + 9V-SHA + 9V-SJC + flight CPA922
Increasing solar activity - and the ionosphere going totally crazy:
POSREP downlink from a ULLI - UNKL domestic flight ... via Guam!
PD = Profile Descent
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

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

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

6450.0 kHz PWZ Brazilian Navy Rio de Janeiro, Brazil
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

10060.0 kHz H10 HFDL Muan Air, South Korea, + aircraft B-2046 + B-6540 + B-6825 + HL7640 + JA882A + N452PA + 9V-SGD + flight CSC892
Data for FL 410 - 190 ...
AGM = Miscellaneous Air/Ground Message
CFD = Centralized Fault Display
ECS = Environmental Control System
ERCT = Estimated Reaching Cruise Time
SR = Sunrise
SS = Sunset
TI2 = Terminal Information Request
• 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

4210.5 (not 4209.5!) 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 1340 UTC ...

12579.0 kHz UAT Moscow Radio, Russian Federation
FSUE = Federal State Unitary Enterprise

4583.0 kHz DDK2 Hamburg Meteo, Germany

4583.0 kHz DDK2 Hamburg Meteo, Germany

10060.0 kHz H10 HFDL Muan Air, South Korea, + aircraft A4O-DC + B-308A + B-325J + B-1292 + B-8549 + HL8258 + N101FE + N107FE + 9H-VDC + flight CES551
DEST BURN + ALTN + RESERVE + HOLD = MIN RQD + RPF + OTHER = TKOF + TAXI = TTL FOB ...
AGM = Miscellaneous Air/Ground Message
CFB = Centralized Fault Book
DFD = Digital Flight Data
EEP = ETOPS Entry Point
ETP = Equitime Point
FCMC = Fuel Control and Monitoring Computer
FOD = Fuel Over Destination
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
GOCC = Global Operations Control Center
MFWF = Minimum Flight Weight Fuel
RPF = Reliability Protection Fuel
VSC = Vacuum System Controller

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

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

518.0 kHz JNB Naha Radio, Okinawa Island, Japan

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

8431.0 kHz TAH Istanbul Radio, Turkey

12147.8 kHz Digital data station

518.0 kHz PKX Jakarta Radio, Indonesia
TC = Tropical Cyclone

8977.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft OH-LWE + flight KZR919
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

8977.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft B-32AL + B-32AS + B-32DM + OH-LWE
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

8977.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft C-FPQB + C-GTSZ + G-POWK + HZ-NS29 + N17015 + flight SU1611
AGM = Miscellaneous Air/Ground Message
CFB = Centralized Fault Book
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
PSCU = Proximity Switch Control Unit
WN = Warning Number, followed by the Date-Time Group
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

4209.5 kHz XVN Nha Trang Radio, Viet Nam

15025.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft B-5942 + B-5977 + C-GOIW + CN-RGS + EI-KGG + LY-CIN + flight AFR352
AGM = Miscellaneous Air/Ground Message
CCO = Operations Control Centre
CFB = Centralized Fault Book
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
MMR = Multi-Mode Receiver
WN = Warning Number, followed by the Date-Time Group
• Engine Cruise Report LIRF - ZSHC ...
= 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 ...

15025.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft B-2031 + JY-AYU + N840FD + SU-GDY + flight 8U0975
PSH = Pushback Time
TI2 = Terminal Information Request
• DELAY is a critical procedure, designed to prevent pilots
from acting on any old CPDLC messages
that might have been delayed in the network
The most serious of such cases would be
the pilot executing a clearance that was no longer valid
CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here

Codes of ACARS Message Labels can be found here

11312.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft A6-EVN + C-GOIO + JA823P + N344KD + 9V-SHL + flight UAL83
AGM = Miscellaneous Air/Ground Message
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

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

518.0 kHz EAR La Coruna Radio, Spain

17919.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft B-8226 + CC-BGD + F-HRBC + RPC9934 + flight AMX644
• 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

518.0 kHz GNI Niton Radio, United Kingdom

5583.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft B-20AA + JA15VA + N625UP + PK-GMO + RPC8780 + flight CAL054
Perfect OOOI ...
AGM = Miscellaneous Air/Ground Message
EEP = ETOPS Entry Point
ETP = Equitime Point
SOC = Service Operations Centre
• 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

4209.5 kHz XSQ Guangzhou Radio, China
SUPERTY = Super Typhoon Doksuri

13570.0 kHz HLL Soul Meteo, South Korea

8927.0 kHz H01 HFDL San Francisco Air CA, United States of America, + flight AS0898 + CAL006

8948.0 kHz H17 HFDL Telde Air, Canary Islands, + aircraft CN-ROU + N450PA + OE-LZW + flight MSR528
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

13270.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft B-2420 + B-18665 + F-HRBC + VN-A508 + VN-A619 + VN-A624 + flight UPS76
Perfect OOOI ...
POSREP = POS, WP, ATO, FL, next+1 WP, ETO, next+2 WP,
ETO, temperature, wind, FOB or SOG, time stamp, date, HEX serial
AFS = Auto Flight System
BMC = Bleed Monitoring Computer
CFB = Centralized Fault Book
DA = Departure Airport
DM = Time Stamp
DS = Destination Airport
FR = Fault Report, followed by the Date-Time Group
RA = Radio Altimeter
TI2 = Terminal Information Request
TPEOD = Taipei Operational Department
TPIS = Tire Pressure Indicator System
WN = Warning Number, followed by the Date-Time Group

4209.5 kHz XVG Hai Phong Radio, Viet Nam

10027.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft B-8601 + B-18905 + B-18906 + ET-AYB + HL8293 + N508DN + N611UP + N632UP + RPC9934 + flight AS1256
AGM = Miscellaneous Air/Ground Message
CDP = Computer Diagnostics Program
CDT = Control Display of Traffic
CIDS = Cabin Intercommunication Data System
DFD = Digital Flight Data
EDP = Engine Display Panel
FWS = Flight Warning System
MTC = Maintenance Technical Center
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 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

13342.0 kHz H10 HFDL Muan Air, South Korea, + aircraft HL7638 + flight CES665

13351.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft JA833A + flight MM0236
Data for FL 390 - 210 ...
ERCT = Estimated Reaching Cruise Time
HNDMAT = Haneda Meteorological Advice Team
SR = Sunrise
SS = Sunset

8948.0 kHz H17 HFDL Telde Air, Canary Islands, + aircraft C-GHQQ + C-GUBT + EI-EJL + LY-CIN + 9H-SMF + flight FDX38
CFB = Centralized Fault Book
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
VC = Ventilation Controller
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 Waypoint Change Event is triggered by a change
made to the Next, or the Next-plus-one waypoint
This change normally occurs due to normal waypoint sequencing by the FMS
The Next or Next-plus-one waypoint can be either an ATS waypoint or a pilot inserted waypoint

CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here

Codes of ACARS Message Labels can be found here

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

5583.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft C-FNOH + JA219A + JA936A + RPC9934 + flight UAE1CR
AWDSA = Automated Weather Data - Surface Analysis
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

8696.0 kHz CBM Magallanes Radio, Chile

10084.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft N632UP + flight ETD91N
The final part of the message is missing
BCTA = Below Control Area
A NOTAM decoder can be found e.g. here

518.0 kHz NMN United States Coast Guard Norfolk VA, United States of America

8942.0 kHz H07 HFDL Shannon Air, Ireland, + aircraft N26902 + flight VIR354
DT = Destination, followed by the runway number
REQPRG = Request Flight Progress Report
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
FRP = Facilities Response
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 the Figure of Merit code or 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 F-HRBC + N26902 + RA73217 + RA73230 + flight SN05EP
TI2 = Terminal Information Request
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FCA = Facilities Contact Advisory
FMH = Facilities Message Header = Flight Number
• Engine Cruise Report URMM - ULLI ...
= 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

21931.0 kHz H10 HFDL Muan Air, South Korea, + flight CES565 + CSZ999

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

10027.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft B-6973 + B-7836 + B-18903 + HL7754 + HL8293 + N610UP + N618FE + flight AS1417
AGM = Miscellaneous Air/Ground Message
CFD = Centralized Fault Display
TI2 = Terminal Information Request
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FCA = Facilities Contact Advisory
FMH = Facilities Message Header = Flight Number
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
The 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

8912.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft EC-NNY + LV-KHT + PR-TYQ + flight AAR211
AGM = Miscellaneous Air/Ground Message
AMDAR = Aircraft Meteorological Data Relay SAEZ - MMUN
CI = Consistency Index
DFB = Digital Flight Book
TOM = Take-Off Mass

5655.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft A4O-DE + B-30AF + B-30FM + 9V-SHF + 9V-SMK + 9V-SMS + 9V-SMT + flight UAE8PA
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
• 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

10063.0 kHz H11 HFDL Panama City Air, Panama, + aircraft CC-BDC + C-FSBV + N940AV + flight GTI060
REQPWI = Predicted Wind Request for FL 380 360 340
• 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 Basic or Periodic Report gives position - trajectory intent - speed vector data
plus the Figure of Merit code or 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 NOJ United States Coast Guard Kodiak, Alaska

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

8912.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft G-VLDY + N584FE + XA-VBW + flight DAL41
AA = Arrival Airport
DA = Departure Airport
FPN = Flight Plan Report downlink
FPR = Flight Plan Route
MEDA = Medical Assistance
REQPWI = Predicted Wind Request for FL 390 360
RESPWI/AC = FMS downlink acceptance and insertion of PWI = Predicted Wind uplink data
RESREQ/AK = FMS downlink acknowledgement of a REQFPN uplink
RMPSRV = Ramp Service Request
UMNR = Unaccompanied Minor

8912.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft EC-OAQ + HZ-NS54 + N501DN + N702NK + XA-VRX + flight IBE640
Increasing solar activity - and the ionosphere going totally crazy:
OPNORM downlink for a OEAB - OEJN local hop ... via New York!
DFB = Digital Flight Book
EGT = Exhaust Gas Temperature
TI2 = Terminal Information Request
• Engine Cruise Report LEMD - SKBO ...
= collection of data over a period of time
in which the aircraft met the appropriate stability criteria
If no stability is detected, then the report
ends with NO STABLE FRAME CONDITION
• Aircraft in-flight performance parameters such as OIT = Oil Temperature are explained e.g. here
• The yellow table below shows a typical parameters list ...

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

13270.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft B-304D + JA822P + N509DN + flight CES979
AGM = Miscellaneous Air/Ground Message
CI = Consistency Index
FMS = Flight Management System
PFL = Planned Flight Level
PFR = Planned Fuel Remaining
PLND = Planned Time
RDA = Route Data Assessment
RDC = Route Data Calculation
• 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

16907.5 kHz JFA Funabashi Fisheries Radio, Japan
NOAA satellite settings for JRC / FURUNO fish finder equipment ...
The date reads 5 6 20 = 2023 June 20
since the Japanese calendar year in the Reiwa Era is used here
Formula: Reiwa year + 2018 = Gregorian year

13270.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft B-30CW + HL7211 + JA814A + N847FD + 9V-SHT + flight CSZ972
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

13342.0 kHz H10 HFDL Muan Air, South Korea, + aircraft B-32A1 + B-320H + B-329L + B-329M + B-6011 + B-6323 + HP1533 + flight CCA270
MOC = Meteorological Operations Center
PD = Profile Descent

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

11090.0 kHz KVM70 Honolulu Meteo, Hawaii

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

10060.0 kHz H10 HFDL Muan Air, South Korea, + aircraft B-6926 + HL7792 + HS-XTH + JA12VA + N853GT + RA73104 + RPC8612 + 9M-MAB + flight AV9771
CFD = Centralized Fault Display
DFB = Digital Flight Book
ECS = Environmental Control System
FCNT = (DAR) Frame Counter
GLS = GBAS (Ground-Based Augmentation System) Landing System
ISFC = Indicated Specific Fuel Consumption
IVV = Inertial Vertical Speed
S/N L S/N R = Left/Right Engine Serial Number
VAC = Vertical Acceleration
CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here

Codes of ACARS Message Labels can be found here

518.0 kHz VBR Canadian Coast Guard Ferndale ONT, Canada

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

518.0 kHz Parangipettai Radio, India
IMD = India Meteorological Department

21997.0 kHz H13 HFDL Santa Cruz Air, Bolivia, + aircraft ET-ARF + HP1533 + PK-GMO + 60023B + flight AZU489
This is Flybondi's Boeing 737-800
registered in JAN 2023 as LV-KEF
and entered into service in FEB 2023,
leased from Pembroke in Dublin, Ireland
However, the avionics continues to transmit
its original Garuda callsign in downlink messages ...
Cruise data SAVY - SABE ...
DFB = Digital Flight Book
MDPWI = Meteorological Data - Predicted Wind for FL 340
REQPWI = Predicted Wind Request for FL 340

16971.0 kHz JJC Kyodo Tsushin Tokyo, Japan

518.0 kHz HZH Jeddah Radio, Saudi Arabia
BA = British Admiralty

17919.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft B-KQU + JA10VA + N617FE + N878FD + flight AS0848
AGM = Miscellaneous Air/Ground Message
TOCG = Take Off Centre of Gravity
ZFCG = Zero Fuel Centre of Gravity
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

21997.0 kHz H13 HFDL Santa Cruz Air, Bolivia, + aircraft G-VLUV + HC-CTX + HP1533 + PR-YYH + flight AVA933
DT = Destination, followed by the runway number
FN = Flight Number
RESPWI/AC = FMS downlink acceptance and insertion of PWI = Predicted Wind uplink data
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

10084.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft B-325J + VP-BXD + 9V-SHW + 9V-SJD + 9V-SKU + flight UAL96
RA73153 is yet another "re-registered" (read: seized) Airbus A350-941 aircraft
leased from SMBC Aviation Capital (= Sumitomo Mitsui Bank Corporation)
in Dublin, Ireland, and originally registered as VP-BXD in Bermuda ...
However, the avionics continues to transmit
its original Aeroflot callsign in downlink messages ...
AGM = Miscellaneous Air/Ground Message
CMS = Cabin Management System
MSN = Manufacturer's Serial Number
• DELAY is a critical procedure, designed to prevent pilots
from acting on any old CPDLC messages
that might have been delayed in the network
The most serious of such cases would be
the pilot executing a clearance that was no longer valid
CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here

Codes of ACARS Message Labels can be found here

13276.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft ET-AUC
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

490.0 kHz Santa Marta Radio, Colombia

8481.8 kHz 5253 5570 Digital data stations

17928.0 kHz H17 HFDL Telde Air, Canary Islands, + aircraft ET-ATR
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

Communist China's criminal territorial claim across the South China Sea
all the way down to the shores of Indonesia ...
Click to enlarge!

11312.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft B-20EH + B-323Z + HL7623 + N894FD + flight ANA897
DEST BURN + ALTN + RESERVE + HOLD = MIN RQD + RPF + OTHER = TKOF + TAXI = TTL FOB ...
AGM = Miscellaneous Air/Ground Message
CI = Consistency Index
FOD = Fuel Over Destination
GOCC = Global Operations Control Center
LMTOGW = Limiting Maximum Operational Take-Off Gross Weight
MFWF = Minimum Flight Weight Fuel
RPF = Reliability Protection Fuel
TOCO = Take-Off Computation
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus the Figure of Merit code or 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 Buenaventura Radio, Colombia

13342.0 kHz H10 HFDL Muan Air, South Korea, + aircraft B-308L + HS-XTG + JA820P + JA894A + N882FD + N891FD + PK-BGZ + 9V-SMQ + flight UPS61
ADF = Automatic Direction Finder
CFB = Centralized Fault Book
DMC = Display Management Computer
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
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
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

8416.5 kHz UAT Moscow Radio, Russian Federation

8927.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft A6-XWC + B-LRC + G-VNYC + N120FE + N576UP + N950AV + N5153A + flight CAO107
CFB = Centralized Fault Book
CIDS = Cabin Intercommunication Data System
DFD = Digital Flight Data
DT = Destination, followed by the runway number
FICON = Field Conditions
FLR = Failure
FN = Flight Number
FR = Fault Report, followed by the Date-Time Group
VSC = Vacuum System Controller
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 CBM Magallanes Radio, Chile

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

21997.0 kHz H13 HFDL Santa Cruz Air, Bolivia, + aircraft HP1713 + N617FE + PR-YYD + XA-VYD + flight FX1401
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
WN = Warning Number, followed by the Date-Time Group

13270.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft HL7640 + 9V-SKW + flight CSZ926
OCC = Operations Control Centre

13315.0 kHz H13 HFDL Santa Cruz Air, Bolivia, + aircraft EI-KBP + G-VWOO + N12004 + flight AEA042
Increasing solar activity - and the ionosphere going totally crazy:
Fuel calculation uplink for a UARR - LTAI regional hop ... via Santa Cruz!
AGM = Miscellaneous Air/Ground Message
OWE = Operating Weight Empty
TOF = Take-Off Fuel
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

13315.0 kHz H13 HFDL Santa Cruz Air, Bolivia, + aircraft EI-MYY + G-VLUV + N856GT + PR-TYK + PR-TYR + PR-YYF + flight GTI803
DFB = Digital Flight Book
ETE = Estimated Time Elapsed
FMC = Flight Management Computer
RESREQ/AK = FMS downlink acknowledgement of a REQFPN uplink
TI2 = Terminal Information Request
TLA = Thrust Lever Angle

4298.0 kHz NOJ United States Coast Guard Kodiak, Alaska

8569.8 kHz PWZ Brazilian Navy Rio de Janeiro, Brazil

8569.8 kHz PWZ Brazilian Navy Rio de Janeiro, Brazil
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

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

518.0 kHz LGQ Rogaland Radio, Norway

4209.5 kHz XVN Nha Trang Radio, Viet Nam

8658.0 kHz JFX Kagoshima Fisheries Radio, Japan
Latest tuna market prices ...

8658.0 kHz JFX Kagoshima Fisheries Radio, Japan
Typhoon warning ...
The date reads 5 6 2 = 2023 June 2
since the Japanese calendar year in the Reiwa Era is used here
Formula: Reiwa year + 2018 = Gregorian year

518.0 kHz Fuzhou Radio, China

8424.0 kHz SVO Olympia Radio, Athens, Greece

518.0 kHz 9VG Singapore Radio, Singapore
SPOCC = Singapore Port Operations Control Centre
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 ...
TSS = Traffic Separation Scheme

21928.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-6753 + B-7368 + JA818P + JA820P + JA824A + JA878A + 9V-SHA + flight ETH673
AGM = Miscellaneous Air/Ground Message
LGTP = Light Plus Turbulence = relatively greater intensity
OCC = Operations Control Centre
PD = Profile Descent
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 VAU Canadian Coast Guard Chebogue NS, Canada

13315.0 kHz H13 HFDL Santa Cruz Air, Bolivia, + aircraft C-FKAU + EI-KGD + HP1525 + N860GT + PR-TYV + flight 231
Increasing solar activity - and the ionosphere going totally crazy:
POSREP downlink from a ZBAA - UACC flight ... via Bolivia!
CFD = Centralized Fault Display
ECS = Environmental Control System
HCC = Hub Control Center
SITA = Societe Internationale de Telecommunication Aeronautique

9165.0 kHz HLL Soul Meteo, South Korea

11306.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft A7-BGA + B-30CW + B-8576 + B-18909 + C-FRSI + EI-KDC + N883FD + UK32015 + flight CCA190
BI = Basic Index
DOI = Dry Operating Index
DT = Destination, followed by the runway number
DX = Dispatcher
FN = Flight Number
LILAW = Loaded Index at LAW
LITOW = Loaded Index at TOW
LIZFW = Loaded Index at ZFW
LWMAC = Landing Weight Mean Aerodynamic Chord
TOMAC = Take-Off Mean Aerodynamic Chord
TS = Time Stamp
ZFMAC = Zero Fuel Mean Aerodynamic Chord
PRG = Flight Progress Report sent shortly
(i.e. 1 hour - 10 minutes) before arrival,
typically including destination airport followed by
estimated runway for landing, estimated FOB, ETA, and FN

11306.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-303A + B-1989 + B-5942 + JA879A + N629UP + flight SJV341
Code figures for PANC runways braking action - see e.g. here
AGM = Miscellaneous Air/Ground Message
DFB = Digital Flight Book
EEP = ETOPS Entry Point
TI2 = Terminal Information Request
The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles

The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus the Figure of Merit code or 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 XSG Shanghai Radio, China
MSA = Maritime Safety Administration

8416.5 kHz NMF United States Coast Guard Boston MA, United States of America

8416.5 kHz NMF United States Coast Guard Boston MA, United States of America

12412.5 kHz NOJ United States Coast Guard Kodiak, Alaska

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

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

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

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 5BA Nicosia Radio, Cyprus
JRCC = Joint Rescue Coordination Centre
Warnings still in force - received 090600Z APR 2023

518.0 kHz Gislovshammar Radio, Sweden

8977.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft N573DZ + N861FD + N14019 + 9V-SMU + flight VS0091
Initial part of message C1 is missing ...
LFPO - OMDB routing calculation ...
MIN RQD + RPF + OTHER = TKOF + TAXI = TTL
CI = Consistency Index
FOD = Fuel Over Destination
GOCC = Global Operations Control Center
LMTOGW = Limiting Maximum Operational Take-Off Gross Weight
MEL = Minimum Equipment List
MFWF = Minimum Flight Weight Fuel
RPF = Reliability Protection Fuel
TOCO = Take-Off Computation
• 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
The date reads 5 4 6 = 2023 April 6
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-30C2 + B-18918 + JA805A + N852FD + VN-A222 + 9V-SCA + 9V-SMW + flight CES232
AGM = Miscellaneous Air/Ground Message
SCV = Surge Control Valve
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FCA = Facilities Contact Advisory
FMH = Facilities Message Header = Flight Number
CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here

Codes of ACARS Message Labels can be found here

8416.5 kHz NMC United States Coast Guard San Francisco CA, United States of America
NGA = National Geospatial-Intelligence Agency

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

518.0 kHz XSI Sanya Radio, China

490.0 (!) kHz Don Sak Radio, Thailand
BKK = Bangkok
005671000 is the station's MMSI (Maritime Mobile Service Identity) code
Warnings still in force - received 271020Z MAR 2023
Message OA12 is a bit confusing ...
See 5 AUG 2021 NAVTEX Panel Report

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

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

8416.5 kHz L2C Argentinian Coast Guard Buenos Aires, Argentina
SIHN = Servicio de Hidrografia Naval

8927.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft N866FD + 9V-SGF + 9V-SHB + flight ACA004 + CSC836
CFD = Centralized Fault Display
ETO = Estimated Time of Overfly
OCCS = Operations Control Centre Singapore
SCV = Surge Control Valve
• 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
• 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 UIB Magadan Radio FE, Russian Federation

9165.0 kHz HLL Soul Meteo, South Korea

518.0 kHz VAJ Canadian Coast Guard Prince Rupert BC, Canada
Haida Gwaii = ex Queen Charlotte Islands

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

8927.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-328W + B-2420 + B-6511 + B-18901 + EI-MAA + JA205P + JA893A + JA894A + JA896A + N572FE + N858FD + RPC8619 + flight CES631
Flight parameters and enroute weather ZLXY - ZBAD ...
ZFW + TOF = TOW - TIF = LAW
AGM = Miscellaneous Air/Ground Message
AI = Arrival Information
DFB = Digital Flight Book
DFD = Digital Flight Data
DOI = Dry Operating Index
DI = Departure Information
GC = Ground Connections
OMC = Operation Management Center
SCV = Surge Control Valve
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
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

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

16559.0 kHz XSG Shanghai Radio, China

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

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

12786.0 kHz NMC United States Coast Guard San Francisco CA, United States of America
NCEP = National Centers for Environmental Prediction

12786.0 kHz NMC United States Coast Guard San Francisco CA, United States of America
NCEP = National Centers for Environmental Prediction

17919.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft A6-EEU + G-VLUV + N101FE + N608UP + N618UP + 5Y-KYF + 9V-SCK + flight CCA137
Increasing solar activity - and the ionosphere going totally crazy:
METAR uplink for a HKJK - FAOR regional hop ... via Guam!
AA = Arrival Airport
CFD = Centralized Fault Display
DA = Departure Airport
DFD = Digital Flight Data
FPN = Flight Plan Report downlink
MCC = Maintenance Control Centre
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

17919.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-327V + flight DKH126
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

ASFC = Avionics Server Function Cabinet
C/B = Circuit Board
CMS = Cabin Management System
MIAM = Media Independent Aircraft Message
MSN = Manufacturer's Serial Number
OSFC = Open-World Server Function Cabinet
PDU = Pilot Display Unit
RTR = Ready To Receive

13988.5 kHz JMH4 Tokyo Meteo, Japan

13988.5 kHz JMH4 Tokyo Meteo, Japan

490.0 kHz IGS Piombino Radio, Italy

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

490.0 kHz OST Oostende Radio, Belgium

490.0 kHz SVL Limnos Radio, Greece

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

13570.0 kHz HLL Soul Meteo, South Korea

518.0 kHz CBV Valparaiso Radio, Chile
R/V = Research Vessel

518.0 kHz VCO Canadian Coast Guard Port Caledonia NS, Canada

518.0 kHz OXF Simiutaq Radio, Greenland
DMI = Danish Meteorological Institute
Warnings still in force - received 091000Z MAR 2023!

518.0 kHz Sandakan Radio, Sabah, Malaysia
GK = Gumusut-Kakap Oil Field
OBN = Ocean Bottom Node
ROV = Remotely Operated Vehicle
Warnings still in force - received 061900Z MAR 2023

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

11030.0 kHz VMC Charleville Meteo QLD, Australia
MSLP = Mean Sea Level Pressure
RSMC = Regional Specialized Meteorological Centre

11030.0 kHz VMC Charleville Meteo QLD, Australia

5807.0 kHz ZKLF Auckland Meteo, New Zealand

518.0 kHz UCV Okhotsk Radio FE, Russian Federation

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

8439.0 kHz PBB Dutch Navy Den Helder, Netherlands

518.0 kHz Vakalpudi Radio, India
CWC = Cyclone Warning Centre
IMD = India Meteorological Department
MMB = Maharashtra Maritime Board

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

4298.0 kHz NOJ United States Coast Guard Kodiak, Alaska

16907.5 kHz JFA Funabashi Fisheries Radio, Japan
The date reads 5 2 21 = 2023 February 21
since the Japanese calendar year in the Reiwa Era is used here
Formula: Reiwa year + 2018 = Gregorian year

8113.5 kHz RMP Commonwealth of Independent States Navy Kaliningrad, Russian Federation

8665.0 kHz XSG Shanghai Radio, China

13033.0 kHz FUF French Navy Fort de France, Martinique

13570.0 kHz HLL Soul Meteo, South Korea

518.0 kHz EAL Las Palmas Radio, Canary Islands

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 4XO Haifa Radio, Israel
IMOT = Israel Ministry of Tourism

518.0 kHz 3VL Kelibia Radio, Tunisia
NTM = Notice to Mariners

518.0 kHz 9HD Valetta Radio, Malta
VTS = Vessel Traffic Service

518.0 kHz TAH Istanbul Radio, Turkey

518.0 kHz SUZ Serapeum Radio, Egypt
ADES = Advanced Drilling Systems
BA = British Admiralty

6450.0 kHz PWZ Brazilian Navy Rio de Janeiro, Brazil

518.0 kHz XVT Da Nang Radio, Viet Nam

13988.5 kHz JMH4 Tokyo Meteo, Japan

13988.5 kHz JMH4 Tokyo Meteo, Japan

4209.5 kHz TAH Istanbul Radio, Turkey

16971.0 kHz JJC Kyodo Tsushin Tokyo, Japan
The third frame shows the news broadcast schedule in JST = Japan Standard Time

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

490.0 kHz UUI Odessa Radio, Ukraine
Warnings still in force - received 050230Z FEB 2023

490.0 kHz 9AS Split Radio, Croatia

490.0 kHz Antalya Radio, Turkey

13074.0 kHz JFC Misaki Fisheries Radio, Japan
The date reads 5 2 3 = 2023 February 3
since the Japanese calendar year in the Reiwa Era is used here
Formula: Reiwa year + 2018 = Gregorian year

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

11030.0 kHz VMC Charleville Meteo QLD, Australia

8106.9 kHz SWA28 Athens Meteo, Greece

4610.0 kHz GYA Royal Navy London, United Kingdom

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

8424.0 kHz SVO Olympia Radio, Athens, Greece

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

518.0 kHz EAV Valencia Radio, Spain

518.0 kHz EAC Tarifa Radio, Spain

16971.0 kHz JJC Kyodo Tsushin Tokyo, Japan

490.0 kHz Grindavik Radio, Iceland
Faxafloa = Reykjavik Harbour
Landhelgisgaeslan = Coast Guard

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 Balasore Radio, India

16959.8 kHz FUJ French Navy Noumea, New Caledonia

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

4346.0 kHz NMC United States Coast Guard San Francisco CA, United States of America

3855.0 kHz DDH3 Hamburg Meteo, Germany

518.0 kHz SVK Kerkyra Radio, Greece
Message KA22 has been cancelled in the meantime ...

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

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

518.0 kHz LFO Oerlandet Radio, Norway

4235.0 kHz NMF United States Coast Guard Boston MA, United States of America

4235.0 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

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

490.0 kHz EJM Irish Coast Guard Malin Head, Ireland

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 UDN Novorossiysk Radio, Russian Federation

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

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

2628.0 kHz VMC Charleville Meteo QLD, Australia

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

6340.5 kHz NMF United States Coast Guard Boston MA, United States of America
NCEP = National Centers for Environmental Prediction

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)

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

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

518.0 kHz ZBM Hamilton Harbour Radio, Bermuda

16953.3 kHz 6WW French Navy Dakar, Senegal

518.0 kHz LZW Varna Radio, Bulgaria
VTS = Vessel Traffic Service

518.0 kHz Bjuroklubb Radio, Sweden

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

4209.5 kHz SVH Iraklion Radio, Greece

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

13270.0 kHz H06 HFDL Hat Yai Air, Thailand, + flight ANA897

8416.5 kHz VFF Canadian Coast Guard Iqaluit NUN, Canada

8416.5 kHz VFF Canadian Coast Guard Iqaluit NUN, Canada

518.0 kHz NMF United States Coast Guard Boston MA, United States of America
BNM = Broadcast Notice to Mariners

12695.5 kHz KFS San Francisco Radio CA, United States of America
MMP = Masters, Mates and Pilots

518.0 kHz Thailand
BKK = Bangkok
This is not HSA, but most likely one of the new NAVTEX stations
announced in the 5 AUG 2021 NAVTEX Panel Report

490.0 kHz Sellia Marina Radio, Italy

11354.0 kHz H09 HFDL Barrow Air, Alaska, + flight ACA850 + 7G0014

518.0 kHz NMR United States Coast Guard San Juan, Puerto Rico

8477.3 kHz FUX French Forces Le Port de la Riviere des Galets, Reunion
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

4296.0 kHz Digital data station, Japan
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

10093.0 kHz H09 HFDL Barrow Air, Alaska, + aircraft A6-EVF + EI-EJL + JA816A + flight TS0093
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
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 Basic or Periodic Report gives position - trajectory intent - speed vector data
plus the Figure of Merit code or 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

11184.0 kHz H03 HFDL Reykjavik Air, Iceland, + flight MAS4

518.0 kHz SVH Iraklion Radio, Greece

11090.0 kHz KVM70 Honolulu Meteo, Hawaii

10093.0 kHz H09 HFDL Barrow Air, Alaska, + aircraft A6-EVI + A6-EVJ + JA382A + N625UP + RA73678 + flight SIA208
Mahalo = Thank you
CFD = Centralized Fault Display
ECS = Environmental Control System
HNLOC = Honolulu Operations Control
• 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
• Code figures for EFHK runways braking action - see e.g. here
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
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

10081.0 kHz H07 HFDL Shannon Air, Ireland, + flight AIC147 + CCA581

17928.0 kHz H17 HFDL Telde Air, Canary Islands, + flight KNE111

518.0 kHz Parangipettai Radio, India
IMD = India Meteorological Department

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

8927.0 kHz H16 HFDL Barrigada Air, Guam, + flight ANA224 + ANA879

10093.0 kHz H09 HFDL Barrow Air, Alaska, + aircraft CN-RGZ + JA15KZ + N605UP + N858FD + N868FD + flight TS0862
CCO = Operations Control Centre
CFD = Centralized Fault Display
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

490.0 kHz Porto Santo Radio, Madeira

518.0 kHz ZSC Cape Town Radio, South Africa (Republic of)

518.0 kHz VCG Canadian Coast Guard Moisie QUE, Canada

19448.5 kHz Digital data station

518.0 kHz JNL Otaru Radio, Japan

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

518.0 kHz LGT Tjoeme Radio, Norway

518.0 kHz IQM Mondolfo Radio, Italy

8486.3 kHz CTA Portuguese Navy Lisbon, Portugal

12668.3 kHz FUG French Navy Saissac, France

17615.0 RCV Commonwealth of Independent States Navy Sevastopol', Ukraine

518.0 kHz VOK Canadian Coast Guard Cartwright NFLD, Canada

518.0 kHz Kyaukphyu Radio, Myanmar

518.0 kHz RFA Astrakhan Radio, Russian Federation
VTS = Vessel Traffic Service

10081.0 kHz H07 HFDL Shannon Air, Ireland, + aircraft CS-TKQ + EI-EJL + OY-KAM + 5-LAP + 5A-WLA + flight HY9619
CFB = Centralized Fault Book
CFDS = Centralized Fault Display System
CIDS = Cabin Intercommunication Data System
DAR = Data Access Recorder
ECAM = Electronic Centralized Aircraft Monitoring
FCOM = Flight Crew Operation Manual
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
REQPWI = Predicted Wind Request for FL 360 370 380
SGH = Stockholm Ground Handling
STOOPSK = Stockholm Operations Scandinavian Airlines
TPIS = Tire Pressure Indicator System
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 each

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 Taganrog Radio, Russian Federation

518.0 kHz L2G Argentinian Coast Guard Buenos Aires, Argentina
VS = Vessel Service

8424.0 kHz UDK Murmansk Radio, Russian Federation

518.0 kHz V5W Walvis Bay Radio, Namibia
LNW = Local Navigational Warning
Warnings still in force - received 202000Z FEB 2022

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

518.0 kHz Izmir Radio, Turkey
Warnings still in force - received 160520Z FEB 2022

7396.9 kHz HSW64 Bangkok Meteo, Thailand

7396.9 kHz HSW64 Bangkok Meteo, Thailand

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

518.0 kHz UBE Petropavlovsk - Kamchatskiy Radio FE, Russian Federation
Africa Cape = Mys Afrika is ... the easternmost point of the Kamchatka Peninsula!

7657.0 kHz RDL Commonwealth of Independent States Navy Vilyeyka, Belarus

518.0 kHz Berdyans'k Radio, Ukraine

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

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

12711.0 kHz PWZ Brazilian Navy Rio de Janeiro, Brazil

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 2023 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 25,000 (twenty five thousand!) fascinating screenshots are available on our unique Digital Data Decoder Screenshots USB Stick!