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!


518.0 kHz Balasore Radio, India
IMD = India Meteorological Department
MMB = Maharashtra Maritime Board

16806.5 kHz L2C Argentinian Coast Guard Buenos Aires, Argentina

16806.5 kHz L2C Argentinian Coast Guard Buenos Aires, Argentina

6661.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft CC-BBJ + CC-BGC + CC-CXG + C-FNNH + EC-NJM + HZ-SKY + N588FE + N607UP + flight UAL971
CDP = Computer Diagnostics Program
CFD = Centralized Fault Display
DFD = Digital Flight Data
EDP = Engine Display Panel
FOM = Flight Operational Manual
FWS = Flight Warning System
ITWS = Integrated Terminal Weather System
MOC = Meteorological Operations Center
MTC = Maintenance Technical Center
• 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

4209.5 kHz XSG Shanghai Radio, China

11387.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft C-GUBL + F-HTYG + OH-LWN + TC-LGJ + flight ACA807
CFB = Centralized Fault Book
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
PSCU = Proximity Switch Control Unit
VSC = Vacuum System Controller
WN = Warning Number, followed by the Date-Time Group
• 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 PKX Jakarta Radio, Indonesia

518.0 kHz XVS Ho Chi Minh City Radio, Viet Nam
Warnings still in force - received 291950Z NOV 2023

5655.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft A6-ATD + A6-BLK + HS-XTH + 9V-SGF + 9V-SMC + flight CCA980
CFB = Centralized Fault Book
CIDS = Cabin Intercommunication Data System
FCMC = Fuel Control and Monitoring Computer
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
OCCS = Operations Control Centre Singapore
PSU = Passenger Service Unit
REQPWI = Predicted Wind Request for FL 380 360 340 320
TI2 = Terminal Information Request
WN = Warning Number, followed by the Date-Time Group
CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

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

Codes of ACARS Message Labels can be found here

5655.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft A6-ATD + B-5948 + HL7641 + JU1410 + 9V-SHM + flight APJ91
ADIRU = Air Data Inertial Reference Unit
CFB = Centralized Fault Book
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
GPSSU = Global Positioning System Sensor Unit
IR = Inertial Reference
MMR = Multi-Mode Receiver
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
• Engine Cruise Report ZBAA - VTBS ...
= collection of data over a period of time
in which the aircraft met the appropriate stability criteria
If no stability is detected, then the report
ends with NO STABLE FRAME CONDITION
• Aircraft in-flight performance parameters such as OIT = Oil Temperature are explained e.g. here
• The yellow table below shows a typical parameters list ...
CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

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

Codes of ACARS Message Labels can be found here

518.0 kHz VBR Canadian Coast Guard Ferndale ONT, Canada

17040.0 kHz Digital data station

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

10084.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft DQ-FJU + N855FD + RPC9934 + flight APJ10
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FCA = Facilities Contact Advisory
FMH = Facilities Message Header = Flight Number
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

6565.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft A6-BLQ + B-LXQ + B-308W + B-58501 + OE-LFD + flight UAL6
AGM = Miscellaneous Air/Ground Message
CFD = Centralized Fault Display
OCC = Operations Control Center
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
Latest tuna market prices ...
The last line is the schedule for the next broadcast
of this data in JST = Japan Standard Time
The date reads 5 11 28 = 2023 November 28
since the Japanese calendar year in the Reiwa Era is used here
Formula: Reiwa year + 2018 = Gregorian year

518.0 kHz 9AS Split Radio, Croatia

518.0 kHz 9HD Valetta Radio, Malta

8416.5 kHz UAT Moscow Radio, Russian Federation

4209.5 kHz TAH Istanbul Radio, Turkey

4209.5 kHz TAH Istanbul Radio, Turkey

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

13315.0 kHz H13 HFDL Santa Cruz Air, Bolivia, + aircraft VH-EXZ + flight AVA022
POSREP = POS, WP, ATO, FL, next+1 WP, ETO, next+2 WP,
ETO, temperature, wind, FOB or SOG, time stamp, date, HEX serial
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FCA = Facilities Contact Advisory
FCO ADS = Facilities Contact ADS-C
FCO ATC = Facilities Contact CPDLC
FCP = Facilities Contact Response
FMH = Facilities Message Header = Flight Number
FPO = Facilities Current Position
FRP = Facilities Response
• 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

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 VFF Canadian Coast Guard Iqaluit NUN, Canada

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

8939.0 kHz H10 HFDL Muan Air, South Korea, + aircraft B-18903 + HL7634 + JA812A + JA894A + N512DN + flight CPA105
FMC = Flight Management Computer
FMS = Flight Management System
TI2 = Terminal Information Request
CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

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

Codes of ACARS Message Labels can be found here

8939.0 kHz H10 HFDL Muan Air, South Korea, + aircraft B-2032 + B-7836 + OH-LWL + RA73673 + VN-A891 + 9V-SMZ + flight APJ235 + CES740
RA73673 is the "re-registered" (read: seized) Aurora Airbus A319-111
leased from AMCK (Aviation Maverick Cheung Kong) Holdings Ireland Limited
and originally registered as VQ-BBD in Bermuda ...
A NOTAM decoder can be found e.g. here
Message 3E is incomplete ...
CFB = Centralized Fault Book
DA = Departure Airport
DM = Time Stamp
DS = Destination Airport
LIDO = Lufthansa Integrated Dispatch Operation =
FMS software used by 180+ airlines worldwide
PD = Profile Descent
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

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

Codes of ACARS Message Labels can be found here

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

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

4209.5 kHz XVN Nha Trang Radio, Viet Nam

8927.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-327Y + B-5961 + B-6878 + EI-MAE + N101FE + N886FD + RA73723 + flight PAL212
CFB = Centralized Fault Book
REQPWI = Predicted Wind Request for FL 350 330
RESPWI/AC = FMS downlink acceptance and insertion of PWI = Predicted Wind uplink data
TI2 = Terminal Information Request
WN = Warning Number, followed by the Date-Time Group
The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles

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

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

Codes of ACARS Message Labels can be found here

490.0 kHz Don Sak Radio, Thailand
005671000 is the station's MMSI (Maritime Mobile Service Identity) code
Warnings still in force - received 260620Z NOV 2023
See 5 AUG 2021 NAVTEX Panel Report

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

11306.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-2291 + JA935A + JY-AYV + 9V-SHV + 9V-SMS + flight ANA181
Increasing solar activity - and the ionosphere going totally crazy:
POSREP downlink from a OJAI - OERK regional hop ... via Guam!
Code figures for WSSS runways braking action - see e.g. here
HNDMAT = Haneda Meteorological Advice Team
OMC = Operation Management Center
PD = Profile Descent
RSCD = Runway Surface Condition
RWYCC = Runway Condition Code
TI2 = Terminal Information Request
CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

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

Codes of ACARS Message Labels can be found here

8927.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-20C6 + B-323H + B-18907 + JA207P + JA932A + RA73107 + RA73228 + 9V-SMB + flight CSC329
DFB = Digital Flight Book
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

9165.0 kHz HLL Soul Meteo, South Korea

518.0 kHz VBA Canadian Coast Guard Pass Lake ONT, Canada

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

10063.0 kHz H11 HFDL Panama City Air, Panama, + aircraft CC-BGN + EI-MAA + flight AVA087
ACDM = Airport Collaborative Decision Making
DFB = Digital Flight Book
DT = Destination, followed by the runway number
FN = Flight Number
TI2 = Terminal Information Request
TS = Time Stamp
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAK = Facilities Acknowledgement Message
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response CPDLC
FCO ADS = Facilities Contact ADS-C
FCO ATC = Facilities Contact CPDLC
FMH = Facilities Message Header = Flight Number
FPO = Facilities Current Position
PRG = Flight Progress Report sent shortly
(i.e. 1 hour - 10 minutes) before arrival,
typically including destination airport followed by
estimated runway for landing, estimated FOB, ETA, and FN

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

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

Codes of ACARS Message Labels can be found here

4209.5 kHz XVG Hai Phong Radio, Viet Nam

6559.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft HL8501 + N853FD + N883FD + N23983 + flight AS0352 + UPS81
POSREP = POS, WP, ATO, FL, next+1 WP, ETO, next+2 WP,
ETO, temperature, wind, FOB or SOG, time stamp, date, HEX serial
DFB = Digital Flight Book
DT = Destination, followed by the runway number
FN = Flight Number
TS = Time Stamp
PRG = Flight Progress Report sent shortly
(i.e. 1 hour - 10 minutes) before arrival,
typically including destination airport followed by
estimated runway for landing, estimated FOB, ETA, and FN

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

518.0 kHz NOJ United States Coast Guard Kodiak, Alaska
POC = Point of Contact

6559.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft HL8501 + JA09MC + JA825A + N513DZ + N574UP + N609UP + N883FD + 9V-SJD + flight AVA847
PACD is an ETOPS emergency alternate airport for trans-Pacific flights ...
CDP = Computer Diagnostics Program
DFD = Digital Flight Data
EDP = Engine Display Panel
FWS = Flight Warning System
HPP = High Pressure Pump
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
CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

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

Codes of ACARS Message Labels can be found here

9165.0 kHz HLL Soul Meteo, South Korea

518.0 kHz Parangipettai Radio, India
IMD = India Meteorological Department

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

13276.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft A7-ALY + B-LXB + F-HTYN + G-DHLE + JA880A + N869FD + N877FD + XA-LRL + flight ETH575
POSREP = POS, WP, ATO, FL, next+1 WP, ETO, next+2 WP,
ETO, temperature, wind, FOB or SOG, time stamp, date, HEX serial
GOCC = Global Operations Control Center
LLD = Large Lateral Deviation = 10 NM or more without ATC approval
TOCO = Take-Off Computation
• 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 A9M Hamala Radio, Bahrain
BA = British Admiralty
MENAS = Middle East Navigation Aids Service
MEGULITE = Middle East Gulf Lighting Service
VTIS = Vessel Traffic Information Service

6661.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft A7-ALY + G-DHLE + F-HRBG + F-HUVB + N26906 + flight M38488
POSREP = POS, WP, ATO, FL, next+1 WP, ETO, next+2 WP,
ETO, temperature, wind, FOB or SOG, time stamp, date, HEX serial
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

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

13074.0 kHz JFC Misaki Fisheries Radio, Japan
The date reads 5 11 21 = 2023 November 21
since the Japanese calendar year in the Reiwa Era is used here
Formula: Reiwa year + 2018 = Gregorian year

13074.0 kHz JFC Misaki Fisheries Radio, Japan
JAFIC = Japan Fisheries Information Service Center
The date reads 5 11 21 = 2023 November 21
since the Japanese calendar year in the Reiwa Era is used here
Formula: Reiwa year + 2018 = Gregorian year

5655.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft B-LDQ + RA73142 + TC-LGC + 9V-SHC + 9V-SHQ + 9V-SKZ + flight NCA227
Code figures for EGLL runways braking action - see e.g. here
PDU = Pilot Display Unit
TI2 = Terminal Information Request
• DELAY is a critical procedure, designed to prevent pilots
from acting on any old CPDLC messages
that might have been delayed in the network
The most serious of such cases would be
the pilot executing a clearance that was no longer valid
The 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 XSG Shanghai Radio, China
MSA = Maritime Safety Administration

6559.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft C-FIVQ + flight AC0036 + IBE640
AGFSR = Air to Ground Flight Situation Report

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

8658.0 kHz JFX Kagoshima Fisheries Radio, Japan
Maritime safety information for NAVAREAs 10/11 ...
The date reads 5 11 20 = 2023 November 20
since the Japanese calendar year in the Reiwa Era is used here
Formula: Reiwa year + 2018 = Gregorian year

8942.0 kHz H07 HFDL Shannon Air, Ireland, + aircraft EC-NBX + OE-LZF + TF-PPC + 5A-LAK + flight BAW73R + IBE665
CFB = Centralized Fault Book
DA = Departure Airport
DAR = Data Access Recorder
DM = Time Stamp
DS = Destination Airport
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

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 airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

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

Codes of ACARS Message Labels can be found here

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

490.0 kHz OST Oostende Radio, Belgium

11306.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-18916 + HL7641 + HL8502 + JA14KZ + JA15VA + JA815A + RPC9930 + flight CCA272
ADC = Air Defence Clearance
ADNC = Air Defence Notification Centre
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 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 TAH Istanbul Radio, Turkey

518.0 kHz NMA United States Coast Guard Miami FL, United States of America
BNM = Broadcast Notice to Mariners
JSWTR = Jacksonville Shallow Water Training Range
GUNEX = Gunnery Exercise

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

490.0 kHz UWT Taganrog Radio, Russian Federation
Warnings still in force - received 190120Z NOV 2023

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

16963.3 kHz FUF French Navy Fort de France, Martinique

16806.5 kHz NMF United States Coast Guard Boston MA, United States of America
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

6661.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft CC-BGF + CC-CXJ + N564LA + N29978 + flight UAL879
DFB = Digital Flight Book
DP = Differential Pressure
EGT = Exhaust Gas Temperature
FCNT = (DAR) Frame Counter
FF = Fuel Flow (for engines 1 + 2)
ISFC = Indicated Specific Fuel Consumption
OIP = Oil Pressure
OIQ = Oil Quantity
OIT = Oil Temperature
PS3 = Compressor Discharge Static Air Pressure
RA = Radio Altimeter
S/N L S/N R = Left/Right Engine Serial Number
TI2 = Terminal Information Request
TLA = Thrust Lever Angle
VBV = Variable Bleed Valve
The Lateral Deviation Change Event is triggered
when the aircraft's actual position exceeds a lateral distance parameter
from the aircraft's expected position on the active flight plan

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 Vakalpudi Radio, India
IMD = India Meteorological Department

6559.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft JA15KZ + JA874A + N127FE + N580UP + N863GT + N943AV + N26967 + VN-A506 + flight APJ898
CFD = Centralized Fault Display
DT = Destination, followed by the runway number
ECS = Environmental Control System
FN = Flight Number
PRG = Flight Progress Report sent shortly
(i.e. 1 hour - 10 minutes) before arrival,
typically including destination airport followed by
estimated runway for landing, estimated FOB, ETA, and FN

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 EQI Abbas Radio, Iran

8416.5 kHz L2C Argentinian Coast Guard Buenos Aires, Argentina

6661.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft N599FE + flight LP2480
CFD = Centralized Fault Display
DFR = Daily Flight Report
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
• 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

6661.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft G-DHLE + JA12KZ + N576FE + N624UP + 9V-SGB + flight AS0550
18 hours nonstop KJFK - WSSS ...
CFD = Centralized Fault Display
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
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles

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

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

Codes of ACARS Message Labels can be found here

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

518.0 kHz JNR Moji Radio, Japan
C/S = Cable Ship
KDDI = Kokusai Denshin Denwa Ido

8677.0 kHz CBV Valparaiso Radio, Chile

10084.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft B-2035 + N855FD + VH-EXZ + flight ANA962
AGM = Miscellaneous Air/Ground Message
AOC = Airline Operations Control
CFB = Centralized Fault Book
DB = Data Base
EOR = End of Report
FDE = Fault Detection and Exclusion
CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

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

Codes of ACARS Message Labels can be found here

10084.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft B-2035 + C-FNND + F-UJCT + JA903P + N574DZ + N580UP + N24973 + RA73180 + flight UAE3HJ
RS message seems to be some approach data downlink
(heading towards UNKL)
or some non-standard ULD cargo configuration ...
AGM = Miscellaneous Air/Ground Message
CDSS = Cockpit Door Surveillance System
CDSU = Cockpit Door Surveillance Unit
CFB = Centralized Fault Book
CFD = Centralized Fault Display
ECS = Environmental Control System
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
LGTM = Light Minus Turbulence = relatively weaker intensity
TPE = Taipei
The Lateral Deviation Change Event is triggered
when the aircraft's actual position exceeds a lateral distance parameter
from the aircraft's expected position on the active flight plan

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

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

Codes of ACARS Message Labels can be found here

6559.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft N599FE + flight CAO104
Perfect CPDLC at 0722 0723 0725 0727 0728 0730 0731 0742Z ...
POSREP = POS, WP, ATO, FL, next+1 WP, ETO, next+2 WP,
ETO, temperature, wind, FOB or SOG, time stamp, date, HEX serial
LLD = Large Lateral Deviation = 10 NM or more without ATC approval
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
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
CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

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

Codes of ACARS Message Labels can be found here

10084.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft B-305X + JA201P + flight ANA860
AGM = Miscellaneous Air/Ground Message
LGTP = Light Plus Turbulence = relatively greater intensity
OCC = Operations Control Center
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles

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

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

Codes of ACARS Message Labels can be found here

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!!!

6661.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft JY-BAA + N602FE + N615FE + flight KQ0514
Detailed L/R engine parameters CYUL - OJAI ...
CFD = Centralized Fault Display
DFB = Digital Flight Book
DFD = Digital Flight Data
FP = Flight Plan

518.0 kHz VOK Canadian Coast Guard Cartwright NFLD, Canada

518.0 kHz VCO Canadian Coast Guard Port Caledonia NS, Canada

8658.0 kHz JFX Kagoshima Fisheries Radio, Japan
Basic fish market prices ...
The date reads 5 11 14 = 2023 November 14
since the Japanese calendar year in the Reiwa Era is used here
Formula: Reiwa year + 2018 = Gregorian year

8942.0 kHz H07 HFDL Shannon Air, Ireland, + aircraft A6-AEH + EC-NGT + N629UP + N843FD + N17015 + flight AT790T
CFB = Centralized Fault Book
WN = Warning Number, followed by the Date-Time Group
• 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 Waypoint Change Event is triggered by a change
made to the Next, or the Next-plus-one waypoint
This change normally occurs due to normal waypoint sequencing by the FMS
The Next or Next-plus-one waypoint can be either an ATS waypoint or a pilot inserted waypoint

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

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

Codes of ACARS Message Labels can be found here

8942.0 kHz H07 HFDL Shannon Air, Ireland, + aircraft B-1243 + CN-ROB + CS-TSI + EI-KGC + OE-LZF + OH-LWR + SU-GDD + SU-GEI + flight DP0893
POSREP = POS, WP, ATO, FL, next+1 WP, ETO, next+2 WP,
ETO, temperature, wind, FOB or SOG, time stamp, date, HEX serial
AGM = Miscellaneous Air/Ground Message
CCO = Operations Control Centre
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FCA = Facilities Contact Advisory
FMH = Facilities Message Header = Flight Number
The Altitude Range Change Event is triggered
when the aircraft's altitude exceeds the altitude ceiling
or floor defined in the contract by the ground system

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

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

Codes of ACARS Message Labels can be found here

8416.5 kHz NMC United States Coast Guard San Francisco CA, United States of America
JRCC = Joint Rescue Coordination Centre

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

518.0 kHz ZBM Hamilton Harbour Radio, Bermuda
NTM = Notice to Mariners
RCC = Rescue Coordination Centre

518.0 kHz 9MG Georgetown Radio, Pinang Island, Malaysia

518.0 kHz EAR La Coruna Radio, Spain

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

6559.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft JA888A + N863FD + N875FD + flight AAR222 + FDX507
Code figures for PANC runways braking action - see e.g. here
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 GPK Portpatrick Radio, United Kingdom
FOSNI = Flag Officer Scotland and Northern Ireland
GUNFACTS = Practice firing intentions by military units
SUBFACTS = Planned or known submarine activity

13276.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft A6-XWA
go2MONITOR's superb Result Viewer allows easy selection of MIAM
out of hundreds of decoded messages by means of advanced filter settings ...
go2MONITOR perfectly re-assembles and decodes MIAM CORE data ...
These are often messages in Airbus' XML format

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

8416.5 kHz L2C Argentinian Coast Guard Buenos Aires, Argentina

8416.5 kHz L2C Argentinian Coast Guard Buenos Aires, Argentina

10027.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft B-LXP + B-320H + B-324A + F-HTYT + F-HUVC + JA09VA + flight BAV162
AGM = Miscellaneous Air/Ground Message
PDC = Pre-Departure Clearance
• 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 XVG Hai Phong Radio, Viet Nam

4209.5 kHz XVN Nha Trang Radio, Viet Nam

16907.5 kHz JFA Funabashi Fisheries Radio, Japan
The date reads 5 11 10 = 2023 November 10
since the Japanese calendar year in the Reiwa Era is used here
Formula: Reiwa year + 2018 = Gregorian year

518.0 kHz EJM Irish Coast Guard Malin Head, Ireland

10027.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft A6-BLK + EI-MGL + VN-A897 + flight SIA28
CFD = Centralized Fault Display
MIAM = Media Independent Aircraft Message
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

11312.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft B-LXC + B-32A6 + N620UP + N12012 + flight CPA828
CFD = Centralized Fault Display
REQPRG = Request Flight Progress Report
TI2 = Terminal Information Request
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 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 ...
= 30 ears = 60 noses = 180 teeth (sorry, just joking ;-))
TSS = Traffic Separation Scheme

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

490.0 kHz HSA Bangkok Radio, Thailand
005671000 is the station's MMSI (Maritime Mobile Service Identity) code
Warnings still in force - received 061500Z NOV 2023
BKK = Bangkok

6559.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft B-1566 + HP9904 + N623UP + N862FD + flight AMX105 + UAL33
RAIM = Receiver Autonomous Integrity Monitoring
A RAIM prediction ensures that available GNSS signals
meet the integrity for a given phase of flight
DFB = Digital Flight Book
RNP = Required Navigation Performance
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

8677.0 kHz CBV Valparaiso Radio, Chile

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

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

11318.0 kHz H13 HFDL Santa Cruz Air, Bolivia, + aircraft B-18902 + PR-YYF + flight AEA042
Perfect OOOI ...
• Engine Cruise Report SBKP - SBPF ...
= 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

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

21997.0 kHz H13 HFDL Santa Cruz Air, Bolivia, + aircraft PR-TYK + PR-TYR + PR-YYI + ZS-SXM + 9V-SGB + flight VIR11B
18 hours nonstop KJFK - WSSS ...
AMDAR = Aircraft Meteorological Data Relay SBGR - FACT
POSREP = POS, WP, ATO, FL, next+1 WP, ETO, next+2 WP,
ETO, temperature, wind, FOB or SOG, time stamp, date, HEX serial
DFB = Digital Flight Book
DT = Destination, followed by the runway number
PER = Performance Report
TI2 = Terminal Information Request
TS = Time Stamp
PRG = Flight Progress Report sent shortly
(i.e. 1 hour - 10 minutes) before arrival,
typically including destination airport followed by
estimated runway for landing, estimated FOB, ETA, and FN

17916.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft B-8221 + DQ-FJU + HL7626 + HL7629 + HL8502 + HP9918 + JA211P + N572UP + VN-A618 + 9V-SML + flight SIA285
Perfect NFFN - WSSS step climb parameters ... = CLS CRZ ET
Vinaka = Thank you
AGM = Miscellaneous Air/Ground Message
DFD = Digital Flight Data
TS = Time Stamp
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAK = Facilities Acknowledgement Message
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response CPDLC
FCA = Facilities Contact Advisory
FMH = Facilities Message Header = Flight Number
• Engine Cruise Report YSSY - RKSI ...
= collection of data over a period of time
in which the aircraft met the appropriate stability criteria
If no stability is detected, then the report
ends with NO STABLE FRAME CONDITION
• Aircraft in-flight performance parameters such as OIT = Oil Temperature are explained e.g. here
• The yellow table below shows a typical parameters list ...
CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

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

Codes of ACARS Message Labels can be found here

17916.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft A7-BGA + N895FD + RPC9934 + VN-A819 + flight CSN321
Message C1 is incomplete ...
DEST BURN + ALTN + RESERVE + HOLD = MIN RQD + RPF + OTHER = TKOF + TAXI = TTL FOB
AGM = Miscellaneous Air/Ground Message
ATSU = Air Traffic Service Unit
BMC = Bleed Monitoring Computer
CFB = Centralized Fault Book
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
VDR = VHF Data Radio
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

8939.0 kHz H10 HFDL Muan Air, South Korea, + aircraft B-308Y + B-6113 + HL7792 + JA932A + N642FE + RA73679 + VN-A889 + flight CSC891
AFS = Auto Flight System
CFB = Centralized Fault Book
DA = Departure Airport
DM = Time Stamp
DMC = Display Management Computer
DS = Destination Airport
DX = Dispatcher
FLR = Failure
FMGC = Flight Management and Guidance Computer
FPR = Flight Plan Route
FR = Fault Report, followed by the Date-Time Group
RTOK = Re-Test Okay
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

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

Codes of ACARS Message Labels can be found here

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

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

518.0 kHz GCC Cullercoats Radio, United Kingdom

518.0 kHz SUZ Serapeum Radio, Egypt
ADES = Advanced Energy Systems
BA = British Admiralty
GUPCO = Gulf of Suez Petroleum Company

3585.0 kHz HLL8 Soul Meteo, South Korea

6559.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft N419MC + N579UP + N609FE + N891FD + N24980 + N27959 + flight AS0299
AGM = Miscellaneous Air/Ground Message
CFD = Centralized Fault Display
DFD = Digital Flight Data
ECS = Environmental Control System
EGT = Exhaust Gas Temperature
FRM = Fault Reporting Manual
CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

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

Codes of ACARS Message Labels can be found here

16971.0 kHz JJC Kyodo Tsushin Tokyo, Japan

518.0 kHz Grindavik Radio, Iceland

13303.0 kHz H17 HFDL Telde Air, Canary Islands, + aircraft ET-ASG + G-VGBR + OD-MRL + SU-GEF + 5Y-KZH + flight UAE62T
HAAB - DIAP L/R engine settings ...
AA = Arrival Airport
DA = Departure Airport
FPN = Flight Plan Report downlink
TI2 = Terminal Information Request
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

13303.0 kHz H17 HFDL Telde Air, Canary Islands, + aircraft CN-MAY + CS-TSH + F-HTYJ + SU-GEF + SU-GEH + SU-GEI + flight MS0742
AGM = Miscellaneous Air/Ground Message
BJR = Bonjour
CDB = Commandant Du Bord
DFB = Digital Flight Book
MDPWI = Meteorological Data - Predicted Wind for FL 320
REQPWI = Predicted Wind Request for FL 320
• Engine Cruise Report LPPD - LPMA ...
= 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 ...

518.0 kHz SVK Kerkyra Radio, Greece

5655.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft A6-ATD + B-5947 + 9V-SCA + 9V-SHO + 9V-SHQ + 9V-SMB + 9V-SMD + 9V-SMJ + 9V-SMV + flight CES667
DFB = Digital Flight Book
TDZ = Touchdown Zone
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
CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

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

Codes of ACARS Message Labels can be found here

5655.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft A6-ATD + B-305X + B-326C + HS-XTH + 4R-ALS + 9V-SMB + 9V-SMJ + flight QTR961
AGM = Miscellaneous Air/Ground Message
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles

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

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

Codes of ACARS Message Labels can be found here

518.0 kHz 4XO Haifa Radio, Israel
BA = British Admiralty
NTM = Notice to Mariners

518.0 kHz 5BA Nicosia Radio, Cyprus

8791.0 kHz XSG Shanghai Radio, China
ZAN on nominal 8302.0 kHz - transmitting on a XSG SSB frequency ...
CMA = China Meteorological Administration

518.0 kHz Antalya Radio, Turkey

8942.0 kHz H07 HFDL Shannon Air, Ireland, + aircraft A4O-DG + CN-RGF + F-HRBB + G-POWK + JA17KZ + 5Y-CYB + flight SS0970
CFD = Centralized Fault Display
EPCS = Engine Propulsion Control System
FLCN = Functional Logistic Control Number
TI2 = Terminal Information Request

7795.0 kHz JMH2 Tokyo Meteo, Japan

7795.0 kHz JMH2 Tokyo Meteo, Japan

17916.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft B-5913 + B-18902 + N513DZ + 9V-SKQ + 9V-SMA + flight APJ218
REQPWI = Predicted Wind Request for FL 360
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 NMW United States Coast Guard Astoria OR, United States of America
BNM = Broadcast Notice to Mariners
LLNR = Light List Number

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

10084.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft CC-BGQ + ER00008 + PR-YYC + VH-EXZ + VH-VHD + flight CSN325
Perfect OOOI ...
Increasing solar activity - and the ionosphere going totally crazy:
PRG downlink from a LUKK - HESH flight across the Eastern Mediterranean ... via Auckland!
DT = Destination, followed by the runway number
FN = Flight Number
PRG = Flight Progress Report sent shortly
(i.e. 1 hour - 10 minutes) before arrival,
typically including destination airport followed by
estimated runway for landing, estimated FOB, ETA, and FN

The Altitude Range Change Event is triggered
when the aircraft's altitude exceeds the altitude ceiling
or floor defined in the contract by the ground system

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

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

Codes of ACARS Message Labels can be found here

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

9165.0 kHz HLL Soul Meteo, South Korea

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

10081.0 kHz H07 HFDL Shannon Air, Ireland, + aircraft D-AZAJ + G-NEOS + N628UP + flight SU0868
D-AZAJ is an Airbus A321-251NX on test flight around EDDH
later to be delivered as B-32DV to Shenzhen Airlines ...
ADC = Air Defence Clearance
AFS = Auto Flight System
CFB = Centralized Fault Book
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
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

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

8416.5 kHz NMO United States Coast Guard Honolulu, Hawaii

8416.5 kHz NMO United States Coast Guard Honolulu, Hawaii

5655.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft B-5960 + JA923A + N607UP + 9V-SGC + 9V-SMN + flight CES977
A NOTAM decoder can be found e.g. here
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
• Air and ground end systems include
(1) Datalink Application Service Element = CPDLC
(2) Aeronautical Telecommunication Network upper layers
(3) TP4 = Transport Protocol Class 4
The 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

518.0 kHz 9WW21 Miri Radio, Sarawak, Malaysia

8977.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft CN-RAM + F-HMIB + RA73297 + RA73307 + YR-WIN + 5Y-CYA + 7T-VJW + flight KNE420
The INRANGE message announces the aircraft being within VHF range of the DS
AFMS = Aircraft Fuel Management System
AIDS = Aircraft Integrated Data System
CFB = Centralized Fault Book
CFD = Centralized Fault Display
DA = Departure Airport
DAR = Data Access Recorder
DM = Time Stamp
DS = Destination Airport
ECU = Electronic Control Unit
FR = Fault Report, followed by the Date-Time Group
TPIS = Tire Pressure Indicator System
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

17958.0 kHz H10 HFDL Muan Air, South Korea, + aircraft B-326D + B-326Z + B-2038 + 9V-SCG + flight SIA242 + SJX103
PDC = Pre-Departure Clearance
CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

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

Codes of ACARS Message Labels can be found here

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

17985.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft A7-ANB + A7-ANL + CN-MAX + RA73118 + 9H-IBJ + 9V-SGD + flight AR1491
AGM = Miscellaneous Air/Ground Message
CCO = Operations Control Centre
CDP = Computer Diagnostics Program
CDT = Control Display of Traffic
DFD = Digital Flight Data
EDP = Engine Display Panel
FWS = Flight Warning System
HPP = High Pressure Pump
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

See how those AFL2130 / AFL2131 Ruscists avoid overflying Ruscist-occupied Krim
and SE Ukraine by any means, deviating 1,000+ kilometres east to the Caspian Sea!

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

8927.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-30AG + B-303A + B-323H + HS-XTG + JA811A + JA816A + JA818P + flight CSZ911
AGM = Miscellaneous Air/Ground Message
CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

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

Codes of ACARS Message Labels can be found here

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

518.0 kHz UFO Kholmsk Radio FE, Russian Federation

5655.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft VN-A619 + 9V-SCJ + 9V-SGF + 9V-SMM + 9V-SMS + flight CES286
AGM = Miscellaneous Air/Ground Message
FSM = Flight System Message
• 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

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

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

8431.0 kHz XSQ Guangzhou Radio, China
N/W = Nautical Warning
Characters in brackets denote the Latin alphabet
The four-figure groups without brackets
are Chinese ideographs
Presumably local time used here since received at 1320 UTC ...

8431.0 kHz XSQ Guangzhou Radio, China
Presumably local time used here since received at 1320 UTC ...
What those megalomaniac Communist Chinese call "Zengmu Ansha Reef"
is in fact James Shoal, recognized by the Brits in the early 19th Century
and listed on the British Admiralty Chart in the 1870s (!).
Needless to say, located a mere 83 kilometres off Bintulu in Sarawak,
BETING SERUPAI belongs perfectly to the continental shelf and EEZ of MALAYSIA,
and has never repeat NEVER been a territory of Communist "China"
that is more than 1,800 kilometres repeat
MORE THAN ONE THOUSAND EIGHT HUNDRED KILOMETRES away!
Alamak!! Tak boleh tahan lah!!!

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

6535.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft RPC8783 + RPC9930 + 9V-SCR + flight ANZ174
Settings ...
CFB = Centralized Fault Book
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
SCV = Surge Control Valve
VSC = Vacuum System Controller
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

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

4346.0 kHz NMC United States Coast Guard San Francisco CA, United States of America
NHC = National Hurricane Center

8948.0 kHz H17 HFDL Telde Air, Canary Islands, + aircraft G-NEOS + N26966 + flight UAE51P
Flight parameters EGLL - LCLK ...
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

11306.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-6331 + HL7616 + JA15VA + JA819P + VN-A889 + flight CES563
Flight parameters and enroute weather ZSPD - ZYTL ...
BSCU = Brake System Control Unit
BTMU = Brake Temperature Monitoring Unit
CFB = Centralized Fault Book
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
LGTM = Light Minus Turbulence = relatively weaker intensity
TPE = Taipei
TI2 = Terminal Information Request

4209.5 kHz XSQ Guangzhou Radio, China
STS = Severe Tropical Storm

5720.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft N847FD + N872FD + flight UAE2LT
DEST BURN + ALTN + RESERVE + HOLD = MIN RQD + RPF + OTHER = TKOF + TAXI = TTL FOB
AGM = Miscellaneous Air/Ground Message
CFR = Critical Fuel Required
CI = Consistency Index
ETP = Equitime Point
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

490.0 kHz CBP Puerto Montt Radio, Chile

490.0 kHz CBV Valparaiso Radio, Chile

5720.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft N12012 + flight FDX10
CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

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

Codes of ACARS Message Labels can be found here

5720.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft A6-XWA + CN-ROP + N12012 + TF-PPC + flight MNB412
POSREP = POS, WP, ATO, FL, next+1 WP, ETO, next+2 WP,
ETO, temperature, wind, FOB or SOG, time stamp, date, HEX serial
AGM = Miscellaneous Air/Ground Message
CCO = Operations Control Centre
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
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 airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
• DELAY is a critical procedure, designed to prevent pilots
from acting on any old CPDLC messages
that might have been delayed in the network
The most serious of such cases would be
the pilot executing a clearance that was no longer valid
The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles

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

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

Codes of ACARS Message Labels can be found here

5720.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft C-GHPV + EI-GEY + G-VRAY + LY-CIN + N128AM + flight AC0820
AA = Arrival Airport
DA = Departure Airport
DT = Destination, followed by the runway number
FN = Flight Number
REQPWI = Predicted Wind Request for FL 410 390 360
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

3067.8 kHz Digital data station

11306.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-8573 + HL7616 + N945AV + flight ANA871
AGM = Miscellaneous Air/Ground Message
RESREQ/AK = FMS downlink acknowledgement of a REQFPN uplink
TI2 = Terminal Information Request
TS = Time Stamp
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAK = Facilities Acknowledgement Message
FCA = Facilities Contact Advisory
FCO ADS = Facilities Contact ADS-C
FCO ATC = Facilities Contact CPDLC
FCP = Facilities Contact Response
FMH = Facilities Message Header = Flight Number
FPO = Facilities Current Position
FRP = Facilities Response
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

8977.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft A7-AML + G-NEOU + flight ETD351 + PUE712
Perfect CPDLC connection sequence ...
DT = Destination, followed by the runway number
FN = Flight Number
TS = Time Stamp
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAK = Facilities Acknowledgement Message
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response CPDLC
FCA = Facilities Contact Advisory
FCP = Facilities Contact Response
FMH = Facilities Message Header = Flight Number
PRG = Flight Progress Report sent shortly
(i.e. 1 hour - 10 minutes) before arrival,
typically including destination airport followed by
estimated runway for landing, estimated FOB, ETA, and FN

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

16959.8 kHz FUJ French Navy Noumea, New Caledonia

518.0 kHz UGE Arkhangelsk Radio, Russian Federation

518.0 kHz UHY Murmansk Radio, Russian Federation

518.0 kHz JGC Yokohama Radio, Japan

17919.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft OH-LWO enroute RJTT - EFHK + flight TSC327
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

9165.0 kHz HLL8 Soul Meteo, South Korea

17958.0 kHz H10 HFDL Muan Air, South Korea, + flight CAO101 + CCA433

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

21955.0 kHz H17 HFDL Telde Air, Canary Islands, + aircraft CC-BGA + EI-GEY + TF-PPC + ZS-SXM + flight ETH508
MCC = Maintenance Control Centre
ZUR = Zuidafrikaanse Radio = SAA Operations Control Jo'burg
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
• 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

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

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

4209.5 kHz XVN Nha Trang Radio, Viet Nam

4209.5 kHz XVG Hai Phong Radio, Viet Nam

6565.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft B-32CT + JA833A + N850FD + flight NCA101
AGM = Miscellaneous Air/Ground Message
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

21928.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-6009 + B-6013 + B-6173 + JA903P + VN-A511 + 5Y-KZG + flight CES992
Increasing solar activity - and the ionosphere going totally crazy:
CPDLC uplink for a HKJK - EGLL international flight ... via Guam!
PD = Profile Descent
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 B-2487 + C-GOIM + ES-SAZ + G-VLUV + VP-GCA + flight RAM209
ATSU = Air Traffic Service Unit
CFB = Centralized Fault Book
CFDS = Centralized Fault Display System
CIDS = Cabin Intercommunication Data System
DA = Departure Airport
DCDU = Datalink and Control Display Unit
DFD = Digital Flight Data
DM = Time Stamp
DS = Destination Airport
DT = Destination, followed by the runway number
EFCS = Electronic Flight Control System
EIS = Electronic Instrument System
ELAC = Elevator Aileron Computer
FLR = Failure
FN = Flight Number
FR = Fault Report, followed by the Date-Time Group
GPWC = Ground Proximity Warning Computer
LGCIU = Landing Gear Control Interface Unit
REQPWI = Predicted Wind Request for FL 390 370 340 310 and 410 390 360
RMP = Radio Management Panel
TI2 = Terminal Information Request
TS = Time Stamp
WN = Warning Number, followed by the Date-Time Group
WXR = Weather Radar
PRG = Flight Progress Report sent shortly
(i.e. 1 hour - 10 minutes) before arrival,
typically including destination airport followed by
estimated runway for landing, estimated FOB, ETA, and FN

518.0 kHz ESA Tallinn Radio, Estonia

7433.5 kHz HLL5 Soul Meteo, South Korea

13315.0 kHz H13 HFDL Santa Cruz Air, Bolivia, + aircraft N583FE + N865FD + N946AV + N13954 + OY-KAT + PR-YYH + SU-GCP + flight LAN603 + QTR24Q
Increasing solar activity - and the ionosphere going totally crazy:
ATIS uplink for a EHAM - EKCH local hop ... via Santa Cruz!
Code figures for EKCH runways braking action - see e.g. here
AFS = Auto Flight System
CFB = Centralized Fault Book
DA = Departure Airport
DM = Time Stamp
DS = Destination Airport
DT = Destination, followed by the runway number
EIU = Engine Interface Unit
ELAC = Elevator Aileron Computer
FADEC = Full Authority Digital Engine Control
FN = Flight Number
FR = Fault Report, followed by the Date-Time Group
GPWS = Ground Proximity Warning System
NAI = Nacelle Anti-Ice
PRSOV = Pressure Regulating and Shut Off Valve
REQPRG = Request Flight Progress Report
TI2 = Terminal Information Request
TS = Time Stamp
VSPT = Variable-Speed Power Turbine
WN = Warning Number, followed by the Date-Time Group
PRG = Flight Progress Report sent shortly
(i.e. 1 hour - 10 minutes) before arrival,
typically including destination airport followed by
estimated runway for landing, estimated FOB, ETA, and FN

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

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

Codes of ACARS Message Labels can be found here

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

518.0 kHz JNB Naha Radio, Okinawa Island, Japan

13324.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft JA13KZ + JA208P + N610UP + 5Y-CYA + flight APJ468
Increasing solar activity - and the ionosphere going totally crazy:
METAR uplink for a HKJK - VABB regional hop ... via Hawaii!
AGM = Miscellaneous Air/Ground Message
CFD = Centralized Fault Data
DFD = Digital Flight Data
ECS = Environmental Control 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

518.0 kHz L2G Argentinian Coast Guard Buenos Aires, Argentina

17958.0 kHz H10 HFDL Muan Air, South Korea, + aircraft B-LRO + B-307E + B-5391 + B-8495 + B-8585 + JA805A + JA829A + JA890A + flight CES618
AGM = Miscellaneous Air/Ground Message
DT = Destination, followed by the runway number
FN = Flight Number
TI2 = Terminal Information Request
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAK = Facilities Acknowledgement Message
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response CPDLC
FMH = Facilities Message Header = Flight Number
PRG = Flight Progress Report sent shortly
(i.e. 1 hour - 10 minutes) before arrival,
typically including destination airport followed by
estimated runway for landing, estimated FOB, ETA, and FN

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

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

Codes of ACARS Message Labels can be found here

5195.0 kHz DRA5 Kiel, Germany

2610.2 kHz FUO French Navy Toulon, France

8416.5 kHz VFF Canadian Coast Guard Iqaluit NUN, Canada

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

11306.0 kHz H16 HFDL Barrigada Air, Guam, + flight CCA975 + CES519

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

4209.5 kHz XVN Nha Trang Radio, Viet Nam

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

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

10081.0 kHz H07 HFDL Shannon Air, Ireland, + aircraft B-1081 enroute ZBAA - LIMC + flight ASL69B
go2MONITOR's superb Result Viewer allows easy selection of MIAM
out of hundreds of decoded messages by means of advanced filter settings ...
go2MONITOR perfectly re-assembles and decodes MIAM CORE data ...
These are often messages in Airbus' XML format

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

518.0 kHz 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

518.0 kHz JNX Kushiro Radio, Japan

518.0 kHz L2T Argentinian Coast Guard Mar del Plata, Argentina

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

518.0 kHz Vengurla Point Radio, India

518.0 kHz ICH Italian Coast Guard La Maddalena Island, Italy

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

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

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

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

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

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

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

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

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

19640.8 kHz Digital data station

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

7795.0 kHz JMH2 Tokyo Meteo, Japan

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

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

12147.8 kHz Digital data station

8977.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft B-32AL + B-32AS + B-32DM + OH-LWE enroute VHHH - EFHK
go2MONITOR's superb Result Viewer allows easy selection of MIAM
out of hundreds of decoded messages by means of advanced filter settings ...
go2MONITOR perfectly re-assembles and decodes MIAM CORE data ...
These are often messages in Airbus' XML format

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

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

518.0 kHz GNI Niton Radio, United Kingdom

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

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

8696.0 kHz CBM Magallanes Radio, Chile

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

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

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

11090.0 kHz KVM70 Honolulu Meteo, Hawaii

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

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 enroute HAAB - GABS
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

518.0 kHz Buenaventura Radio, Colombia

518.0 kHz CBM Magallanes Radio, Chile

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

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

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

518.0 kHz Fuzhou Radio, China

8424.0 kHz SVO Olympia Radio, Athens, Greece

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

518.0 kHz Gislovshammar Radio, Sweden

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

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

518.0 kHz UIB Magadan Radio FE, Russian Federation

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

16559.0 kHz XSG Shanghai Radio, China

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

17919.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-327V enroute ZSSS - ZGGG + 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 SVL Limnos Radio, Greece

13570.0 kHz HLL Soul Meteo, South Korea

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

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

8439.0 kHz PBB Dutch Navy Den Helder, Netherlands

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

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

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 3VL Kelibia Radio, Tunisia
NTM = Notice to Mariners

518.0 kHz TAH Istanbul Radio, Turkey

518.0 kHz XVT Da Nang Radio, Viet Nam

13988.5 kHz JMH4 Tokyo Meteo, Japan

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

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

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

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

3855.0 kHz DDH3 Hamburg Meteo, Germany

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

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)

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

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 ...

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

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

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

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

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

State-of-the-art digital data signals have been tested since 2013
by innovative broadcast stations such as the Voice of America ...
Here's a 6067.1 kHz MFSK-16 emission on the lower sideband
of AM station Channel 292 transmitting both sidebands
2900 Hz from the carrier frequency 6070.0 kHz
New 202^3 edition of our Perseus Frequency Database
now shows utility stations' callsigns as well!

8454.8 kHz FUG French Navy Saissac, France
New 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 26,000 (twenty six thousand!) fascinating screenshots are available on our unique Digital Data Decoder Screenshots USB Stick!