21928.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-308F + B-325F + B-18907 + HL7210 + HL8099 + JA890A + flight CES518 + UAL198
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
CFB = Centralized Fault Book
DFDR = Digital Flight Data Recorder
WN = Warning Number, followed by the Date-Time Group
• Engine Cruise Report YMML - ZUTF ...
= collection of data over a period of time
in which the aircraft met the appropriate stability criteria
If no stability is detected, then the report
ends with NO STABLE FRAME CONDITION
• Aircraft in-flight performance parameters such as OIT = Oil Temperature are explained e.g. here
• The yellow table below shows a typical parameters list ...
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

11306.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-32G2 + B-8571 + B-8579 + VT-NAC + 5Y-KCA + 9V-SGB + flight HVN440
LID = Landing Information Delivery
PDC = Pre-Departure Clearance
TTL = Time To Lose
• 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

16806.5 kHz NRV United States Coast Guard Apra Harbour, Guam
ITCZ = Inter-Tropical Convergence Zone

10084.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft B-1567 + HL8387 + N513DZ + N853GT + flight CCA828 + SIA242
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing 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-7879 + CN-NMT + HZ-NS79 + VH-EXZ + flight SIA286
Solar cycle maximum - and the ionosphere going crazy:
Warning message downlink from a GMTT - LEMD Southern Spain hop ... via Auckland!
Code figures for NZAA runways braking action - see e.g. here
ASM = Air Separation Module
CFB = Centralized Fault Book
RWYCC = Runway Condition Code
TI2 = Terminal Information Request
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
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

5293.0 kHz RMP Commonwealth of Independent States Navy Kaliningrad, Russian Federation

4259.8 kHz Digital data station

6559.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft B-32AG + B-7836 + N511DN + N528FE + N859GT + RA73673 + RPC8612 + flight CES583
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 ...
PANC runway lengths ...
PASY is an ETOPS emergency alternate airport in the Alaskan Aleutian Islands
for trans-Pacific flights ... RWY 10/28 is 3049 metres long
AGM = Miscellaneous Air/Ground Message
AOC = Airline Operations Control
ATSU = Air Traffic Service Unit
BMC = Bleed Monitoring Computer
CFB = Centralized Fault Book
ECU = Electronic Control Unit
EIU = Engine Interface Unit
FADEC = Full Authority Digital Engine Control
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
TI2 = Terminal Information Request
WN = Warning Number, followed by the Date-Time Group

6559.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft B-LXO + B-7836 + N528FE + N14016 + flight HAL872
KLAX - ZSAM L/R engine data ...
AGM = Miscellaneous Air/Ground Message
CFD = Centralized Fault Data
DFB = Digital Flight Book
• The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus data for navigational accuracy
• The Waypoint Change Event is triggered by a change
made to the Next, or the Next-plus-one waypoint
This change normally occurs due to normal waypoint sequencing by the FMS
The Next or Next-plus-one waypoint can be either an ATS waypoint or a pilot inserted waypoint
• 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

8425.5 kHz XSG Shanghai Radio, China
Presumably local time used at sign-off since received at 0850 UTC ...

10081.0 kHz H07 HFDL Shannon Air, Ireland, + aircraft A6-BLT + A6-EUK + B-2094 + EI-KDE + N581UP + RA73163 + flight AAR734
Code figures for EDDK runways braking action - see e.g. here
AFS = Auto Flight System
CFB = Centralized Fault Book
CFD = Centralized Fault Data
FLCN = Functional Logistic Control Number
FLR = Failure
FMGC = Flight Management and Guidance Computer
FR = Fault Report, followed by the Date-Time Group
MDPWI = Meteorological Data - Predicted Wind for FL 310
REQPWI = Predicted Wind Request for FL 350 330 310
RETI = Reduced Engine Taxi-In
RTOK = Re-Test Okay
RWYCC = Runway Condition Code
TI2 = Terminal Information Request
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
• The 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 GNI Niton Radio, United Kingdom

4209.5 kHz Unidentified digital data station monitored from Southeast Asia
transmitting ML23 every five minutes (i.e. NOT on time slot M!) ...
INGONE read IGNORE

5720.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft OH-LWS enroute EFHK - GCLP
go2MONITOR's superb Result Viewer allows easy selection of MIAM
out of hundreds of decoded messages by means of advanced filter settings ...
go2MONITOR perfectly re-assembles and decodes MIAM CORE data ...
These are often messages in Airbus' XML format
CMS = Cabin Management System
MIAM = Media Independent Aircraft Message
MSN = Manufacturer's Serial Number
PDU = Pilot Display Unit
RTR = Real-Time Report

5720.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft A6-EVP + EC-NSC + F-HUVB + F-WWJJ + HL8517 + N514DN + N29975 + flight UAL972
Code figures for LFPG runways braking action - see e.g. here
TLSOP = Airbus enroute report directly to Toulouse in France
CDP = Computer Diagnostics Program
DFD = Digital Flight Data
EDP = Engine Display Panel
FWS = Flight Warning System
RSCD = Runway Surface Condition
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
FCA = Facilities Contact Advisory
FMH = Facilities Message Header = Flight Number
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

518.0 kHz XSI Sanya Radio, China
MSA = Maritime Safety Administration
TS = Tropical Storm

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

518.0 kHz XVT Da Nang Radio, Viet Nam

4209.5 kHz XSQ Guangzhou Radio, China
MSA = Maritime Safety Administration
STS = Severe Tropical Storm
TS = Tropical Storm

8912.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft A7-AND + N527DN + N57016 + XA-DHM + XA-VVB + XA-VVD+ flight FX0040
Code figures for EDDM runways braking action - see e.g. here
MMMX - LEMD cruise data ...
The first group is the latitude
The second group is the longitude
and its four last figures is the time in hours and minutes
The third group is the FL
DFB = Digital Flight Book
DT = Destination
FN = Flight Number
RWYCC = Runway Condition Code
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
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

16984.0 kHz PWZ Brazilian Navy Rio de Janeiro, Brazil

16976.0 kHz PWZ Brazilian Navy Rio de Janeiro, Brazil

16976.0 kHz PWZ Brazilian Navy Rio de Janeiro, Brazil

16976.0 kHz PWZ Brazilian Navy Rio de Janeiro, Brazil

12731.0 kHz PWZ Brazilian Navy Rio de Janeiro, Brazil
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

17919.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft B-LXK + B-2025 + CC-BBE + C-FIUW + HP1723 + JA14KZ + N510DN + N606UP + flight WGN487
AGFSR = Air to Ground Flight Situation Report
CFD = Centralized Fault Data
• 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

17919.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft B-2091 + N576DZ + N606UP + N627UP + N702NK + N873FD + XA-VVB + XA-VVD + flight AAR204
RJBB - KMEM cruise data ...
The first group is the latitude
The second group is the longitude
and its four last figures is the time in hours and minutes
The third group is the FL
AGM = Miscellaneous Air/Ground Message
CFD = Centralized Fault Data
ECS = Environmental Control System
FLCN = Functional Logistic Control Number
MDPWI = Meteorological Data - Predicted Wind for FL 360 340 320
REQPWI = Predicted Wind Request for FL 380 360 340 320
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

17919.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft B-2485 + C-FRSI + N238NV + N502DN + N606UP + 9V-SJA + flight DAL196
The INRANGE message announces the aircraft being within VHF range of the DS
TI2 = Terminal Information Request
• The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus data for navigational accuracy
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

12579.0 kHz UAT Moscow Radio, Russian Federation

17958.0 kHz H10 HFDL Muan Air, South Korea, + aircraft B-305T + B-326D + B-1292 + B-8392 + B-8680 + flight CCA190 + CES221
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
AGM = Miscellaneous Air/Ground Message
TI2 = Terminal Information Request

8927.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-32CD + B-8859 + B-18917 + N625UP + XA-ADD + XA-ARU + flight CES635
MMMY - RJAA cruise data ...
The first group is the latitude
The second group is the longitude
and its four last figures is the time in hours and minutes
The third group is the FL
AGM = Miscellaneous Air/Ground Message
DFB = Digital Flight Book
TI2 = Terminal Information Request
TPEOD = Taipei Operational Department
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response
FCO ADS = Facilities Contact ADS-C
FCO ATC = Facilities Contact CPDLC
FMH = Facilities Message Header = Flight Number
FPO = Facilities Current Position
• The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus data for navigational accuracy
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

8927.0 kHz H16 HFDL Barrigada Air, Guam, + flight CES239 + CSZ972

518.0 kHz ZBM Hamilton Harbour Radio, Bermuda
CFR = Code of Federal Regulations

518.0 kHz VOK Canadian Coast Guard Cartwright NFLD, Canada

5655.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft B-MBP + B-MCL + B-5902 + F-HTYE + HS-PPU + 9V-SCD + 9V-SHJ + flight HVN194
AGM = Miscellaneous Air/Ground Message
• The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus data for navigational accuracy
• The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

5655.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft A6-XWJ + B-306Y + F-HTYE + 9V-SCD + 9V-SHO + 9V-SJA + flight CES511
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)
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response
FCA = Facilities Contact Advisory
FCO ADS = Facilities Contact ADS-C
FCO ATC = Facilities Contact CPDLC
FMH = Facilities Message Header = Flight Number
FPO = Facilities Current Position
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

8942.0 kHz H07 HFDL Shannon Air, Ireland, + aircraft B-221H + CN-RGX + G-NEOU + OE-LZF + TC-FHC + flight IBE31Z
• Engine Cruise Report EGLL - LGZA ...
= collection of data over a period of time
in which the aircraft met the appropriate stability criteria
If no stability is detected, then the report
ends with NO STABLE FRAME CONDITION
• Aircraft in-flight performance parameters such as OIT = Oil Temperature are explained e.g. here
• The yellow table below shows a typical parameters list ...
Note that in this message, however, the text is not table-formatted;
anyway, standard row identifiers such as CC C0 C1 CE ... can be easily identified after the slash ...
AGM = Miscellaneous Air/Ground Message
DFB = Digital Flight Book
JS = Jump Seat
WL = Waiting List
• DELAY is a critical procedure, designed to prevent pilots
from acting on any old CPDLC messages
that might have been delayed in the network
The most serious of such cases would be
the pilot executing a clearance that was no longer valid
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

8942.0 kHz H07 HFDL Shannon Air, Ireland, + aircraft B-221H + CN-RHB + EK-FOC + HZ-NS36 + JY-AYV + flight THY9TA
BLDV = Bleed Valve
CAI = Cowl Anti-Ice
CAS = Computed Air Speed
CFB = Centralized Fault Book
DAR = Data Access Recorder
DFB = Digital Flight Book
ECAM = Electronic Centralized Aircraft Monitoring
ECS = Environmental Control System
EGT = Exhaust Gas Temperature
EPR = Engine Pressure Ratio
FCNT = (DAR) Frame Counter
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
FWC = Flight Warning Computer
HPV = High Pressure Valve
ISFC = Indicated Specific Fuel Consumption
ISOV = Isolation Valve
N2DOT = High Pressure Shaft Acceleration
OIP = Oil Pressure
OIQ = Oil Quantity
OIT = Oil Temperature
SCR = Stable Cruise Report
TCC = Turbine Case Cooling
VSV = Vacuum Switching Valve
WAI = Wing Anti Ice
WF / PB = Fuel Flow versus Burner Pressure
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing 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 NMA United States Coast Guard Miami FL, United States of America
BNM = Broadcast Notice to Mariners
CFR = Code of Federal Regulations
GUNEX = Gunnery Exercise

13001.7 (!) kHz NMF United States Coast Guard Boston MA, United States of America

13001.7 (!) kHz NMF United States Coast Guard Boston MA, United States of America
This is yet another transmission mess of the USCG
broadcasting its SITOR-B on a strange frequency (sonagram left)
plus starting the radiofax test pattern chart at 1721 UTC (sonagram right) ...

6565.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft B-KQN + EI-MAA + HL7635 + HL7792 + N865FD + N965AM + flight CCA417
MRD = Maintenance Release Document
PD = Profile Descent
TI2 = Terminal Information Request
• The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus data for navigational accuracy
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

6565.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft N512DN + N527DN + N967AM + XA-DHM+ flight CXA830
IX should read FIX
MMMY - RJAA and MMMY - RKSI cruise data ...
The first group is the latitude
The second group is the longitude
and its four last figures is the time in hours and minutes
The third group is the FL
DFB = Digital Flight Book
PFL = Planned Flight Level
PFR = Planned Fuel Remaining
PLND = Planned Time
RDA = Route Data Assessment

518.0 kHz EAC Tarifa Radio, Spain
UAS = Unmanned Aerial System

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

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

10084.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft B-5940 + JA227P + N516DN + N633UP + 9M-XBF + flight ANA877
AGM = Miscellaneous Air/Ground Message
RDA = Route Data Assessment
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing 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-LXJ + RPC9934 + flight PAL119 + UPS81
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
CFB = Centralized Fault Book
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
• DELAY is a critical procedure, designed to prevent pilots
from acting on any old CPDLC messages
that might have been delayed in the network
The most serious of such cases would be
the pilot executing a clearance that was no longer valid
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

17919.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft N183AM + N298FE + N620UP + TC-LHD + XA-VRY + 9H-MLX + flight UPS203
The INRANGE message announces the aircraft being within VHF range of the DS
SAEZ - MMMX cruise data ...
The first group is the latitude
The second group is the longitude
and its four last figures is the time in hours and minutes
The third group is the FL
DFB = Digital Flight Book
LTAET = Less Than All Engine Taxi
RTO = Report Time Over
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

8416.5 kHz L2C Argentinian Coast Guard Buenos Aires, Argentina

10081.0 kHz H07 HFDL Shannon Air, Ireland, + aircraft D-AUSC + EI-KIA + G-EODS + HZ-NS54 + RA73180 + RA73750 + UK32020 + 9H-AOZ + flight CBJ692
RS message seems to be some approach data downlink
(heading towards UBBB)
or some non-standard ULD cargo configuration ...
AMDAR = Aircraft Meteorological Data Relay GMFB - OMAA
AP = Auto Pilot
CAM = Cabin Assignment Module
CFB = Centralized Fault Book
CIDS = Cabin Intercommunication Data System
DA = Departure Airport
DEU = Decoder-Encoder Unit
DFB = Digital Flight Book
DM = Time Stamp
DS = Destination Airport
FMA = Flight Mode Annunciator
FR = Fault Report, followed by the Date-Time Group
MCDU = Multi-Function Control Display Unit
MTC = Maintenance Technical Center
REQPWI = Predicted Wind Request for FL 380 360 340 320
ROP = Runway Overrun Protection
ROW = Runway Overrun Warning
SDCU = Smoke Detect Control Unit
SDF = Smoke Detection Function
WN = Warning Number, followed by the Date-Time Group

3585.0 kHz HLL8 Soul Meteo, South Korea

3585.0 kHz HLL8 Soul Meteo, South Korea

13570.0 kHz HLL Soul Meteo, South Korea
GloSea = Global Seasonal Forecasting System

11184.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft A6-EDK + CN-MAX + EI-KBH + EI-KGD + G-NEOT + HZ-NS37 + LY-HMD + flight BA016P
• Engine Cruise Report UACC - UATE ...
= collection of data over a period of time
in which the aircraft met the appropriate stability criteria
If no stability is detected, then the report
ends with NO STABLE FRAME CONDITION
• Aircraft in-flight performance parameters such as OIT = Oil Temperature are explained e.g. here
• The yellow table below shows a typical parameters list ...
Note that in this message, however, the text is not table-formatted;
anyway, standard row identifiers such as CC C0 C1 CE ... can be easily identified after the slash ...
AGM = Miscellaneous Air/Ground Message
CCO = Operations Control Centre
CFB = Centralized Fault Book
DFD = Digital Flight Data
FLR = Failure
FN = Flight Number
FWS = Flight Warning System
MMR = Multi-Mode Receiver
TI2 = Terminal Information Request
TLSOP = Airbus A380 enroute parameters report directly to Toulouse in France

10985.8 kHz Digital data station

13270.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft A6-EUS + B-MCG + PK-SJE + TC-LGD + flight QTR954
ACCLRM = Accelerometer
CFB = Centralized Fault Book
CIDS = Cabin Intercommunication Data System
DT = Destination
EFCS = Electronic Flight Control System
ELAC = Elevator Aileron Computer
FLR = Failure
FN = Flight Number
FR = Fault Report, followed by the Date-Time Group
TI2 = Terminal Information Request
TS = Time Stamp
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

10084.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft N514DN + N615UP + flight DAL147 + FDX15
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
FMC = Flight Management Computer
FMS = Flight Management System
• The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus data for navigational accuracy
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

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

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

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

518.0 kHz Balasore Radio, India

5514.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft B-18781 + B-18918 + C-GWUU + JA17KZ + N505DN + N582UP + N609FE + N632UP + 9V-SGD + flight CES977
KLAX - RCTP cruise data ...
The first group is the latitude
The second group is the longitude
and its four last figures is the time in hours and minutes
The third group is the FL
CFD = Centralized Fault Data
ECS = Environmental Control System
MAHALO = Thank you
TI2 = Terminal Information Request
TOC = Top of Climb
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAK = Facilities Acknowledgement Message
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response
FCA = Facilities Contact Advisory
FMH = Facilities Message Header = Flight Number
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

13351.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft B-6597 + HL7616 + PR-TYR + 9V-SMT + flight EB0218
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
POSREPs EGCC - WSSS and RKSI - PANC ...
DFB = Digital Flight Book
MIAM = Media Independent Aircraft Message
PDU = Pilot Display Unit
TI2 = Terminal Information Request
TS = Time Stamp

4209.5 kHz NRV United States Coast Guard Apra Harbour, Guam
PTWC = Pacific Tsunamic Warning Center

518.0 kHz JGC Yokohama Radio, Japan

8894.0 kHz H11 HFDL Panama City Air, Panama, + aircraft N642FE + XA-ADH + XA-VSF + XA-VVD + flight ETH500 + LRC652
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
RJAA - MMMX cruise data ...
The first group is the latitude
The second group is the longitude
and its four last figures is the time in hours and minutes
The third group is the FL
DFB = Digital Flight Book
DT = Destination
FN = Flight Number
FSM = Flight System Message
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

17928.0 kHz H17 HFDL Telde Air, Canary Islands, + aircraft EC-NOM + G-VLUV + flight VIR25B
DT = Destination
PR = Flight Progress Report
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAK = Facilities Acknowledgement Message
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response
FCA = Facilities Contact Advisory
FMH = Facilities Message Header = Flight Number
• The TP4 (= Transport Protocol Class 4) message
notifies the pilot of an ATSU identifier
• The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

13315.0 kHz H13 HFDL Santa Cruz Air, Bolivia, + aircraft N762AV + PS-AJB + flight AZU485 + CSC675
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
REQPWI = Predicted Wind Request for FL 370 350 330

15025.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft A6-XWG + B-208X + B-2098 + B-5918 + B-6090 + XA-ADD + flight UAE4PV
MMMX - LEMD and ZSPD - LFPG cruise data ...
The first group is the latitude
The second group is the longitude
and its four last figures is the time in hours and minutes
The third group is the FL
DFB = Digital Flight Book
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
GPSSU = Global Positioning System Sensor Unit
IR = Inertial Reference
MMR = Multi-Mode Receiver
PD = Profile Descent
TI2 = Terminal Information Request
VSC = Vacuum System Controller
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
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

15025.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft A6-XWG + CN-ROL + OE-LZE + flight TP69LA
TRIP + CONT5 + ALTN + FINRES + ETOPS = MFOB
AGM = Miscellaneous Air/Ground Message
AZFW = Actual Zero Fuel Weight
CCO = Operations Control Centre
CI = Consistency Index
FINRES = Final Reserve Fuel
MFOB = Minimum Fuel On Board
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response
FCA = Facilities Contact Advisory
FCO ADS = Facilities Contact ADS-C
FCO ATC = Facilities Contact CPDLC
FCP = Facilities Contact Response
FMH = Facilities Message Header = Flight Number
FPO = Facilities Current Position
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
• The TP4 (= Transport Protocol Class 4) message
notifies the pilot of an ATSU identifier
• The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

4210.5 (not 4209.5!) kHz XSQ Guangzhou Radio, China
Characters in brackets denote the Latin alphabet
The four-figure groups without brackets
are Chinese ideographs
N/W = Navigational Warning
Presumably local time used here since received at 1400 UTC ...

17958.0 kHz H10 HFDL Muan Air, South Korea, + aircraft B-32GS + B-32KV + B-6330 + B-6376 + B-8798 + JA211A + JA212A + JA829A + 9V-SHN + flight CCA273
ADCC = Aviation Data Communication Corporation
CFD = Centralized Fault Data
PDC = Pre-Departure Clearance
TI2 = Terminal Information Request
WXR = Weather 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

9982.5 kHz KVM70 Honolulu Meteo, Hawaii

15025.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft B-KQN + B-6543 + N964AM + RA73154 + TC-MCN + YR-KID + flight RAM211
Airbus' XML failure report system ...
MMMX - LIRF cruise data ...
The first group is the latitude
The second group is the longitude
and its four last figures is the time in hours and minutes
The third group is the FL
AGM = Miscellaneous Air/Ground Message
CFB = Centralized Fault Book
CMS = Cabin Management System
DFB = Digital Flight Book
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
IR = Inertial Reference
ISIS = Integrated Standby Instrument System
MMR = Multi-Mode Receiver
MSN = Manufacturer's Serial Number
RTR = Real-Time Report
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

4209.5 kHz NRV United States Coast Guard Apra Harbour, Guam
BNM = Broadcast Notice to Mariners
FMSG = Forces Micronesia Sector Guam
GU = Guam
LB = Lighted Buoy
LLNR = Light List Number
NTM = Notice to Mariners

5655.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft B-322H enroute ZGSZ - FAOR
go2MONITOR's superb Result Viewer allows easy selection of MIAM
out of hundreds of decoded messages by means of advanced filter settings ...
go2MONITOR perfectly re-assembles and decodes MIAM CORE data ...
These are often messages in Airbus' XML format
CMS = Cabin Management System
MIAM = Media Independent Aircraft Message
MSN = Manufacturer's Serial Number
PDU = Pilot Display Unit
RTR = Real-Time Report
VTS = Vacuum Toilet Service

5655.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft B-MCG + B-325F + B-8680 + VN-A870 + 9V-SMS + flight ETD801
AGM = Miscellaneous Air/Ground Message
TI2 = Terminal Information Request
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

13270.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft B-5917 + B-8605 + PK-SJF + 9V-SHO + flight CES213 + MAS160
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
DT = Destination
FN = Flight Number
TS = Time Stamp
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
• PRG = Flight Progress Report sent shortly
(i.e. 1 hour - 10 minutes) before arrival,
typically including destination airport followed by
estimated runway for landing, estimated FOB, ETA, and FN
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

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

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

15025.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft B-1430 + B-1467 + JA926A + N782AM + RA73835 + SX-VSL + flight AIC111
Fault report downlink with a delay of four days ...
ZBAA - LEMD engine data ...
MMMX - SBGR cruise data ...
The first group is the latitude
The second group is the longitude
and its four last figures is the time in hours and minutes
The third group is the FL
CFB = Centralized Fault Book
DA = Departure Airport
DFB = Digital Flight Book
DM = Time Stamp
DS = Destination Airport
FADEC = Full Authority Digital Engine Control
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

6559.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft B-LXN + B-6329 + flight AMX008 + FDX543
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
AGM = Miscellaneous Air/Ground Message
PD = Profile Descent
VA = Volcanic Ash
VAA = Volcanic Ash Advisory
VAAC = Volcanic Ash Advisory Centre

16971.0 kHz JJC Kyodo Tsushin Tokyo, Japan

16971.0 kHz JJC Kyodo Tsushin Tokyo, Japan

518.0 kHz HZH Jeddah Radio, Saudi Arabia

518.0 kHz Sellia Marina Radio, Italy
VTS = Vessel Traffic Service

518.0 kHz SUH Alexandria Radio, Egypt
BA = British Admiralty
EAMS = Egyptian Authority for Maritime Safety
This is the former PLA (Ports and Lighthouses Administration) ...

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

518.0 kHz ESA Tallinn Radio, Estonia
PET = Saint Petersburg

518.0 kHz SUK Quseir Radio, Egypt
BA = British Admiralty

518.0 kHz GPK Portpatrick Radio, United Kingdom

13270.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft A7-ALX + B-5970 + B-6382 + B-6671 + JA901P + N121FE + N502DN + S2-AHO + flight MAS160 + THY067
AGM = Miscellaneous Air/Ground Message
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response
FCA = Facilities Contact Advisory
FMH = Facilities Message Header = Flight Number
• The 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
• 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

11387.0 kHz H04 HFDL Riverhead Air NY, United States of America, + flight IBE03R

518.0 kHz Muttam Point Radio, India
IMD = India Meteorological Department
INW = Indian Navigational Warning
MSC = Mediterranean Shipping Company

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

6565.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft B-KPV + B-32AG + XA-AMR + flight UPS296
PMDY is an ETOPS emergency alternate airport
for trans-Pacific flights with RWY 6/24 = 2377 metres ...
RKSI - MMMX cruise data ...
The first group is the latitude
The second group is the longitude
and its four last figures is the time in hours and minutes
The third group is the FL
DFB = Digital Flight Book
• The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus data for navigational accuracy
• The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

518.0 kHz Don Sak Radio, Thailand
005671060 is the station's MMSI (Maritime Mobile Service Identity) code
See 5 AUG 2021 NAVTEX Panel Report

7396.9 kHz HSW64 Bangkok Meteo, Thailand

7396.9 kHz HSW64 Bangkok Meteo, Thailand

7535.0 kHz VMW Wiluna Meteo WA, Australia

7535.0 kHz VMW Wiluna Meteo WA, Australia

17958.0 kHz H10 HFDL Muan Air, South Korea, + aircraft A6-AEP + B-325J + HL7792 + N528DN + XA-VVD + flight ANA904
FMS = Flight Management System
RESPWI/RJ = FMS downlink rejection of PWI = Predicted Wind uplink data
TI2 = Terminal Information Request

13303.0 kHz H17 HFDL Telde Air, Canary Islands, + aircraft 16060S + flight GLG739
Aircraft 16060S = flight BLUE41 is United States Air Force ...
AGM = Miscellaneous Air/Ground Message
BJR = Bonjour
CCO = Operations Control Centre
CDB = Commandant Du Bord
• The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus data for navigational accuracy
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

13303.0 kHz H17 HFDL Telde Air, Canary Islands, + aircraft C-FITL + N521DN + N568DZ + N12005 + 6V-SEN + 16060S + flight ME0571
Aircraft 16060S = flight BLUE41 is United States Air Force ...
AFMS = Aircraft Fuel Management System
CI = Consistency Index
DFB = Digital Flight Book
DX = Dispatcher
ETE = Estimated Time Elapsed
ETP = Equitime Point
FLR = Failure
FMS = Flight Management System
FR = Fault Report, followed by the Date-Time Group
PFL = Planned Flight Level
PFR = Planned Fuel Remaining
RDA = Route Data Assessment
RDC = Route Data Calculation
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 TP4 (= Transport Protocol Class 4) message
notifies the pilot of an ATSU identifier
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

17919.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft B-MCD + JA902A+ N452PA + N573DZ + TC-LGS + XA-ADC + 9H-MLV + 9V-SCP + flight UAL187
LEMD - MMMX cruise data ...
The first group is the latitude
The second group is the longitude
and its four last figures is the time in hours and minutes
The third group is the FL
DFB = Digital Flight Book
DT = Destination
FN = Flight Number
• PRG = Flight Progress Report sent shortly
(i.e. 1 hour - 10 minutes) before arrival,
typically including destination airport followed by
estimated runway for landing, estimated FOB, ETA, and FN
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

4209.5 kHz XVG Hai Phong Radio, Viet Nam

4209.5 kHz XVN Nha Trang Radio, Viet Nam

16027.9 kHz NMF United States Coast Guard Boston MA, United States of America
NCEP = National Centers for Environmental Prediction

518.0 kHz IQM Mondolfo Radio, Italy

17958.0 kHz H10 HFDL Muan Air, South Korea, + aircraft B-221F + B-304E + B-325R + B-6332 + B-6756 + 9V-SMT + flight CES500
DFB = Digital Flight Book
LID = Landing Information Delivery
PB = Parking Bay
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

21949.0 kHz H08 HFDL Johannesburg Air, South Africa (Republic of), + aircraft CN-ROP + RA73099 + RA73154 + SU-GDA + SU-GEK + VP-BAK + 5Y-KYD + 5Y-KYE + flight XA054E
AGM = Miscellaneous Air/Ground Message
CCO = Operations Control Centre
DFB = Digital Flight Book

8977.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft B-5962 + RA73743 + YR-KID + 87-3601 + flight SU2137
87-3601 is a JASDF Boeing 767-2FK(ER) tanker ...
ASC = Air Service Command
CFB = Centralized Fault Book
CFDS = Centralized Fault Display System
DT = Destination
FLR = Failure
FN = Flight Number
FR = Fault Report, followed by the Date-Time Group
JASDF = Japan Air Self-Defence Force
MDDU = Multipurpose Disk Drive Unit
MMR = Multi-Mode Receiver
REQPRG = Request Flight Progress Report
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response
FMH = Facilities Message Header = Flight Number
• The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

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

8416.5 kHz VFF Canadian Coast Guard Iqaluit NUN, Canada
MCTS = Marine Communications and Traffic Services
OW = open water
WVS = World Vector Shoreline

8416.5 kHz VFF Canadian Coast Guard Iqaluit NUN, Canada
MCTS = Marine Communications and Traffic Services
OVR-OW = over open water
WVS = World Vector Shoreline

518.0 kHz 9WW21 Miri Radio, Sarawak, Malaysia
Totally outdated meteorological warnings of several months ago ...
Alamak! Tak boleh tahan lah!
First Category = Sungai Sarawak - Sungai Sadong - Sungai Lundu
Second Category = Sungai Batang Lupar
Third Category = Sungai Regang up to Brunei

518.0 kHz Sandakan Radio, Sabah, Malaysia
Warnings still in force - received 221500Z AUG 2025
NTM = Notice to Mariners

6661.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft A6-XWF + A7-ANB + B-1466 + HL8388 + N132FE + flight DLH459
• 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

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

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

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

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

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

13074.0 kHz JFC Misaki Fisheries Radio, Japan
Latest tuna market prices ...
The date reads 7 8 20 = 2025 August 20
since the Japanese calendar year in the Reiwa Era is used here
Formula: Reiwa year + 2018 = Gregorian year

8912.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft A6-XWH + UK78706 + flight VIR135
CFB = Centralized Fault Book
CMCF = Central Maintenance Computing Function
DB = Dash Board
DCA = Data Communication Architecture
EOR = End of Report
FRC = Fault Reporting Code
GPM = General Processing Module
HYDIF = Hydraulic Interface Function
INR = Integrated Navigation Receiver
NCMM = Network Channel Management Monitor
• The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus data for navigational accuracy
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

13303.0 kHz H17 HFDL Telde Air, Canary Islands, + aircraft C-GUBT + G-VEII + N523DN + flight ETH517 + UAL938
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
POSREP = POS, WP, ATO, FL, next+1 WP, ETO, next+2 WP,
ETO, temperature, wind, FOB or SOG, time stamp, date, HEX serial
FMC = Flight Management Computer
FMS = Flight Management System
REQPWI = Predicted Wind Request for FL 410 390 370 340

8885.0 kHz H15 HFDL Muhurroq Air, Bahrain, + aircraft A6-ETQ + HZ-NS28 + HZ-NS39 + HZ-NS79 + SU-GDY + 5Y-KCA + flight CBJ662
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

518.0 kHz NMQ United States Coast Guard Long Beach CA, United States of America
BNM = Broadcast Notice to Mariners
DEXO = Detonation Explosion
SD = San Diego

6220.0 kHz IDN Italian Navy Napoli, Italy

490.0 kHz SVK Kerkyra Radio, Greece

518.0 kHz XVS Ho Chi Minh City Radio, Viet Nam

4209.5 kHz XSG Shanghai Radio, China
CGCS = China Geodetic Coordinate System
MSA = Maritime Safety Administration

12579.0 kHz NMO United States Coast Guard Honolulu, Hawaii

8942.0 kHz H07 HFDL Shannon Air, Ireland, + aircraft B-32AG + B-32D2 + N631UP + 9M-MAC + flight BA04YW + QTR706
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
AGM = Miscellaneous Air/Ground Message
CFB = Centralized Fault Book
CIDS = Cabin Intercommunication Data System
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
IPCU = Ice Protection Control Unit
TDZ = Touchdown Zone
TI2 = Terminal Information Request

13988.5 kHz JMH4 Tokyo Meteo, Japan

5195.0 kHz DRA5 Kiel, Germany

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

16907.5 kHz JFA Funabashi Fisheries Radio, Japan

14467.3 kHz DDH8 Hamburg Meteo, Germany
DWD = Deutscher Wetterdienst

13074.0 kHz JFC Misaki Fisheries Radio, Japan
Japanese Coast Guard navigational warnings ...
The date reads 7 8 12 = 2025 August 12
since the Japanese calendar year in the Reiwa Era is used here
Formula: Reiwa year + 2018 = Gregorian year

13276.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft N620FE + flight UAL981
DFB = Digital Flight Book
DA = Departure Airport
DS = Destination Airport
DX = Dispatcher
EFS = Enhanced Fuel System
FPR = Flight Plan Route
TI2 = Terminal Information Request
WTB = Weight and Balance

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

11086.5 kHz GYA Royal Navy London, United Kingdom

16806.5 kHz L2C Argentinian Coast Guard Buenos Aires, Argentina

7880.0 kHz DDK3 Hamburg Meteo, Germany

7880.0 kHz DDK3 Hamburg Meteo, Germany
ICON = Icosahedral Nonhydrostatic Model

15451.8 kHz Digital data station

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

21997.0 kHz H13 HFDL Santa Cruz Air, Bolivia, + aircraft PK-GMR + PR-TYI + PR-TYN + flight GLG 163 + VIR155
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
Flybondi's LV-KEH - used for domestic hops -
continues to use the PK-GMR callsign of that Boeing 737-800
leased from UMB Bank in Kansas City MO
("United Missouri Bancshares"), United States of America
since they did not update their avionics ...
RS message seems to be some approach data downlink
(heading towards SBTE)
or some non-standard ULD cargo configuration ...
CFB = Centralized Fault Book
CCV = Centro Control Vuelos
WN = Warning Number, followed by the Date-Time Group

518.0 kHz EQI Abbas Radio, Iran

16971.0 kHz JJC Kyodo Tsushin Tokyo, Japan

21997.0 kHz H13 HFDL Santa Cruz Air, Bolivia, + aircraft 5Y-KYE + 5Y-KYF + ZS-SXJ + flight AEA042 + NK1379
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
Solar cycle maximum - and the ionosphere going crazy:
METAR uplink for a GOBD - DIAP West African hop ... via Santa Cruz!
Solar cycle maximum - and the ionosphere going crazy:
METAR uplink for a FLHN - HKJK East African hop ... via Santa Cruz!
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

8416.5 kHz NMO United States Coast Guard Honolulu, Hawaii

8416.5 kHz NMO United States Coast Guard Honolulu, Hawaii

8416.5 kHz NMO United States Coast Guard Honolulu, Hawaii

518.0 kHz EAV Valencia Radio, Spain

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

21955.0 kHz H17 HFDL Telde Air, Canary Islands, + aircraft CN-ROH + EC-OCG + EP-MMG + G-GATU + TU-TSY + flight HY9657
AGM = Miscellaneous Air/Ground Message
• Engine Cruise Report DIAP - DNAA ...
= collection of data over a period of time
in which the aircraft met the appropriate stability criteria
If no stability is detected, then the report
ends with NO STABLE FRAME CONDITION
• Aircraft in-flight performance parameters such as OIT = Oil Temperature are explained e.g. here
• The yellow table below shows a typical parameters list ...
Note that in this message, however, the text is not table-formatted;
anyway, standard row identifiers such as CC C0 C1 CE ... can be easily identified after the slash ...

12668.3 kHz FUG French Navy Saissac, France
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

17967.0 kHz H15 HFDL Muhurroq Air, Bahrain, + aircraft A6-AED + A6-EIA + A6-XWG + EI-KBG + EI-KGK + LY-HMD + TC-MCO + flight CES657 + QTR42C
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
TLSOP = XML-formatted Airbus A350 enroute failure report directly to Toulouse in France
AGM = Miscellaneous Air/Ground Message
CDP = Computer Diagnostics Program
CFB = Centralized Fault Book
DFD = Digital Flight Data
ECAM = Electronic Centralized Aircraft Monitoring
EDP = Engine Display Panel
DSPTCH = WP/ETO/FOB/FL
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
FWS = Flight Warning System
MMR = Multi-Mode Receiver
PHC = Probe Heat Computer
SDAC = System Data Acquisition Control

518.0 kHz Grindavik Radio, Iceland

7433.5 kHz HLL5 Soul Meteo, South Korea

11348.0 kHz H17 HFDL Telde Air, Canary Islands, + aircraft A7-ANJ + CN-RGB + CN-ROH + HL8389 + N628UP + flight AT960U
AGM = Miscellaneous Air/Ground Message
CCO = Operations Control Centre
• The TP4 (= Transport Protocol Class 4) message
notifies the pilot of an ATSU identifier
• The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

12412.5 kHz NOJ United States Coast Guard Kodiak, Alaska
Strange horizontal distortion despite fair signal quality ...
NCEP = National Centers for Environmental Prediction

16907.5 kHz JFA Funabashi Fisheries Radio, Japan
NOAA satellite settings for JRC / FURUNO fish finder equipment ...
The date reads 7 7 30 = 2025 July 30
since the Japanese calendar year in the Reiwa Era is used here
Formula: Reiwa year + 2018 = Gregorian year

8658.0 kHz JFX Kagoshima Fisheries Radio, Japan
The date reads 7 7 30 = 2025 July 30
since the Japanese calendar year in the Reiwa Era is used here
Formula: Reiwa year + 2018 = Gregorian year

9165.0 kHz HLL Soul Meteo, South Korea

10030.0 kHz H15 HFDL Muhurroq Air, Bahrain, + aircraft AP-BPF + A6-EIW + HZ-NS35 + HZ-NS38 + N828CA + 4R-ABT + 9N-ALM + flight NWS104 + UAE319
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
AFS = Auto Flight System
CFB = Centralized Fault Book
DA = Departure Airport
DM = Time Stamp
DS = Destination Airport
DT = Destination
EIS = Electronic Instrument System
FLR = Failure
FMGC = Flight Management and Guidance Computer
FN = Flight Number
FR = Fault Report, followed by the Date-Time Group
IR = Inertial Reference
RTOK = Re-Test Okay
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
• 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

8677.0 kHz CBV Valparaiso Radio, Chile

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

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

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

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

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

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

11090.0 kHz KVM70 Honolulu Meteo, Hawaii

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

13312.0 kHz H15 HFDL Muhurroq Air, Bahrain, + aircraft B-20A2 + ET-ASG + N118FE + S2-AJT + UK32021 + 5Y-KCB + flight QTR9C
AGM = Miscellaneous Air/Ground Message
CFB = Centralized Fault Book
CRU = Card Reader Unit
DB = Dash Board
EOR = End of Report
FDE = Fault Detection and Exclusion
FRC = Fault Reporting Code
FSM = Flight System Message
ICS = Internal Communication System
INR = Integrated Navigation Receiver
NCMM = Network Channel Management Monitor
PACK = Pressurization Air Conditioning Kit
TI2 = Terminal Information Request
WELS = Wireless Emergency Lighting System

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

4209.5 kHz XVN Nha Trang Radio, Viet Nam

4272.8 kHz FUJ French Navy Noumea, New Caledonia
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

518.0 kHz CBV Valparaiso Radio, Chile

5655.0 kHz H06 HFDL Hat Yai Air, Thailand, + flight CES857 + FX5960

12579.0 kHz UAT Moscow Radio, Russian Federation

9165.0 kHz HLL Soul Meteo, South Korea

518.0 kHz L2G Argentinian Coast Guard Buenos Aires, Argentina

518.0 kHz L2T Argentinian Coast Guard Mar del Plata, Argentina

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

5100.0 kHz VMC Charleville Meteo QLD, Australia

17916.0 kHz H13 HFDL Santa Cruz Air, Bolivia, + aircraft RA73170 + RA73718 + RA73777 + flight CES510
Solar cycle maximum - and the ionosphere going crazy:
POSREP downlinks from UUEE - UNTT Central Asian flights ... via Santa Cruz!
Solar cycle maximum - and the ionosphere going crazy:
POSREP downlinks from a UNOO - UUEE Uralski hop ... via Santa Cruz!

17916.0 kHz H13 HFDL Santa Cruz Air, Bolivia, + aircraft B-32CE + B-6335 + flight AZU446
Solar cycle maximum - and the ionosphere going crazy:
METAR uplink for a ZSPD - EGKK trans-continental flight ... via Santa Cruz!
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent

11312.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + flight AC0006

518.0 kHz 9AS Split Radio, Croatia

490.0 kHz OST Oostende Radio, Belgium

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

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

486.0 kHz XSG Shanghai Radio, China
Chinese teleprinter code after Latin alphabet header
AIZAIZAIZAIZ corresponds to NNNN
Presumably local time used here since received at 1640 UTC ...
According to this NAVAREA 11 document, XSG uses indeed
transmitter identification character Q on both 518 and 486 kHz

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

21982.0 kHz H15 HFDL Muhurroq Air, Bahrain, + aircraft EI-KGA + G-NEOU + N582UP + VT-ANE + 9V-SMK + flight AFL214
ADC = Air Defence Clearance
ADIRU = Air Data Inertial Reference Unit
CFB = Centralized Fault Book
ETO = Estimated Time of Overfly
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
LITOW = Loaded Index at TOW
LIZFW = Loaded Index at ZFW
MAC... = Mean Aerodynamic Chord ...
OCCS = Operations Control Centre Singapore
TCAS = Traffic Alert and Collision Avoidance System
• The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus data for navigational accuracy
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

13988.5 kHz JMH4 Tokyo Meteo, Japan

13988.5 kHz JMH4 Tokyo Meteo, Japan

5100.0 kHz VMC Charleville Meteo QLD, Australia
SWF = Shortwave Fadeout

5100.0 kHz VMC Charleville Meteo QLD, Australia
MSLP = Mean Sea Level Pressure

8942.0 kHz H07 HFDL Shannon Air, Ireland, + flight KQA117 + QTR9G

6646.0 kHz H09 HFDL Barrow Air, Alaska, + flight CAL021

4209.5 kHz SVH Iraklion Radio, Greece

8106.9 kHz SWA Athens Meteo, Greece

8424.0 kHz SVO Olympia Radio, Athens, Greece

4610.0 kHz GYA Royal Navy London, United Kingdom

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

518.0 kHz XYM Myeik Radio, Myanmar

518.0 kHz PKX Jakarta Radio, Indonesia

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

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 ...

11086.5 kHz GYA Royal Navy London, United Kingdom

20268.0 kHz Digital data station

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

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

518.0 kHz Gislovshammar Radio, Sweden

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

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

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

13988.5 kHz JMH4 Tokyo Meteo, Japan

9165.0 kHz HLL Soul Meteo, South Korea

9165.0 kHz HLL Soul Meteo, South Korea

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

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

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

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

6825.0 kHz French Army Mont-Valerien, France

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

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

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

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

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

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

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

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

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

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

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

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

518.0 kHz LGQ Rogaland Radio, Norway

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

11030.0 kHz VMC Charleville Meteo QLD, Australia

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

518.0 kHz L3B Argentinian Coast Guard Comodoro Rivadavia, Argentina

518.0 kHz L2N Argentinian Coast Guard Bahia Blanca, Argentina

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

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

518.0 kHz JNB Naha Radio, Okinawa Island, Japan

518.0 kHz LGP Bodoe Radio, Norway

518.0 kHz JNR Moji Radio, Japan

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

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

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

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

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

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

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

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

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

13988.5 kHz JMH4 Tokyo Meteo, Japan

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

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

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

518.0 kHz VAU Canadian Coast Guard Chebogue NS, Canada

518.0 kHz UFL Vladivostok Radio SE, Russian Federation

518.0 kHz JNX Kushiro Radio, Japan
LL = Light List

518.0 kHz Bjuroklubb Radio, Sweden
TSS = Traffic Separation Scheme

15626.0 kHz Digital data station

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

10451.8 kHz Digital data station

11030.0 kHz VMC Charleville Meteo QLD, Australia

518.0 kHz EJM Irish Coast Guard Malin Head, Ireland

9982.5 kHz KVM70 Honolulu Meteo, Hawaii

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

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

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

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

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

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

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

518.0 kHz OXF Simiutaq Radio, Greenland

518.0 kHz VCF Canadian Coast Guard Moisie QUE, Canada

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

518.0 VCO Canadian Coast Guard Port Caledonia NS, Canada

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

8439.0 kHz PBB Dutch Navy Den Helder, Netherlands

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

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

8424.0 kHz SVO Olympia Radio, Athens, Greece

490.0 kHz TAN Izmir Radio, Turkey

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

490.0 kHz TAL Antalya Radio, Turkey

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

518.0 kHz VAE Canadian Coast Guard Tofino BC, Canada

518.0 kHz EQM Bushire Radio, Iran

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

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

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

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

16953.3 kHz 6WW French Navy Dakar, Senegal

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

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

518.0 kHz Santa Marta Radio, Colombia

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

518.0 kHz UGE Arkhangelsk Radio, Russian Federation
Zaliv = Bay

518.0 kHz LZW Varna Radio, Bulgaria

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

518.0 kHz UHY Murmansk Radio, Russian Federation

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

518.0 kHz UUI Odessa Radio, Ukraine

518.0 kHz EAL Las Palmas Radio, Canary Islands

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

4209.5 kHz XVN Nha Trang Radio, Viet Nam

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

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

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

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

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

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

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

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

8454.8 kHz FUG French Navy Saissac, France
New 2025 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