4209.5 kHz XVN Nha Trang Radio, Viet Nam

8936.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft B-32G6 + B-32LT + B-2300 + B-5961 + B18919 + flight CES633
ZHSC - NZAA enroute weather data ...
DFB = Digital Flight Book
TDZ = Touchdown Zone
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

8936.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft B-32G6 + B-326K + B-6330 + B-7836 + HL8387 + N516DN + N629UP + 9V-SHT + flight SIA24
PASY is an ETOPS emergency alternate airport in the Alaskan Aleutian Islands
for trans-Pacific flights ... RWY 10/28 is 3049 metres long
REQPER = Request Performance Report
• 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the pilot executing a clearance that was no longer valid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

518.0 kHz GNI Niton Radio, United Kingdom
TSS = Traffic Separation Scheme

518.0 kHz IQM Mondolfo Radio, Italy

518.0 kHz OST Oostende Radio, Belgium
EEZ = Exclusive Economic Zone
TSS = Traffic Separation Scheme

13312.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-6918 + B-8490 + HL8099 + JA901P + TC-LGR + flight CES536 + CES878
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
LGTM = Light Minus Turbulence = relatively weaker intensity
LID = Landing Information Delivery
PDC = Pre-Departure Clearance

11306.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-MBO + B-325F + B-325J + HL8099 + JA216P + N112FE + N856FD + VT-IFR + 9M-XBE + flight CCA458
ACMS = Aircraft Condition Monitoring System
AGM = Miscellaneous Air/Ground Message
AIDS = Aircraft Integrated Data System
CFB = Centralized Fault Book
DME = Distance Measuring Equipment
FDIMU =Flight Data Interface Management Unit
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
LGTM = Light Minus Turbulence = relatively weaker intensity
OCC = Operations Control Centre
TI2 = Terminal Information Request
VSC = Vacuum System Controller
WN = Warning Number, followed by the Date-Time Group
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

11306.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft A6-ATC + B-32C3 + B-320U + B-325F + B-1566 + B-18919 + JA923A + VN-A891 + flight SIA218
The ADC number is a security clearance required for flights
operating through the ADIZs of BGD IND MYA NPL PAK
The overflight / landing permit is valid for 48 hours
ZHSC - VVTS enroute weather data ...
ADC = Air Defense Clearance
ADIZ = Air Defence Identification Zone
ADNC = Air Defence Notification Centre
CDP = Computer Diagnostics Program
CFB = Centralized Fault Book
DFB = Digital Flight Book
DFD = Digital Flight Data
EDP = Engine Display Panel
EDTO = Extended Diversion Time Operations
FWS = Flight Warning System
ROP = Runway Overrun Protection
ROW = Runway Overrun Warning
TLSOP = Airbus enroute report directly to Toulouse in France
WN = Warning Number, followed by the Date-Time Group
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

10994.8 kHz Digital data station

10084.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft B-LPU + B-222Z + B-1017 + B-2093 + HL8576 + N23994 + RA73160 + 9V-SHE + flight CSH870
Solar cycle maximum - and the ionosphere going crazy:
POSREP message downlink from a West Russian hop ... via Auckland!
RKSI - KSEA cruise data ...
The figures group after the destination is the running number
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
DFB = Digital Flight Book
IOCC = International Operations Control Center
• 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

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

12603.5 kHz SVO Olympia Radio, Athens, Greece

15025.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft B-308L + EC-NOI + N529DN + PH-TFJ + flight AFR062 + QTR005
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
Code figures for CYHZ runways braking action - see e.g. here
EDTO = Extended Diversion Time Operations
RDA = Route Data Assessment
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

17985.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft EC-OMC + EI-KGB + JY-BAC + flight SAS935
ATW = At Waypoint
CFB = Centralized Fault Book
EIU = Engine Interface Unit
FADEC = Full Authority Digital Engine Control
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
IR = Inertial Reference
MMR = Multi-Mode Receiver
• 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

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

490.0 kHz EJM Irish Coast Guard Malin Head, Ireland
SWW = Strong Wind Warning

518.0 kHz EJK Irish Coast Guard Valentia, Ireland

518.0 kHz Hamburg Meteo, Germany
NCC = National Co-Ordination Centre
TSS = Traffic Separation Scheme

13351.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft B-5961 + 9V-SHS + flight UPS37
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
TTO = Target Time Over
• Engine Cruise Report ZSHC - NZAA ...
= collection of data over a period of time
in which the aircraft met the appropriate stability criteria
If no stability is detected, then the report
ends with NO STABLE FRAME CONDITION
• Aircraft in-flight performance parameters such as OIT = Oil Temperature are explained e.g. here
• The yellow table below shows a typical parameters list ...

22462.8 kHz FUJ French Navy Noumea, New Caledonia
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

11030.0 kHz VMC Charleville Meteo QLD, Australia
SWF = Short-Wave Fadeout

10027.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft B-32G2 + B-2006 + EC-OLG + JA884A + N528DN + N863FD + flight FIN42
EC-OLG is a scheduled service NZAA - RJAA - NFFN - NZAA
by Wamos Air on wet lease for Air New Zealand ...
POSREP = POS, WP, ATO, FL, next+1 WP, ETO, next+2 WP,
ETO, temperature, wind, FOB or SOG, time stamp, date, HEX serial
The INRANGE message announces the aircraft being within VHF range of the DS
DS = Destination Airport
• DELAY is a critical procedure, designed to prevent pilots
from acting on any old CPDLC messages
that might have been delayed in the network
The most serious of such cases would be
the pilot executing a clearance that was no longer valid
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

10027.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft A7-ANR + N528DN + N863FD + flight NK2354
KOAK - PANC cruise data ...
The figures group after the destination is the running number
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
LLD = Large Lateral Deviation = 10 NM or more without ATC approval
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response
FCO ADS = Facilities Contact ADS-C
FCO ATC = Facilities Contact CPDLC
FMH = Facilities Message Header = Flight Number
FPO = Facilities Current Position
FRP = Facilities Response
• The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus data for navigational accuracy
• The Waypoint Change Event is triggered by a change
made to the Next, or the Next-plus-one waypoint
This change normally occurs due to normal waypoint sequencing by the FMS
The Next or Next-plus-one waypoint can be either an ATS waypoint or a pilot inserted waypoint
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

7795.0 kHz JMH2 Tokyo Meteo, Japan

21982.0 kHz H15 HFDL Muhurroq Air, Bahrain, + aircraft EI-KBI + EI-KDG + EI-KGA + HZ-NS28 + HZ-NS64 + HZ-NS95 + RA73144E + VT-RTE + 5Y-KCB + flight AIC113
L/R engine data UUEE - VRMM ...
CFB = Centralized Fault Book
ECAM = Electronic Centralized Aircraft Monitoring
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
PHC = Probe Heat Computer
REQPWI = Predicted Wind Request for FL 340 320
SDAC = System Data Acquisition Control
WN = Warning Number, followed by the Date-Time Group
• Engine Cruise Report XXXX - XXXX should read OETB - OEJN ...
= 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 ...

518.0 kHz Cape Columbine Radio, South Africa (Republic of)
Warnings still in force - received 010320Z FEB 2026
CNW = Coastal Navigational Warning
SAN = South African Navy

518.0 kHz ZSQ Port Elizabeth Radio, South Africa (Republic of)
Warnings still in force - received 010120Z FEB 2026
SAN = South African Navy

518.0 kHz ZSD Durban Radio, South Africa (Republic of)
ZSJ has been ZAN for many years now ...
SAN = South African Navy
SAWS = South African Weather Service

Severe Tropical Storm Fytia ...

6565.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft B-30CX + B-2089 + N26960 + VN-A893 + flight TAI567
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
L/R engine parameters ...
BSM = Brake System Monitoring
DFD = Digital Flight Data
TI2 = Terminal Information Request
• 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

12577.0 (not 12579.0!) kHz L2C Argentinian Coast Guard Buenos Aires, Argentina
This frequency is allocated to worldwide distress and safety transmissions
and must not be used for NBDPT MSI broadcasts!

13074.0 kHz JFC Misaki Fisheries Radio, Japan
The date reads 8 1 31 = 2026 January 31
since the traditional Japanese calendar year in the Reiwa Era is used here
Formula: Reiwa year + 2018 = Gregorian year

4822.3 kHz Digital data station

15025.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft A7-AOG + CN-ROL + F-HUVP + N880FD + flight FDX2
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
FMH = Facilities Message Header = Flight Number
• The TP4 (= Transport Protocol Class 4) message
notifies the pilot of an ATSU identifier
• The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus data for navigational accuracy
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

12579.0 kHz NRV United States Coast Guard Apra Harbour, Guam
ITCZ = Inter-Tropical Convergence Zone

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

518.0 kHz Sandakan Radio, Sabah, Malaysia
Warnings still in force - received 301500Z JAN 2026
NTM = Notice to Mariners
SNP = Siakap North-Petai

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

3585.0 kHz HLL8 Soul Meteo, South Korea

8942.0 kHz H07 HFDL Shannon Air, Ireland, + aircraft A6-EUS + EI-KGH + 5Y-CYA + flight ETH575 + MCLD72
CFB = Centralized Fault Book
CIDS = Cabin Intercommunication Data System
DEU = Decoder-Encoder Unit
SDU = Satellite Data Unit
• 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

5310.0 kHz Digital data station

4209.5 kHz XVN Nha Trang Radio, Viet Nam
Local time used here since received at 1600 UTC ...

21955.0 kHz H17 HFDL Telde Air, Canary Islands, + aircraft ET-BCD + HZ-NS78 + SU-GEA + SU-GEE + flight CSH870 + KAL925
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
Code figures for LIRF runways braking action - see e.g. here
POSREP = POS, WP, ATO, FL, next+1 WP, ETO, next+2 WP,
ETO, temperature, wind, FOB or SOG, time stamp, date, HEX serial
CDP = Computer Diagnostics Program
DFD = Digital Flight Data
EDP = Engine Display Panel
FWS = Flight Warning System
TDZ = Touchdown Zone
TI2 = Terminal Information Request
TLSOP = Airbus enroute report directly to Toulouse in France

10084.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft B-304N + B-1242 + B-1469 + B-18905 + HZ-NS67 + 9V-SMR + flight LAN800
Solar cycle maximum - and the ionosphere going crazy:
OPNORM message downlink from a Gulf of Oman hop ... via Auckland!
L/R engine parameters ...
DFB = Digital Flight Book
• DELAY is a critical procedure, designed to prevent pilots
from acting on any old CPDLC messages
that might have been delayed in the network
The most serious of such cases would be
the pilot executing a clearance that was no longer valid
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing 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-32G6 + B-301D + B-18917 + VN-A898 + 9V-SCH + flight UPS33
The ADC number is a security clearance required for flights
operating through the ADIZs of BGD IND MYA NPL PAK
The overflight / landing permit is valid for 48 hours
ADC = Air Defense Clearance
ADIZ = Air Defence Identification Zone
ADNC = Air Defence Notification Centre
CDP = Computer Diagnostics Program
DFD = Digital Flight Data
EDP = Engine Display Panel
FWS = Flight Warning System
TLSOP = Airbus enroute report directly to Toulouse in France
TPEOD = Taipei Operational Department
• 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

4210.0 (not 4209.5!) kHz L2C Argentinian Coast Guard Buenos Aires, Argentina
SHN = Servicio de Hidrografia Naval

8936.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft N530DN enroute RKSI - KDTW + RPC9935
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
FMC = Flight Management Computer
FMS = Flight Management System
MIAM = Media Independent Aircraft Message
PDU = Pilot Display Unit
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing 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

8936.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft OH-LWR enroute KLAX - 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
L/R engine parameters ...
CDP = Computer Diagnostics Program
EDP = Engine Display Panel
FWS = Flight Warning System
MIAM = Media Independent Aircraft Message
PDU = Pilot Display Unit

13276.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft B-32G6 + HL8387 + N411AV + N15969 + XA-VVD + flight THY8MT
REQPWI = Predicted Wind Request for FL 390 370 350 330
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response
FCA = Facilities Contact Advisory
FMH = Facilities Message Header = Flight Number
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
• The 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

13276.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft A7-ANA + N879HD + XA-VRX + flight BOE845 + WN1813
A Boeing Company flight from KPAE
probably for test flights at KMWH
= Space Shuttle alternate with runway 14L/32R reaching 4116 metres ...
• 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

12858.8 kHz FUE French Navy Brest, France

8416.5 kHz UAT Moscow Radio, Russian Federation

8416.5 kHz UAT Moscow Radio, Russian Federation

10084.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft B-2487 + B-7369 + RA73198 + flight ANA854
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
Solar cycle maximum - and the ionosphere going crazy:
POSREP and fault report downlink from a Central Asian hop ... via Auckland!
CFB = Centralized Fault Book
CIDS = Cabin Intercommunication Data System
DEU = Decoder-Encoder Unit
DT = Destination
FLR = Failure
FN = Flight Number
FR = Fault Report, followed by the Date-Time Group
• PRG = Flight Progress Report sent shortly
(i.e. 1 hour - 10 minutes) before arrival,
typically including destination airport followed by
estimated runway for landing, estimated FOB, ETA, and FN

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

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

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

21949.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft B-32AW + B-32NH + B-308P + B-6011 + B-6771 + N632UP + 9V-SHA + flight AAR742 + SIA606
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
EDTO = Extended Diversion Time Operations
REQPRG = Request Flight Progress Report

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

5069.8 kHz Digital data station

6535.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft B-MBT + HS-TEW + HS-XTR + RPC8612 + 9M-XBG + 9V-SKZ + 9V-SMS + flight CCA970
AGM = Miscellaneous Air/Ground Message
ATSU = Air Traffic Service Unit
BMC = Bleed Monitoring Computer
CFB = Centralized Fault Book
DT = Destination
ECU = Electronic Control Unit
EIU = Engine Interface Unit
FADEC = Full Authority Digital Engine Control
FLR = Failure
FN = Flight Number
FR = Fault Report, followed by the Date-Time Group
MDDU = Multipurpose Disk Drive Unit
PSCU = Proximity Switch Control Unit
TS = Time Stamp
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

11306.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-KPE + B-30A6 + B-32D1 + B-306F + B-1638 + JA205P + JA894A + flight CSC311
AGM = Miscellaneous Air/Ground Message
APR = Automatic Position Report: Version - Flight Number - Time Stamp -
Departure Airport - Destination Airport - Position - Altitude - FOB
LGTM = Light Minus Turbulence = relatively weaker intensity
LGTP = Light Plus Turbulence = relatively greater intensity
LID = Landing Information Delivery
PDC = Pre-Departure Clearance

13351.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft B-8865 + EC-OLG + JA211A + flight VOI396
Climbing out of YMML ...
EC-OLG is a scheduled service NZAA - RJAA - NFFN - NZAA
by Wamos Air on wet lease for Air New Zealand ...
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
CIDS = Cabin Intercommunication Data System
DEU = Decoder-Encoder Unit
DFB = Digital Flight Book
DSP = Flight Operations Control
FHS = Flight Hour Services
FLAS = Flight Level Allocation Scheme
FLOS = Flight Level Orientation Scheme
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
WN = Warning Number, followed by the Date-Time Group
• The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus data for navigational accuracy
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

11030.0 kHz VMC Charleville Meteo QLD, Australia

11030.0 kHz VMC Charleville Meteo QLD, Australia

13920.0 kHz VMC Charleville Meteo QLD, Australia
MSLP = Mean Sea Level Pressure
TC = Tropical Cyclone

13312.0 kHz H15 HFDL Muhurroq Air, Bahrain, + aircraft B-30A9 + B-32GY + CN-RHE + 5Y-KCA + flight ABY148
AGM = Miscellaneous Air/Ground Message
CCO = Operations Control Centre
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
POX = Position Report
TI2 = Terminal Information Request
• Engine Cruise Report VOMM - ZHCC ...
= 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

11281.8 kHz Digital data station

16990.3 kHz Digital data station
CK018 = 18 groups
0124 0757 = date-time group
Chinese telegraph code ...

8942.0 kHz H07 HFDL Shannon Air, Ireland, + aircraft AP-BPF + B-2082 + HZ-NS65 + SU-GEN + flight QTR5K
Perfect OOOI ...
CFB = Centralized Fault Book
DA = Departure Airport
DM = Time Stamp
DS = Destination Airport
FR = Fault Report, followed by the Date-Time Group
MMR = Multi-Mode Receiver
POX = Position Report
WN = Warning Number, followed by the Date-Time Group

518.0 kHz Grimeton Radio, Sweden
GNSS = Global Navigation Satellite System
TSS = Traffic Separation Scheme

518.0 kHz ESA Tallinn Radio, Estonia

6535.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft A6-EVO + HS-XTH + JA822A + JA875A + 9V-SGE + 9V-SJG + 9V-SMF + 9V-SMZ + flight SIA437
BMC = Bleed Monitoring Computer
CFB = Centralized Fault Book
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
HP = High-Pressure
OCC = Operations Control Centre
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response
FMH = Facilities Message Header = Flight Number
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
• The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

518.0 kHz XSI Sanya Radio, China
Warnings still in force - received 231800Z JAN 2026

518.0 kHz XVT Da Nang Radio, Viet Nam

21934.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft C-FJCS + JA875A + N966AM + RPC8786 + XA-VRX + XA-VRY + XA-VSF + flight FDX979
MMMX - SCEL cruise data ...
The figures group after the destination is the running number
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
CI = Consistency Index
DFB = Digital Flight Book
TOM = Take-Off Mass
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

22527.0 kHz NMC United States Coast Guard San Francisco CA, United States of America
NCEP = National Centers for Environmental Prediction
OPC = Ocean Prediction Center

22527.0 kHz NMC United States Coast Guard San Francisco CA, United States of America
NCEP = National Centers for Environmental Prediction

8927.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-MBT + B-32C8 + B-327R + B-2006 + B-5952 + RPC8786 + RPC9935 + VN-A896 + flight SU1300
AGM = Miscellaneous Air/Ground Message
CFB = Centralized Fault Book
TDZ = Touchdown Zone
TI2 = Terminal Information Request
WN = Warning Number, followed by the Date-Time Group
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response
FCA = Facilities Contact Advisory
FMH = Facilities Message Header = Flight Number
• 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

17919.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft B-18918 + HL8522 + JA202P + JA228P + JA832A + XA-VVD + 9H-MLV + flight UPS80
PACD is an ETOPS emergency alternate airport
for trans-Pacific flights with RWY 15/33 = 3103 metres ...
AGM = Miscellaneous Air/Ground Message
AI = Arrival Information
DI = Departure Information
GC = Ground Connections
OCC = Operations Control Centre
TPEOD = Taipei Operational Department

13276.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft B-227K + B-18918 + N531DN + flight DAL65
BURN + ALTN + 10 PCT + RESV + CONT = EST
CI = Consistency Index
ETE = Estimated Time Elapsed
ETP = Equitime Point
FMS = Flight Management System
PB = Parking Bay
PFL = Planned Flight Level
PFR = Planned Fuel Remaining
RDA = Route Data Assessment
RDC = Route Data Calculation
TP = Turbulence Plot, followed by the region (e.g. HI) and running number

10027.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft B-30FN + B-32E0 + B-305X + B-18918 + flight FBU80G
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing 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 9HD Valetta R, Malta
NTM = Notice to Mariners
VTS = Vessel Traffic Service

518.0 kHz LZW Varna Radio, Bulgaria
TSS = Traffic Separation Scheme

518.0 kHz JNL Otaru Radio, Japan
LL = Light List

13270.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft B-32CG + B-32J2 + B-302Z + N571DZ + N846FD + flight CES541 + QTR954
PHNL - KOAK cruise data ...
The figures group after the destination is the running number
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

17919.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft C-FIVR + N576DZ + flight KAL233
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
IFE = In-Flight Entertainment
MTC = Maintenance Technical Center
TP = Turbulence Plot, followed by the region (e.g. HI) and running number

13324.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + aircraft B-221S + B-305X + JA902P + UK32112 + 5Y-CYA + flight DAL170
Solar cycle maximum - and the ionosphere going crazy:
Gate and METAR uplink for a FVFA - HKJK East African hop ... via Hawaii!
AOC = Airline Operations Control
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

8948.0 kHz H17 HFDL Telde Air, Canary Islands, + aircraft CN-RHA + CN-ROH + N880FD + N965AM + N12020 + PR-TYV + flight AT1410
Crew names and personnel numbers ...
KMEM - EBLG cruise data ...
The figures group after the destination is the running number
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
AA = Arrival Airport
DA = Departure Airport
LLD = Large Lateral Deviation = 10 NM or more without ATC approval
PF = Pilot Flying
PM = Pilot Monitoring
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response
FCA = Facilities Contact Advisory
FCO ADS = Facilities Contact ADS-C
FCO ATC = Facilities Contact CPDLC
FMH = Facilities Message Header = Flight Number
FPO = Facilities Current Position
• The 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

10081.0 kHz H07 HFDL Shannon Air, Ireland, + aircraft RA73780 + SX-VSL + UK32105 + flight HY0605
• Engine Cruise Report LGAV - LOWW ...
= 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 ...

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

10555.0 kHz VMW Wiluna Meteo WA, Australia

11306.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-302T + DQ-FJT + JA203P + JA879A + flight CES224
AGM = Miscellaneous Air/Ground Message
EEP = ETOPS Entry Point
OMC = Operations Management Center
TDZ = Touchdown Zone
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

10084.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft VN-A889 enroute VVNB - 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

10084.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft B-325F + HL8704 + JA203P + flight HY9674 + UAE4CK
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:
Performance data downlink from an aircraft over Iraq ... via Auckland!
AGM = Miscellaneous Air/Ground Message
LGTP = Light Plus Turbulence = relatively greater intensity
TI2 = Terminal Information Request

518.0 kHz HZH Jeddah Radio, Saudi Arabia
Warnings still in force - received 171710Z JAN 2026

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

13276.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft HP1530 + N569DZ + N965AV + flight ETH508
Code figures for CYUL runways braking action - see e.g. here
CRFI = Canadian Runway Friction Index
JS = Jump Seat
RSC = Runway Surface Condition
TI2 = Terminal Information Request

518.0 kHz VAU Canadian Coast Guard Chebogue NS, Canada
PTH-FG = Fog Banks

518.0 kHz VCO Canadian Coast Guard Port Caledonia NS, Canada
PTH-FG = Fog Banks

518.0 kHz NMN United States Coast Guard Norfolk VA, United States of America
BNM = Broadcast Notice to Mariners
LB = Lighted Buoy
LLNR = Light List Number

6661.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft A9C-FH + CN-RHB + N526DN + N964AM + XA-ADD + flight UAL114
Riding on the North Atlantic Jet Stream towards Bermuda
at 589 knots = 1091 kilometres per hour ...
L/R engine parameters and avionics settings ...
MMMX - EGLL and KJFK - OBBI cruise data ...
The figures group after the destination is the running number
The first group is the latitude
The second group is the longitude
and its four last figures is the time in hours and minutes
The third group is the FL
BSM = Brake System Monitoring
DFB = Digital Flight Book
MTC = Maintenance Technical Center
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
FRP = Facilities Response
• The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus data for navigational accuracy
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

13312.0 kHz H15 HFDL Muhurroq Air, Bahrain, + aircraft RA73715 + RA73824 + SU-GCP + SU-GCS + flight KNE716
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
FR = Fault Report, followed by the Date-Time Group
GPSSU = Global Positioning System Sensor Unit
IR = Inertial Reference
MMR = Multi-Mode Receiver
REQPWI = Predicted Wind Request for FL 320
RMP = Radio Management Panel

518.0 kHz JNR Moji Radio, Japan

518.0 kHz JNB Naha Radio, Okinawa Island, Japan

13270.0 kHz H06 HFDL Hat Yai Air, Thailand, + flight AIC201

16826.3 kHz XSQ Guangzhou Radio, China
CMA = China Meteorological Administration

6652.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft A6-LRJ + B-LIF + B-32AG + B-1266 + JA820P + N629UP + VN-A879 + flight UAE7DK + UPS0062
AGM = Miscellaneous Air/Ground Message
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
FCA = Facilities Contact Advisory
FMH = Facilities Message Header = Flight Number
FRP = Facilities Response
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

3585.0 kHz HLL8 Soul Meteo, South Korea

3585.0 kHz HLL8 Soul Meteo, South Korea

3585.0 kHz HLL8 Soul Meteo, South Korea

3585.0 kHz HLL8 Soul Meteo, South Korea

16806.5 kHz NMF United States Coast Guard Boston MA, United States of America
Broadcast of 11 days before ???

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

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

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

518.0 kHz Parangipettai Radio, India
IMD = India Meteorological Department

8912.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft EC-NBO + LV-KAO + flight AMX011
CFB = Centralized Fault Book
ECU = Electronic Control Unit
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
IDG = Integrated Drive Generator
REQPWI = Predicted Wind Request for FL 410 390 380 370
WN = Warning Number, followed by the Date-Time Group

8912.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft EC-NBO + N985NK + XA-DHN + flight AMX058 + FDX194
Riding on the North Atlantic Jet Stream
at 551 knots = 1021 kilometres per hour ...
POSREP = POS, WP, ATO, FL, next+1 WP, ETO, next+2 WP,
ETO, temperature, wind, FOB or SOG, time stamp, date, HEX serial
MMMY - RJAA cruise data ...
The figures group after the destination is the running number
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
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing 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 8 1 13 = 2026 January 13
since the traditional 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 8 1 13 = 2026 January 13
since the traditional Japanese calendar year in the Reiwa Era is used here
Formula: Reiwa year + 2018 = Gregorian year

6535.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft A6-EEL + B-32G6 + B-5946 + VN-A871 + VN-A889 + 9V-SHS + flight CCA975
Code figures for CYYR and VOBL runways braking action - see e.g. here
CFB = Centralized Fault Book
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
RSC = Runway Surface Condition
TI2 = Terminal Information Request
VSC = Vacuum System Controller
• The TP4 (= Transport Protocol Class 4) message
notifies the pilot of an ATSU identifier
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

518.0 kHz 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!!!

12711.0 kHz PWZ Brazilian Navy Rio de Janeiro, Brazil

7880.0 kHz DDK3 Hamburg Meteo, Germany

7880.0 kHz DDK3 Hamburg Meteo, Germany

17928.0 kHz H17 HFDL Telde Air, Canary Islands, + aircraft CN-ROH + CS-TSG + EC-NOM + ET-BCE + JY-AYR + SU-GEK + flight DP0338
Code figures for LPMA runways braking action - see e.g. here
AGM = Miscellaneous Air/Ground Message
CCO = Operations Control Centre
CDP = Computer Diagnostics Program
DFD = Digital Flight Data
EDP = Engine Display Panel
FWS = Flight Warning System
PIC = Pilot In Command
TDZ = Touchdown Zone
TI2 = Terminal Information Request
TLSOP = Airbus enroute report directly to Toulouse in France

13276.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft HL7624 + N939AV + RPC8934 + XA-VRX + flight TAI368
ZFW + TOF = TOW - TIF = LAW + UNDLD = MAX
Code figures for CYYZ runways braking action - see e.g. here
AGM = Miscellaneous Air/Ground Message
DOI = Dry Operating Index
RSC = Runway Surface Condition
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

5195.0 kHz DRA5 Kiel, Germany

4209.5 kHz XVN Nha Trang Radio, Viet Nam

4209.5 kHz XVG Hai Phong Radio, Viet Nam

7795.0 kHz JMH2 Tokyo Meteo, Japan

7795.0 kHz JMH2 Tokyo Meteo, Japan

8948.0 kHz H17 HFDL Telde Air, Canary Islands, + aircraft PR-TYL + flight ETH950
AA = Arrival Airport
BOF = Burn-Off Fuel
CI = Cost Index
DA = Departure Airport
FMS = Flight Management System
FPN = Flight Plan Report downlink
MDPWI = Meteorological Data - Predicted Wind for FL 390 340 300
OFP = Operational Flight Plan
REQPWI = Predicted Wind Request for FL 380 360 340 320
RESPWI/AC = FMS downlink acceptance and insertion of PWI = Predicted Wind uplink data
RESPWI/AK = FMS downlink acknowledgement of PWI = Predicted Wind uplink data

8942.0 kHz H07 HFDL Shannon Air, Ireland, + aircraft A6-EIP + EC-OND + F-HETE + OH-LWE + flight AIC995
ACN = Aircraft Classification Number
FMS = Flight Management System
HCC = Hub Control Center
MCC = Maintenance Control Center
PCN = Pavement Classification Number
RESREQ/AK = FMS downlink acknowledgement of a REQFPN uplink
TS = Time Stamp

12056.0 kHz Digital data station

11086.5 kHz GYA Royal Navy London, United Kingdom

10084.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft B-32G6 + N453PA + 9V-SMH + flight ANA127 + CSN302
CFD = Centralized Fault Data
ECS = Environmental Control 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

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

4298.0 kHz NOJ United States Coast Guard Kodiak, Alaska
Strange horizontal distortion despite fair signal quality ...
NCEP = National Centers for Environmental Prediction

6661.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft HL8704 + HP1530 + N899FD + flight AVA522
BURN + ALTN + RESERVE + CONT = MIN + RPF + OTHER = TKOF
Code figures for PANC runways braking action - see e.g. here
KIND - PANC and RJAA - MMMX cruise data ...
The figures group after the destination is the running number
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
CI = Consistency Index
GOCC = Global Operations Control Center
LLD = Large Lateral Deviation = 10 NM or more without ATC approval
MFWF = Minimum Flight Weight Fuel
RPF = Reliability Protection Fuel
TI2 = Terminal Information Request
TOCO = Take-Off Computation
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response
FCO ADS = Facilities Contact ADS-C
FCO ATC = Facilities Contact CPDLC
FMH = Facilities Message Header = Flight Number
FPO = Facilities Current Position
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

6661.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft HP1530 + flight FDX142 + NK0837
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
HCC = Hub Control Center
MX = Maintenance

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

6619.0 kHz H10 HFDL Muan Air, South Korea, + aircraft B-325F + HS-XTH + JA806A + flight CSC835
CFB = Centralized Fault Book
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

6619.0 kHz H10 HFDL Muan Air, South Korea, + aircraft B-20CJ + B-20E8 + B-32F8 + B-32G6 + B-325F + B-2412 + B-58507 + HL7610 + HL7794 + JA892A + N104FE + flight FX6067
CFD = Centralized Fault Data
DFD = Digital Flight Data
PD = Profile Descent
POX = Position Report
TI2 = Terminal Information Request
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

6619.0 kHz H10 HFDL Muan Air, South Korea, + flight CCA975 + GTI654

11086.5 kHz GYA Royal Navy London, United Kingdom

17985.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft B-5938 + EI-KDG + N583UP + TC-LBD + VN-A890 + flight MAU15
TLSOP = Airbus enroute report directly to Toulouse in France
CDP = Computer Diagnostics Program
CFB = Centralized Fault Book
DFD = Digital Flight Data
EDP = Engine Display Panel
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
FWS = Flight Warning System
MMR = Multi-Mode Receiver
WN = Warning Number, followed by the Date-Time Group

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

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

17985.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft B-308P + CN-RGI + OE-LZC + RA73155 + flight KAL951 + VIR401
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
Airbus' XML failure report system - but the Russians don't have MIAM ...
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
CFB = Centralized Fault Book
CSBS = Controllable Sunlight Blocking System
DEU = Decoder-Encoder Unit
FAP = Flight Attendant Panel
RTR = Real-Time 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
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

11387.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft F-HUVT + HC-CSF + N453PA + N948AV + 1502 + flight UZB102
Aircraft 0502 = flight "LH0854" is in fact a German Air Force 15+02 Airbus A319-100 ACJ
enroute LPPD - KNQX ... to meet Ze Boss near Key West FL?
CFD = Centralized Fault Data
DT = Destination
ECS = Environmental Control System
FN = Flight Number
TS = Time Stamp
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FCO ADS = Facilities Contact ADS-C
FCO ATC = Facilities Contact CPDLC
FMH = Facilities Message Header = Flight Number
FPO = Facilities Current Position
• Engine Cruise Report SEGU - SEQM ...
= 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 ...
• 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

16850.3 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 ...

490.0 kHz TAN Izmir Radio, Turkey

490.0 kHz Sellia Marina Radio, Italy
CLV = Cable Lay Vessel
EF = Elenco Fari = Light List Number

490.0 kHz UWT Taganrog Radio, Russian Federation
ROSHYDROMET = Russian Federal Service for Hydrometeorology and Environmental Monitoring

490.0 kHz 9AS Split Radio, Croatia
PMC = Port Meteorological Centre

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

6535.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft B-32LD + B-221W + B-6753 + ET-AOT + HL7794 + 9V-SHE + 9V-SHF + 9V-SHG + flight CES535
ETO = Estimated Time of Overfly
TI2 = Terminal Information Request
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

8912.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft CN-RGB + F-HUVM + HL8388 + flight PAL119
CFB = Centralized Fault Book
DB = Dash Board
EOR = End of Report
FDE = Fault Detection and Exclusion
FRC = Fault Reporting Code
• 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

6535.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft B-209X + B-2420 + VN-A898 + 9V-SCY + 9V-SGC + 9V-SHF + 9V-SJD + 9V-SKW + 9V-SMB + 9V-SMD + 9V-SMU + flight AIC238
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
FMH = Facilities Message Header = Flight Number
• The TP4 (= Transport Protocol Class 4) message
notifies the pilot of an ATSU identifier
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

6535.0 kHz H06 HFDL Hat Yai Air, Thailand, + aircraft B-LNV + B-MBU + B-30ES + B-307Z + HL8714 + JA874A + VN-A898 + 9V-SGC + flight HVN972 + SIA505
L/R engine parameters ...
AGM = Miscellaneous Air/Ground Message
DFB = Digital Flight Book
DT = Destination
FN = Flight Number
FSM = Flight System Message
TI2 = Terminal Information Request
TS = Time Stamp
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
• The Basic or Periodic Report gives position - trajectory intent - speed vector data
plus data for navigational accuracy
• PRG = Flight Progress Report sent shortly
(i.e. 1 hour - 10 minutes) before arrival,
typically including destination airport followed by
estimated runway for landing, estimated FOB, ETA, and FN
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

518.0 kHz XVS Ho Chi Minh City Radio, Viet Nam
Warnings still in force - received 041550Z JAN 2026

518.0 kHz Don Sak Radio, Thailand
Warnings still in force - received 041420Z JAN 2026
See 5 AUG 2021 NAVTEX Panel Report

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

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

8942.0 kHz H07 HFDL Shannon Air, Ireland, + aircraft B-1242 + CN-MAY + HZ-NS38 + HZ-NS52 + OO-JDL + SE-DMR + SU-GEA + SU-SKE + flight RAM249
AGM = Miscellaneous Air/Ground Message
CCO = Operations Control Centre
GFA = Graphic Forecast Area
• 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

2610.2 kHz FUO French Navy Toulon, France

10001.8 kHz IDR Italian Navy Rome, Italy

8912.0 kHz H04 HFDL Riverhead Air NY, United States of America, + aircraft JY-BAH + N128AM + TC-MCZ + XA-DHN + flight AFR30K
L/R engine parameters and avionics settings ...
MMMX - LEMD cruise data ...
The figures group after the destination is the running number
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
BSM = Brake System Monitoring
DFB = Digital Flight Book
• Engine Cruise Report ...
= 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 ...

8106.9 kHz SWA Athens Meteo, Greece

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

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

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

13276.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft EC-OLG + N520DN + flight FDX802
EC-OLG is a scheduled service NZAA - RJAA - NFFN - NZAA
by Wamos Air on wet lease for Air New Zealand ...
FMS = Flight Management System
RDA = Route Data Assessment
REQFPN = FPL report request uplink
RESREQ/AK = FMS downlink acknowledgement of a REQFPN uplink
TP = Turbulence Plot, followed by the region (e.g. HI) and running number

13276.0 kHz H01 HFDL San Francisco Air CA, United States of America, + aircraft HS-TEW + N520DN + N966AM + N15969 + XA-ADG + flight DAL189
Solar cycle maximum - and the ionosphere going crazy:
CPDLC uplink messages for a VTBS - VOMM Bay of Bengal flight ... via San Francisco!
BURN + ALTN + 10 PCT + RESV = MIN + CONT/DLA = EST
MMMY - RJAA + MMMY - RKSI cruise data ...
The figures group after the destination is the running number
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
CI = Consistency Index
DFB = Digital Flight Book
FMS = Flight Management System
PFL = Planned Flight Level
PFR = Planned Fuel Remaining
RDA = Route Data Assessment
RDC = Route Data Calculation
• 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

12786.0 kHz NMC United States Coast Guard San Francisco CA, United States of America
NCEP = National Centers for Environmental Prediction
NHC = National Hurricane Center
OPC = Ocean Prediction Center
WPC = Weather Prediction Center

11306.0 kHz H16 HFDL Barrigada Air, Guam, + flight DAL38

10084.0 kHz H05 HFDL Auckland Air, New Zealand, + aircraft B-209D + HL7741 + N511DN + RA73677 + flight KN5806
Code figures for RCTP runways braking action - see e.g. here
CFB = Centralized Fault Book
DA = Departure Airport
DM = Time Stamp
DS = Destination Airport
EDR = Eddy Dissipation Rate
ITA = IATA Turbulence Aware Platform
RWYCC = Runway Condition Code
TI2 = Terminal Information Request
TP = Turbulence Plot, followed by the region (e.g. HI) and running number
WN = Warning Number, followed by the Date-Time Group
• The airspace volume around an aircraft is defined
as a horizontal shape with a floor and ceiling height
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

11090.0 kHz KVM70 Honolulu Meteo, Hawaii

17958.0 kHz H10 HFDL Muan Air, South Korea, + aircraft B-MCG + B-30DJ + B-32K9 + B-326G + B-1211 + B-2412 + B-6331 + HL7639 + flight CCA976
Code figures for ZLXY runways braking action - see e.g. here
CFB = Centralized Fault Book
LID = Landing Information Delivery
PD = Profile Descent
PDC = Pre-Departure Clearance
REQFPN = FPL report request uplink
TDZ = Touchdown Zone
TI2 = Terminal Information Request

8942.0 kHz H07 HFDL Shannon Air, Ireland, + aircraft CN-ROU + N622UP + RA73097 + 7T-VJC + flight ABY695 + TP0440
Code figures for EDDK runways braking action - see e.g. here
AGM = Miscellaneous Air/Ground Message
FLR = Failure
FR = Fault Report, followed by the Date-Time Group
RWYCC = Runway Condition Code
TI2 = Terminal Information Request
TPIC = Tire Pressure Indicator Computer

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

13988.5 kHz JMH4 Tokyo Meteo, Japan

13988.5 kHz JMH4 Tokyo Meteo, Japan

13988.5 kHz JMH4 Tokyo Meteo, Japan

5720.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft A6-BLE + A7-ANL + B-32EW + N22922 + RA73102 + RA73848 + flight FIN61
DT = Destination, followed by the runway number
FN = Flight Number
• The TP4 (= Transport Protocol Class 4) message
notifies the pilot of an ATSU identifier
• 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

5720.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft B-8366 + RA73705 + RA73761 + RA73771 + RA73774 + flight THY215
DFB = Digital Flight Book

11387.0 kHz H04 HFDL Riverhead Air NY, United States of America, + flight ETH519 + IBE031

8939.0 kHz H10 HFDL Muan Air, South Korea, + aircraft B-8559 + JA218P + flight CES272 + CES645
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
LID = Landing Information Delivery
PDC = Pre-Departure Clearance
TI2 = Terminal Information Request

518.0 kHz NMW United States Coast Guard Astoria OR, United States of America
2025, not 2015 ...

518.0 kHz EQM Bushire Radio, Iran

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

13044.3 kHz FUV French Navy Jibuti, Djibouti
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

6646.0 kHz H09 HFDL Barrow Air, Alaska, + aircraft B-1076 + EC-OLG + N841FD + flight CHH729
go2MONITOR's superb Result Viewer has a post processor feature
running after the signal was received, extracting sender
and receiver IDs, position data, and more
For ADS-B signals, the post processing was adapted
to extract airplane positions and their addresses sent
EC-OLG is a scheduled service NZAA - RJAA - NFFN - NZAA
by Wamos Air on wet lease for Air New Zealand ...
KMEM - PANC cruise data ...
The figures group after the destination is the running number
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
TI2 = Terminal Information Request

5514.0 kHz H02 HFDL Hoolehua Air, Molokai, Hawaii, + flight ACA96 + APZ131

518.0 kHz Centre Regional Operationnel de Surveillance et de Sauvetage Toulon, France
LB = Lighted Buoy
LF = Light Float

6646.0 kHz H09 HFDL Barrow Air, Alaska, + aircraft XA-ARU + flight NCA172
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
Message H1 is corrupted ...
EGT = Exhaust Gas Temperature
• Engine Cruise Report RKSI - PANC ...
= 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 ...

518.0 kHz PKX Jakarta Radio, Indonesia
TC = Tropical Cyclone

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

4209.5 kHz XVN Nha Trang Radio, Viet Nam

15025.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft A7-ANL + CN-RHA + UK78706 + 9V-SGG + flight ANA204 + CPA382
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
A SNOWTAM decoder can be found e.g. here
AA = Arrival Airport
AP = Approach type and runway number
CFB = Centralized Fault Book
DA = Departure Airport
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

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

518.0 kHz UDN Novorossiysk Radio, Russian Federation

518.0 kHz RFA Astrakhan Radio, Russian Federation

518.0 kHz SVK Kerkyra Radio, Greece

518.0 (!) kHz GCC Cullercoats Radio, United Kingdom
This transmission has been received out-of-slot at 1855Z ...

11184.0 kHz H03 HFDL Reykjavik Air, Iceland, + aircraft B-308M enroute LIMC - ZSPD
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

518.0 kHz 3BM Port Louis Radio, Mauritius

8582.0 kHz PWZ Brazilian Navy Rio de Janeiro, Brazil

8582.0 kHz PWZ Brazilian Navy Rio de Janeiro, Brazil

490.0 kHz Grindavik Radio, Iceland

8677.0 kHz CBV Valparaiso Radio, Chile

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

8977.0 kHz H03 HFDL Reykjavik Air, Iceland, + flight CCA931 + CPA372

16976.0 kHz PWZ Brazilian Navy Rio de Janeiro, Brazil

11354.0 kHz H09 HFDL Barrow Air, Alaska, + aircraft CN-ROJ + RA73723 + RA73752
Solar cycle maximum - and the ionosphere going crazy:
OOOI downlinks from a GMMN - UUEE trans-European flight ... via Alaska!
Crew name and personnel number list ...
Perfect OOOI: on 0348, in 0354, door open 0359, closed 0559, out 0603, off 0620
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
PF = Pilot Flying
PM = Pilot Monitoring

11354.0 kHz H09 HFDL Barrow Air, Alaska, + flight AIC147 + CES583

8416.5 kHz VFF Canadian Coast Guard Iqaluit NUN, Canada

16971.0 kHz JJC Kyodo Tsushin Tokyo, Japan

4209.5 kHz XSG Shanghai Radio, China

13920.0 kHz VMC Charleville Meteo QLD, Australia

17967.0 kHz H15 HFDL Muhurroq Air, Bahrain, + aircraft A6-AEI + A6-EIP + A6-EIV + SU-GCS + 7O-AFH + flight ETH707 + ETH808
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
AA = Arrival Airport
AP = Approach type and runway number
DA = Departure Airport
DT = Destination, followed by the runway number
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

8416.5 kHz L2C Argentinian Coast Guard Buenos Aires, Argentina

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

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

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

518.0 kHz 4XO Haifa Radio, Israel
NTM = Notice to Mariners
RCC = Rescue Coordination Centre

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

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

518.0 kHz 9MG Georgetown Radio, Pinang Island, Malaysia

518.0 kHz UGE Arkhangelsk Radio, Russian Federation

13312.0 kHz H15 HFDL Muhurroq Air, Bahrain, + aircraft A6-EIA + A6-EIP + B-1149 + HZ-NS45 + SU-NMH + TC-LGG + VT-ANK + 9N-ALM + 9V-SMU + flight KNE512
EWAS = Electronic Weather Awareness Service
HCC = Hub Control Center
TI2 = Terminal Information Request
• The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

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

17958.0 kHz H10 HFDL Muan Air, South Korea, + aircraft B-2419 + B-7832 + JA826P + flight CCA421
AGM = Miscellaneous Air/Ground Message
LGTP = Light Plus Turbulence = relatively greater intensity
OCC = Operations Control Centre

4209.5 kHz TAH Istanbul Radio, Turkey

4209.5 kHz TAH Istanbul Radio, Turkey

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

518.0 kHz SUK Quseir Radio, Egypt
BA = British Admiralty
EGPC = Egyptian General Petroleum Company
ENI = Ente Nazionale Idrocarburi
GUPCO = Gulf of Suez Petroleum Company
PETROBEL = Belayim Petroleum Company = EGPC + ENI

490.0 kHz IGS Piombino Radio, Italy

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

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

13312.0 kHz H15 HFDL Muhurroq Air, Bahrain, + aircraft A6-EIA + A6-EIB + A6-LRH + EP-IJA + flight AEA098
MCC = Maintenance Control Center
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

17967.0 kHz H15 HFDL Muhurroq Air, Bahrain, + aircraft A6-LRI + A7-BOC + HZ-NS54 + LY-HMD + RA73154 + flight UAE62T
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
ROP = Runway Overrun Protection
ROW = Runway Overrun Warning
URV = Utility Runway Visual Approach Zone
WN = Warning Number, followed by the Date-Time Group
• 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

11090.0 kHz KVM70 Honolulu Meteo, Hawaii

518.0 kHz Gislovshammar Radio, Sweden

518.0 kHz UUI Odessa Radio, Ukraine
Warnings still in force - received 272230Z NOV 2025

518.0 kHz JGC Yokohama Radio, Japan

8894.0 kHz H11 HFDL Panama City Air, Panama, + aircraft CN-RHB + EC-NVR + HP1538 + N742AM + N889FD + flight VIV202
LEMD - MMMX cruise data ...
The figures group after the destination is the running number
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
MDPWI = Meteorological Data - Predicted Wind for FL 370 350 330 310
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

17967.0 kHz H15 HFDL Muhurroq Air, Bahrain, + aircraft A6-EXC + ET-BCE + HZ-NS45 + HZ-NS63 + HZ-NS65 + HZ-NS88 + OO-LFC + SU-GDC + TC-MCO + flight SVA421
CFB = Centralized Fault Book
CFD = Centralized Fault Data
TI2 = Terminal Information Request
WN = Warning Number, followed by the Date-Time Group
• Engine Cruise Report OPKC - LTFM ...
= collection of data over a period of time
in which the aircraft met the appropriate stability criteria
If no stability is detected, then the report
ends with NO STABLE FRAME CONDITION
• Aircraft in-flight performance parameters such as OIT = Oil Temperature are explained e.g. here
• The yellow table below shows a typical parameters list ...

17016.8 kHz KPH San Francisco Radio CA, United States of America
MEBA = Marine Engineers Beneficial Association

6340.5 kHz NMF United States Coast Guard Boston MA, United States of America

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

21934.0 kHz H01 HFDL San Francisco Air CA, United States of America, + flight AVR520

7795.0 kHz JMH2 Tokyo Meteo, Japan

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

13570.0 kHz HLL Soul Meteo, South Korea

13570.0 kHz HLL Soul Meteo, South Korea

8942.0 kHz H07 HFDL Shannon Air, Ireland, + aircraft B-32AV + CN-ROZ + flight UAE96R
DEST + CONT + ALTN + RESV + ADDN + DISC = TKOF + TAXI = LOAD
AGM = Miscellaneous Air/Ground Message
CCO = Operations Control Centre
CI = Consistency Index
FF = Fuel Flow
ISA = International Standard Atmosphere
OFP = Operational Flight Plan
W/C = Wind Component

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

13351.0 kHz H05 HFDL Auckland Air, New Zealand, + flight CES528 + CES633

4209.5 kHz XVG Hai Phong Radio, Viet Nam

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

17916.0 kHz H13 HFDL Santa Cruz Air, Bolivia, + aircraft EC-NIG + VN-A898 + XA-ADD + flight AVA115 + AVA116
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
SAEZ - MMMX cruise data ...
The figures group after the destination is the running number
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
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response
FCO ADS = Facilities Contact ADS-C
FCO ATC = Facilities Contact CPDLC
FMH = Facilities Message Header = Flight Number
FPO = Facilities Current Position
• CPDLC ADS-C message headers are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
• Codes of FIRs providing data link services
such as EGGX PAZN YMMM ANC____ FUK____ YUK____
can be found here
• Codes of ACARS Message Labels can be found here

6619.0 kHz H10 HFDL Muan Air, South Korea, + aircraft B-2486 + flight APJ809
AGM = Miscellaneous Air/Ground Message
CFP = Computerized Flight Plan
FMS = Flight Management System
M/C = Magnetic Course
OEW = Operating Empty Weight
T/C = True Course
W/C = Wind Component
ZND = Zone Distance (between checkpoints)
ZNT = Zone Time (between checkpoints)

518.0 kHz EAR La Coruna Radio, Spain

12786.0 kHz NMC United States Coast Guard San Francisco CA, United States of America

11306.0 kHz H16 HFDL Barrigada Air, Guam, + aircraft B-18902 enroute YMML - RCTP
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

4500.0 kHz Digital data station

21997.0 kHz H13 HFDL Santa Cruz Air, Bolivia, + flight SVA103

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

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

12731.0 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 ZBM Hamilton Harbour Radio, Bermuda
CFR = Code of Federal Regulations

518.0 kHz VOK Canadian Coast Guard Cartwright NFLD, Canada

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

8416.5 kHz L2C Argentinian Coast Guard Buenos Aires, Argentina

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

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

518.0 kHz Balasore Radio, India

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

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 figures group after the destination is the running number
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

9982.5 kHz KVM70 Honolulu Meteo, Hawaii

16971.0 kHz JJC Kyodo Tsushin Tokyo, Japan

518.0 kHz GPK Portpatrick Radio, United Kingdom

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

7396.9 kHz HSW64 Bangkok Meteo, Thailand

7396.9 kHz HSW64 Bangkok Meteo, Thailand

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

4209.5 kHz XVG Hai Phong Radio, Viet Nam

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

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

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

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
NCEP = National Centers for Environmental Prediction
OPC = Ocean Prediction Center

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

6220.0 kHz IDN Italian Navy Napoli, Italy

12579.0 kHz NMO United States Coast Guard Honolulu, Hawaii

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 traditional Japanese calendar year in the Reiwa Era is used here
Formula: Reiwa year + 2018 = Gregorian year

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

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

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

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 traditional Japanese calendar year in the Reiwa Era is used here
Formula: Reiwa year + 2018 = Gregorian year

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

518.0 kHz CBV Valparaiso Radio, Chile

518.0 kHz L2T Argentinian Coast Guard Mar del Plata, Argentina

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

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

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

4209.5 kHz SVH Iraklion Radio, Greece

518.0 kHz XYM Myeik Radio, Myanmar

11086.5 kHz GYA Royal Navy London, United Kingdom

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

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

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

6825.0 kHz French Army Mont-Valerien, France

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 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

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

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 LGP Bodoe Radio, Norway

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

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

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

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

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

9982.5 kHz KVM70 Honolulu Meteo, Hawaii

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

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

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

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 2026 edition of our Perseus Frequency Database
now shows utility stations' callsigns as well!

8454.8 kHz FUG French Navy Saissac, France
New 2026 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