12/05/19 21:48:06 UTC
327.475 MHz
ORMOND BEACH, FL
Fighters in contact with tanker in the warning area
 
12/05/19 21:48:03 UTC
327.475 MHz
ORMOND BEACH, FL
Fighters in contact with tanker in the warning area
 
12/05/19 21:48:01 UTC
327.475 MHz
ORMOND BEACH, FL
Fighters in contact with tanker in the warning area
 
12/04/19 18:23:57 UTC
148.6000 MHz
ALBEMARLE, NC
148.6 AM "...LUZON DZSO, GECKO22..." 1311h 12/04/2019 Good Rx from Stanly Co NC -AJ
 
12/04/19 13:52:27 UTC
252.1 MHz
GARDNER, MA
REACH 7031 calling Casino Royale (Westover). "We'll be with you in a minute, no pax no passengers..."
 

11/24/19 00:10:40 UTC
245.6500 MHz
A2A "..that would be much better..I'm on 351.9.." "looking at a 2 point 7 now" etc. Marginal Rx. 11/15/2019. 1044-1102h local -AJ
 
11/17/19 20:13:41 UTC
148.625 MHz
A2A, some sort of fixed wing formation. "push to 128.8" @ 1451h. "257.1 for Command Post, Uniform 2" @1455h and discussing landing on Rwy05. Weak rx starting 1430h til last heard approx 1500h which were very good rx, 11/17/2019 -AJ
 
11/15/19 00:24:24 UTC
38.825 MHz
"Can you relay to TALON OPS we're about 30 minutes out from landing..." no response rx'd then "..Say again? Came in kinda garbled" A2A presumably, background noise indicates helo, and indeed bout 60 to 90 seconds later a helo passed from east to west over my position, in Stanly Co NC. Very good rx. 11/14/2019 1844h -AJ
 
11/05/19 16:32:28 UTC
271.4 MHz
Maryland air guard A-10s working Bollen Range, Indiantown Gap, PA.
 
11/02/19 21:48:24 UTC
225.000 MHz
"BACKY62, how do you hear this?" 11-02-2019 1258h. -AJ
 
10/30/19 15:39:25 UTC
140.125 MHz
"...ninety degree left turn..." 1057h 10-29-2019. Earlier in the morning and some on 10-28-2019 had noticed static tx's on this frequency in AM, and finally switched to FM and that was the last transmission rx'd on 140.125 since. Certainly worth watching. -AJ
 
10/29/19 14:52:14 UTC
238.9 MHz
Jake 31 calling for Maine 85 for refueling over Duke MOA
 

Aeronautical Radio, Inc. (commonly known as: "ARINC") maintains a huge VHF
Introducing ACARS
and HF voice network throughout the United States and overseas to provide
operational radio communications for the aircraft industry. In the early eighties
they developed an addressable, digital data link for commercial and business jets
and their respective companies known as ACARS. ACARS stands for Aircraft
Communications Addressing and Reporting System. It was produced to
reduce the flight crew's work-load by using modern computer technology to
exchange many routine reports and messages. This improves the safety and
efficiency of modern air travel.
ACARS uses the AM mode because the same airborne VHF radio is often also
used for voice communications. Burst transmissions are used with a limit of 220
ACARS FREQUENCIES
characters per message. Transmissions often last less than one second!
MHz Function
Therefore when monitoring ACARS it is important to leave your receiver's
131.550
Primary USA/Canada
squelch off. To monitor ACARS transmissions you will need a VHF scanner or
130.025
Secondary USA
receiver capable of tuning the VHF (AM) aircraft band 118 to 136 MHz.
129.125
Tertiary USA
ACARS messages are very structured. Each position in the message has a
131.725
Primary Europe
specific function. The very common Q0 Link Test is shown as an example below.
131.450
Primary Japan
131.475
Private Air Canada
Address Field
Message Label
Downlink Block Identifier
ACARS DECODERS
.N9009U Q01
5400UA1750
Message Sequence Number
Carrier & Flight Number
There are nearly one hundred "standard" ACARS message formats plus a
virtually unlimited number of airline specific company formatted message types.
Universal ACT-1 Interface
The following two examples are typical of standard ACARS message formats.
This compact PC interface simply
plugs into the serial port of your PC.
The supplied user-friendly software
The QG OUT/RETURN IN REPORT, like many other ACARS downlinks, is
includes mouse support. You can
transmitted automatically. Many ACARS downlinks are sent automatically as a
view, filter, print and save the data.
result of on-board sensor activation, especially during takeoff and landings. This
You can also view, search and print
report is transmitted by an aircraft that leaves the gate, but for some reason must
previously logged data. Includes a
free copy of the book Understanding
return back to the gate.
ACARS. Under $100.
QG - OUT/RETURN IN REPORT
AOR ARD-2
Here is a "go anywhere" decoder for
ACARS and NAVTEX. It provides
portable operation from 4 internal AA
Tail Number N330AA
cells (not supplied) or external 12 VDC,
Message Type QG
and a computer is not required. ACARS
is the VHF teletype mode audible on
.N330AA QG
most scanners. NAVTEX stands for
3115AA001SFO05070516
Navigational Telex, sent predominantly
on the longwave frequencies of 518
and 424 kHz, audible on most short-
wave communications receivers. In-
coming text is displayed on the 16
character by 2 line LCD display. A
Return Back To Gate 0516
built-in speaker with volume control
Out From Gate 0507
allows you to monitor activity. A 9600
Origin San Francisco
baud DB9 serial port is provided for
Flight Number American #1
optional use with a personal computer.
Message Sequence 3115
Under $400.
in min. and sec. past the hour.
Introducing ACARS
Page 1
Tail Number N370 US Air
Q1 - DEPARTURE/ARRIVAL RPT.
Message Type Q1
This report is sent from the aircraft in-
Out 0731
forming the ground station the time it left
Off 0743
the gate, the wheels-up time, the desti-
Fuel 0300
nation, fuel and other data.
Destination Pittsburgh
Free Talk
Captain First Officer Flight Attendant
N370AU Q1
4243AL0604SFO07310743
0300PIT/FP 431/DC 0730/CO 29849/FO 37531/A1 30152/A
30588/A3 34613 7
Origin San Francisco
Flight
Message Sequence 4243
in min. and sec. past the hour.
MESSAGE TYPES
Label
SMI
Message Title
Label
SMI
Message Title
_j
No info to transmit. Polled mode ¹
CB
Printer status = busy
_DEL
General response, Demand mode; no
CC
Printer status = local
information to transmit¹
CD
Printer status = no paper
00
HJK
Emergency situation report
CE
Printer status = buffer overrun
2S
Weather request
CF
Printer status = reserved
2U
Weather
F3
Dedicated transceiver advisory
4M
Cargo information
H1
Message to/from terminal
51
Ground GMT request response
HX
REJ
Undelivered uplink report
52
AGM
Ground UTC request
M1
MVA
IATA Departure message
54
Aircrew initiated voice contact request
M2
MVA
IATA Arrival message
57
AEP
Alternate aircrew initiated posit. rpt.
M3
MVA
IATA Return to ramp message
5D
TIS
ATIS request
M4
MVA
IATA Return from airborne message
5P
Temporary suspension of ACARS
Q0
ACARS link test
5R
AEP
Aircraft initiated position report
Q1
ETA Departure/arrival reports
5U
WXR
Weather request
Q2
ETA
ETA reports
5Y
ETA
Revision to previous ETA
Q3
CLK
Clock update
5Z
AGM
Airline designated downlink
Q4
Voice circuit busy (response to 54)
7A
ENG
Aircraft initiated engine data
Q5
Unable to process uplinked messages
7B
ABM
Aircraft initiated misc.message
Q6
Voice-to-ACARS change-over.
80-9
Aircraft addressed downlinks
Q7
DLA
Delay message
A1
CLX
Deliver oceanic clearance
QA
DEP
Out/fuel report
A2
CLD
Deliver departure clearance
QB
DEP
Off report
A4
RCA
Acknowledge PDC
QC
ARR
On report
A5
RPR
Request position report
QD
ARR
In/fuel report
A6
RAR
Request ADS report
QE
DEP
Out/fuel destination report
A7
FTU
Forward free text to aircraft
QF
DEP
Off/destination report
A8
DDS
Deliver departure slot
QG
RTN
Out/return in report
A9
DAI
Deliver ATIS information
QH
DEP
Out report
A0
AFN
ATIS Facilities notification
QK
ARR
Landing report
B1
RCL
Request oceanic clearance
QL
ARR
Arrival report
B2
CLA
Request oceanic readback
QM
ARR
Arrival information report
B3
RCD
Request departure clearance
QN
DIV
Diversion report
B4
Ackn. departure clearance
QX
Intercept
B5
PPR
Provide position report
RA
RPR
Command aircraft term. to transmit data
B6
PAR
Provide ADS report
RB
Response of aircraft terminal to RA msg.
B7
FTD
Forward free text to ATS
:;
Command aircraft xcvr to change freq.
B8
RDS
Request departure slot
B9
RAI
Request ATIS information
¹ These are non-printing
Message Direction
C0
Uplink msg. to all cockpit printers
characters, and will
Downlink.
C1
Uplink msg. to cockpit printer #1
not be displayed.
Uplink.
C2
Uplink msg. to cockpit printer #2
Uplink or downlink.
C3
Uplink msg. to cockpit printer #3
Ground to ground.
CA
Printer status = error
Introducing ACARS
Page 2
ABBREVIATIONS
0A
Passengers in first class
OF
Time off
AEP
ICAO position report with wx.
0B
Passengers in business class
ON
Time on
AGM Start of standard message
0C
Passengers in coach class
OP
Oil pressure
ALT
Altitude
AL
Flight level
OS
Other supplementary info.
ALT
Altimeter
CG
Center of gravity
OT
Time out or oil temperature
APP
Approach
CI
Cost index
OV
Present location (over)
AWD Automated weather data
CL
Cruising level
PB
Number of persons on board
BBG
in reference to HAZMAT cargo
CR
Company route
PD
Point of departure
BKN
Broken
CW
Cruise wind
PW
Position weather
CHP
Chop
CZ
Cruising speed
QN
Altimeter settings
CLR
Clear
DA
Departure aerodrome
RD
Departure runway
CPT
Captain
DG
Drag factor
RF
Request flight level
CRZ
Cruise altitude
DP
Dew point
RI
Return in time
CVG
Covering
DS
Destination station
RL
Requesting cruising level
DAI
Display aircraft itinerary
E1-9
Engine parameters
RM
Remarks
DBI
Data base initialization-update
EO
Estimated time over
RO
Return on time
DDG
in reference to HAZMAT cargo
FB
Fuel on board
RT
Route information
DDX
Display dispatch message
FC
Estimated further clearance
RL
Request cruising level
DEV
Display aircraft deviations
FD
Fuel over destination
SA
Latest weather
DFR
Display flight routing
FF
Fuel flow factor in lbs/hr.
SI
Special communication
DLD
in reference to cargo
FI
Flight Identification
SK
Sky conditions
DTX
Display text
FL
Flight level
SL
Selcal code
EDA
Engine data
FO
First officer
SP
Significant point
EFC
Expect final clearance
FR
Fault report prefix
ST
Standard takeoff power
EGT
Exhaust Gas Thrust
FX
Enroute fix
TA
Static air temperature
ENG
Engine data
GL
Geographical location
TB
Turbulence
EOK
Everything "OK"
HD
Aircraft heading
TD
Takeoff temperature
EON
Expected touchdown time
IC
Aircraft icing
TE
Time enroute
EPR
Exhaust pressure ratio
IN
Time in
TM
Surface air temperature
ERR
Error message
IR
In range (of VHF radio)
TO
Time over
ERT
Estimated ramp time
LA
ID of officer landing aircraft
TP
Transmission path
FDD
Flight data recorder info
LT
Light
V1
Velocity 1
FLR
Fault report
MA
Message assurance
VR
Rotate speed (& runway vis rng)
FLT
Flight
MN
Maintenance
V2
Velocity 2
FOB
Fuel on board
MT
Maximum takeoff power
WI
Weather
FPR
Flight plan request
N1
Speed of turbine 1
WV
Wind information
FRM
Maintenance codes
NA
Navaid
WR
Warning prefix
FTM
used before waypoint name
NL
Number of landings
WX
Weather
LIF
request for Load information
NP
Next report point
ZW
Zero fuel weight
LND
Landing
MCH Mach (aircraft speed)
MEL
Minimum essential list
APRCH
Approach
OCC
Occasional (weather)
ARINC
Aeronautical Radio Inc.
OFF
Off time
ATISRQ
ATIS request
OUT
Out time
AWDAF
Auto Wx Data-Area Forecast
OVR
Over
AWDFT
Auto Wx Data-Terminal Area Forecast
POS
Position
AWDSA
Auto Wx Data-Air route Forecast
PWD Predicted weather data
CLIMB
Climbing
RVR
runway visual range
CRUISE
Cruise level
SAT
Static air temperature
DESCEN
Descending
SMI
Standard message identifiers
INCLIMB
In climb
SMT
Standard message text
INRANG
In range of (VHF)
TEI
Text element identifiers
INRP
In report
TIS
ATIS information
LEVEL
Level flight
TKO
Takeoff
LIVE
Live cargo (animals)
TRB
Turbulence
OFFRP
Off report
TXT
Text
ONRP
On report
TYP
Type
OUTRP
Out report
VEC
Vector
PIREP
Pilot's report
WND Wind (direction/velocity)
POSWX
Position weather
WOB Weather observation
TYP 1
Type 1 weather request
WRN Warning
UDCST
Undercast sky
WXA Weather at
WXRQ
Weather request
WXR Weather
Introducing ACARS
Page 3
AIRPORT IDENTIFIERS
PLAIN TEXT MESSAGES
IATA
ICAO
Airport
The ACARS system can also be used to passing
ATL
KATL
Atlanta, GA
routine text traffic as in the following example:
BDL
KBDL
Hartford, CT
BER
EDBB
Berlin, GERMANY
.N908UA
BHM
KBHM
Birmingham, AL
BKL
KCLE
Cleveland, OH
ESTIMATING ARRIVAL
BNA
KBNA
Nashville, TN
AFTER CURFEW, LOCAL
BOS
KBOS
Boston, MA
CDG
LFPG
Paris, FRANCE (de Gaulle)
MANAGEMENT WILL
CGX
KORD
Chicago, IL (Meigs)
MAKE DECISION
CHC
NZCH
Christchurch, NEW ZEALAND
WHETHER TO LAND
CHI
Chicago, IL
AFTER CURFEW OR
CMH
KCMH
Columbus, OH
DIVERT. THIS
CVG
KCVG
Cincinnati, OH (Covington, KY)
INFORMATION WILL BE
DFW
KDFW
Dallas-Ft.Worth, TX
RELAYED TO FLIGHT
DCA
KDCA
Washington, DC (National)
ENROUTE BY CHIEF.
DEN
KDEN
Denver, CO
PENALTY FOR CURFEW
DTW
KDTW
Detroit, MI
EWR
KEWR
Newark, NJ
VIOLATION WILL BE
FCO
Rome, ITALY (Da Vinci)
HANDLED BY LGB.
IAD
KIAD
Washington, DC (Dulles)
(CHIDD PEK 07/28/
JFK
KJFK
New York, NY (Kennedy)
90)
LAX
KLAX
Los Angeles, CA
LGA
KLGA
New York, NY (La Guardia)
This message was to a crew who was going to be late
LGW
EGKK
London, ENGLAND (Gatwick)
in landing at Long Beach.
LHR
EGLL
London, ENGLAND (Heathrow)
AIRLINE CARRIERS
MCO
KMCO
Orlando, FL
MEM
KMEM
Memphis, TN
ICAO IATA Airline
Country
MDW
KMDW
Chicago, IL (Midway)
AAL
AA American Airlines
U.S.A.
MEX
MMMX
Mexico City, MEXICO
ACA
AC AirCanada
Canada
MIA
KMIA
Miami, FL
AWE
HP America West
U.S.A.
MUC
EDDM
Munich, GERMANY
BAW
BA British Airways
U.K.
MSP
KMSP
Minneapolis/St. Paul, MN
COA
CO Continental Airlines
U.S.A.
MSY
KMSY
New Orleans, LA
DAL
DL Delta Airlines
U.S.A.
NRT
RJAA
Tokyo, JAPAN (Narita)
DHL
ER DHL Airways
U.S.A.
NYC
KEWR
New York, NY (Newark-NJ)
FDX
MB Federal Express Corp.
U.S.A.
OAK
KOAK
San Francisco, CA (Oakland)
FTL
FT Flying Tiger Line
U.S.A.
ORD
KORD
Chicago, IL (O'Hare)
FWL
Florida West Airlines
U.S.A.
ORY
Paris, FRANCE (Orly)
HAL
HA Hawaiian Airlines
U.S.A.
PHL
KPHL
Philadelphia, PA
IBE
IB
Iberia Airlines
Spain
PIT
KPIT
Pittsburgh, PA
NWA NW
Northwest Orient
U.S.A.
PWK
KPWK
Chicago/Wheeling, IL
OZA
Ozark Airlines
U.S.A.
SFO
KSFO
San Francisco/Oakland, CA
PAI
PI
Piedmont Aviation
U.S.A.
SLC
KSLC
Salt Lake City, UT
QFA
QF
Quantas Airways
Australia
STL
KSTL
St. Louis, MO
SWA
SR
Swissair
Switzerland
SNN
EIAA
Shannon, IRELAND
TWA
TW
Trans World Airlines
U.S.A.
TPA
KTPA
Tampa/St. Petersburg, FL
UAL
UA
United Airlines
U.S.A.
TPE
RCTP
Taipei, TAIWAN
UPS
SX
United Parcel Service
U.S.A.
YYZ
CYYZ
Toronto, ON-CANADA
USA
US
U.S. Air
U.S.A.
IATA
= International Air Transport Association
ICAO
= International Civil Aviation Organization
FURTHER READING
Understanding ACARS - Third Edition
By Ed Flynn
This detailed and informative book takes the mystery out of
decoding ACARS. (Universal)
Price:
$ 9.95
The Worldwide Aeronautical Communications
Frequency Directory - Second Edition
By R.E. Evans
The most complete and up-to-date aero frequency directo-
ry ever published. Over 2350 frequencies covering voice
and data on HF, VHF & UHF. (Universal) Price: $19.95
Introducing ACARS
Page 4