Questions tagged [acars]
ACARS is a digital datalink system that uses radio or satellite communications channels.
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Can I share ACARS messages online?
ACARS messages are transmitted via radio just like normal ATC communications are. In the UK, for example, it is illegal to listen to and broadcast ATC chatter. Does the same apply to ACARS? If an ...
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Can D-ATIS be obtained using D-ATIS Freq. & ACARS DSP?
Can D-ATIS be obtained using and what is the primary difference between
D-ATIS (Frequency given in Airport diagram(jeppesen)) ?.
2.Using AOC function and obtaining D-ATIS using DSP (SITA or ARINC))?.
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Why Minimum Shift Keying (MSK) used in ACARS (A618 protocol) but not Gaussian Minimum Shift Keying (GMSK)
It appears that A618 protocol defined for ACARS uses the MSK, why MSK was chosen instead of other spectral efficient protocols.
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What is the difference between ADS-A and ADS-C?
ADS was introduced by FANS Committee to be implemented in Aeronautical Telecommunications Network but Boeing took this concept and implemented in the existing ACARS network.
Right now CPDLC and ADS-C ...
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Is ACARS OOOI format standard & unified?
Are ACARS OOOI messages standard between all system manufacturers and service providers like ARINC and SITA ??
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What's the difference between ACARS and ATSU?
I've seen ACARS and ATSU used interchangeably and I've seen references that imply they're different things (ATSU being Airbus only).
How would I explain the difference to someone?
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Why doesn’t ACARS just use HF if it has better range than VHF?
Why does ACARS default to VHF if HF has a better range?
For example, when requesting ATIS from an airport, it will first try VHF, and if that fails, it will try HF. And if all hope seems lost, it ...
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Airline Ground Operations via ACARS
I read about the ACARS "In Range" request pilots can send to request cabin services, lavatory services, wheel chairs, assistance for unaccompanied minors, etc. What about other services such ...
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How is the gate/stand communicated to airline pilots?
I have heard that pilots use Controller–Pilot Data Link Communication or ACARS to know which gate (or stand?) they are supposed to be going to but haven't been able to find a definitive answer. Does ...
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Aircraft engine communication with satellite
Do pilots get an audible indication when the engines are communicating with the manufacturer whilst in flight. Do these "pings" or "hanshakes" begin on start up and are they always ...
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Why would holding instructions be sent as an ACARS message?
I was browsing ACARS messages listed on an aviation enthusiast website in Greece (similar to FR24 and others), and noticed a message sent to UA124, a 767 from KEWR to LGAV:
The SAT VOR is located at (...
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What does the ACARS Weight and Balance Request page look like?
In the ATSU AOC Preflight menu of an Airbus (maybe Boeing too), there is an option for a weight and balance request. The selection name varies by airline but it may say "W/B Req" "Send ...
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Can I generate & transmit ACARS message via software? [closed]
Is there any software available for generating ACARS message? If yes how to transmit that over RF?.
I want to do that for academic purpose. My settings are GNU radio and HackRF one.
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How do aircraft discern that an ACARS message is being sent to them?
This may be a simple question, but how do airplanes know which ACARS messages are meant for them from the ground? I'm not sure how physically close planes would have to be in order for that to be an ...
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Is there a good resource for ACARS messages?
Is there a good place to find out all the types of data that ACARS can send and receive? I've seen high level descriptions, but I'm looking for the data that actually gets fed from or to the Flight ...
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What is the difference between ACARS and ADS-B?
What is the difference between ACARS and ADS-B?
For weather information in-flight or pre-flight which one is used?
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What does "POS ITERV WAS CHGD" mean on the ACARS page of a Boeing 737?
During the whole flight, the message "POS ITERV WAS CHGD" appeared frequently on the ACARS page of the MCDU (Multipurpose Control and Display Unit). The aircraft is a Boeing 737. I cannot find any ...
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How is the Flight Plan Data transferred into an aircraft/plane?
I know that pilots have to fill the ICAO standard flight plan and send it to the relevant CAA to be checked, updated if needed and finally approved before the flight takes off. what I am looking for ...
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What are the fields of the ground reply (uplink) to a weight-and-balance request?
I am trying to send from the Aircraft MCDU AOC menu (via ACARS Data Link) , a Weight/Balance Request downlink to the Ground Station .
I would like to know what are the fields that make up the uplink ...
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How is the load & trimsheet form sent to ACARS?
After the last passengers and baggage are loaded onto the aircraft, the pilot in command is given a form called load & trimsheet which shows the passenger/baggage distributions, total weights and ...
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How can I identify airliner types that don't have ACARS?
Is there a way to identify what commercial airliners are still flying without ACARS today? Most modern commercial airliners are equipped, but I know some 737s still fly without ACARS, for example.
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Which frequencies does VDL Mode 2 use when used via the ATN (rather than ACARS)?
If I understand the slide below correctly (source), CPDLC can be used either via ACARS or via ATN.
I know that, in the case of VDL Mode 2, there are specific ACARS frequencies. Which frequencies are ...
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How can this ACARS message be decoded?
With regards to the text below, can someone offer either advice or a link to a website/document that would help decode ACARS messages.
I am ok with the following:
QU - ACARS "to" address
Q - ACARS ...
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To which security domain does the Cabin Intercommunication Data System (CIDS) belong?
I've read a lot about Cabin Intercommunication Data System (CIDS) functionalities and features, but yet it is not really clear to me if CIDS is part of the Airline Information Services Domain (AISD), ...
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How does VDL relate to ACARS and CPDLC?
I know that ACARS and CPDLC are 2 different systems, so I can compare ACARS vs CPDLC, but can I do the same comparation between CPDLC vs VDL? Or a CPDLC it’s a VDL?
If CPDLC it is a VDL, ACARS it is ...
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How do military fighter aircraft identify themselves and each other?
I live in an area where there is much NATO military activity. Often there are various fighter aircraft fly-overs. But none of the common websites such as flightradar24, flightaware and ...
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Why do cockpits with ACARS have printers?
Most cockpits with ACARS have a thermal printer that is used for printing out information received. Why is this information printed out rather than displayed on a scrolling computer screen? Maybe I'...
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How do SIGMETs arrive in a cockpit on a modern longhaul flight?
What is todays medium of choice (Voice Radio, ACARS,CPDLC,…) to receive SIGMET messages on a commercial longhaul flight, for example from continental Europe to the US westcoast?
Are there any ...
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What is the format of the airport codes used in an ACARS OOOI message?
How are the departure and arrival airport codes in the OUT, OFF, ON and IN (OOOI) fields identified by ACARS and transmitted to ground systems?
For example, if my aircraft is diverted unexpectedly to ...
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What are the differences between ACARS and CPDLC?
What are the differences between Aircraft Communication, Addressing and Reporting System (ACARS), and Controller Pilot Data Link Communication (CPDLC)?
Can anyone please let me know in short, what is ...
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How to get the fuel on board reading on UVdatalink via Honeywell ACARS system?
I would like to find out if anyone has encountered the following issue and how was it rectified.
We are currently seeing the following results on UVdatalink for some of our aircraft that have ...
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What avionics systems are interfaced with ACARS?
I am a librarian looking for sources of information to help answer the following questions for one of our researchers: 1. what avionics systems are interfaced with ACARS and 2. how is the interaction ...
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What is the significance of the exclamation mark (!) on ACARS page of a Boeing 737?
For a while now I've noticed an exclamation mark on the ACARS inflight page of the B737NG at the beginning of a flight. It is located in the top left corner of the page and it just disappears after a ...
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What are the ACARS frequencies and what is their usage?
I have been playing with a SDR dongle. I have been able to decode some ACARS signals using SDR# and acarsd. I have noticed in my area (35 miles west of DFW airport) there are a number of frequencies ...
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Is implementation of CPDLC mandated by EASA?
Is CPDLC (Controller–pilot data link communications) mandatory by EASA? I have not heard any update that Airlines are using CPDLC. While talking to some of the pilots I heard that they have been ...
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Is it possible to ping ACARS repeatedly and track an aircraft?
This is a followup to What data does ACARS send back to base? Can it be used to track a plane?
I had asked this as a part of the earlier question, but it seems to be a large enough issue to be ...
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What data does ACARS send back to base? Can it be used to track a plane?
An aircraft's Aircraft Communications Addressing and Reporting System uses line of sight HF via ground stations or satellites to communicate with its base station.
This system allows for three types ...
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