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13

Not all cockpits with ACARS have a printer for it -- it's an entirely optional part of the system. The printer is there so that you don't have to copy by hand information that you want or need to have available. For example, ATIS is desirable to have in hard-copy, so that when you need some piece of it immediately (say, the altimeter as you're descending ...


13

CPDLC CPDLC is used for communication to/from ATC facilities. As the name suggests, it's a controller—pilot link. An aircraft with CPDLC has one of the following panels/interfaces: 787 example: The pilot can accept, cancel, or reject an instruction. Uploaded instructions are automatically fed into the different MCP windows, for example UL (uplink) 250 for ...


12

Okay guys, the verdict is in. It is a symbol to indicate the crew alerting chimes are inhibited. From OUT (off block) until OFF+15 and estimated ON-10 until IN (on block) the chimes to alert for new data and messages are suppressed to avoid nuisance warnings during critical flight phases. Happy landings!


9

Your aircraft is reporting its position periodically over the Aircraft Communications Addressing and Reporting System (ACARS) to the airline operations centre (AOC). Since there are costs related to sending these position messages, the interval in which these message are sent drives operating costs for the airline. This patent from China Southern ...


9

Can ACARS be turned off? Would this generate a warning at the base station? Yes, ACARS can be turned off. See another answer of mine for more details. Typically other systems use ACARS to send reports on a regular basis to update position and track other information, plus on an "as-needed" basis for abnormal things. It would be up to the individual ...


6

TL;DR : according to the most usual meanings of these acronyms : ACARS and CPDLC are applications VDL is a point-to-point communication technology To give an everyday-world analogy, the relationship between VDL and CPDLC/ACARS is the same as the relationship between 3G/4G and the web browser/facewhatstime app of your smartphone. More detailed answer ...


6

One can easily get lost in the alphabet soup that is datalink. Both ACARS and ADS-B provide datalink applications – which can be broken down in terms of CNS: Communication, Navigation, and Surveillance. ACARS is used for: Communication: includes uplinking (ground → aircraft) weather data upon a downlink request to the company/service provider – not a ...


5

First, as other answers have stated, you're not actually required to file a flight plan unless you're flying IFR. That having been said, if you do file a flight plan, there are several ways you can get it programmed into the airplane: You don't The flight plan is never loaded into the navigation system at all. It's either on paper or loaded into a tablet, ...


5

According to the specs ACARS supports direct to satellite linking so planes flying over you may not be broadcasting on one of those frequencies. Similarly, if broadcasting over VHF you are line of sight limited. At high altitudes you may see ranges up to 200 Nautical Miles however if the planes are low overhead they may not be broadcasting as they are out of ...


5

When ACARS communicates via INMARSAT satellite (other options are VHF or HF to ground stations), the satellite can ping the receiver on the aircraft and determine the distance from the delay of the reply. The satellite is geostationary, meaning that it is a fixed point 35786 km above the earth. Based on the distance from the satellite you can calculate a ...


5

ACARS, otherwise known as Aircraft Communications and Addressing Reporting System, is almost always interfaced with the #3 VHF Communication System. Ordinarily, that #3 VHF system is set for "Data Mode." Some aircraft have the ability to use the #3 VHF as an auxiliary communications system by putting it in voice mode, and other aircraft dedicate it to ...


4

Some additional information (and corrections)... The slide is not totally correct (sorry for Airbus) as the same VDL-2 ground stations are used to transport both FANS-1/A CPDLC (A623) and ATN CPDLC over the AVLC protocol (VDL-M2). The two networks are interconnected... But depending on the media access scheme (Plain Old ACARS (POA - refered as VDL-A on the ...


3

This varies between airlines. In my company (large European Carrier) SIGMETs are uplinked to us via ACARS and then automatically printed on the cockpit printer. The differences in regions is the format of the SIGMET. In the USA the points of a polygon are mostly described as list of DIR/DIST of VORs (eg 15NM NE STL). Very hard to read if you are unfamiliar ...


3

ACARS messages, unsurprisingly, use IATA airport codes. See ARINC 618, 619, 620 etc. - ACARS, Dr. Maarten Uijt de Haag, Ohio University


3

ACARS encoding is usually different from customer to customer. Decoding it can be very difficult, even if you have access to the aircraft to have some idea of what is being sent. Usually, the manufacturer won't share the details with anyone other than the original customer, expecting subsequent operators to pay for custom coding on the ACARS. A general ...


3

Can ACARS be turned off? Would this generate a warning at the base station? Everything can be turned off, especially in an aircraft. It will probably not generate a warning at the base station immediately, because long distance data comms are not always reliable. It would cause too many false warnings. Can ACARS send position, altitude and heading ...


2

In theory you can triangulate from any signal that is being sent from a craft, but the big problem you'll run into with this solution is that ACARS only fires off bursts every half of an hour or if the engine trips certain parameter flags. Again, a possibility but not horribly useful. I suppose aircraft designers could go ahead and increase the number of ...


2

Military aircraft, like civil aircraft have transponders. Military aircraft are assigned military codes, and their transponders have special military modes. An aircraft doesn't need a transponder to be "illuminated" by radar, but the transponder enhances the "blip" and modern transponders transmit additional aircraft information such as altitude (Mode C). ...


2

Unfortunately the term ACARS is one of the most misunderstood and misused terms in aviation. ACARS - Aircraft Communications Addressing and Reporting System - was created as an end-to-end datalink between aircraft and the airline dispatchers. It provided basic text data using the ARINC Specification 618-8. (Unfortunately not free.) As datalink ...


1

When the loadsheet arrives to the aircraft via ACARS it has to be acknowledged and printed. This is accomplished by the flight crew by selecting the proper screen and pressing the respective button or LSK on the MFD (Multi-Function Display for latest Boeing models) or in the MCDU (Multi-Function Control Display Unit for Airbus). Along with the ...


1

ACARS is a operator specific (optional) system. It depends on the operators requirements if an aircraft is equipped with ACARS or not. You can't tie it to an aircraft model or variant. As a rule of thumb: The older the aircraft, the less likely it is ACARS equipped.


1

As the commentators above pointed out, there are some issues with your question due to the concepts involved. As @Bluephoenix mentioned, the security domains are defined in ARINC 664 Part 5. These domains specifically apply to ARINC 664 networks, though the concepts can be applied to other networks. You also reference a Cabin Intercommunication Data ...


1

according to eurocontrol, http://www.eurocontrol.int/services/link-2000-programme: The LINK 2000+ Programme started in 2001 and is now in the full scale implementation phase governed by the DLS IR which requires: • All newly delivered aircraft operating above FL285 to be equipped as of 2011, • Core European ANSPs to be operational by 7 ...


1

These interesting posts do not answer the question of how many pings sent from the satelite were actually answered from the aircraft? The publshed data only talks about the last ping. The system is said to be automated with the satelite sending queries on a periodic basis, reportedly hourly. If each of these were in fact answered by the aircraft this would ...


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