Questions tagged [radio-communications]

Radio is the primary way that pilots communicate with air traffic control and with other aircraft.

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7
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2answers
2k views

How are multiple frequencies monitored at once?

In a tiny single-engine aircraft like a Cessna, all the way up to a modern jetliner like a 747, it seems the cockpits of modern aircraft have at least 4 separate airband radios, for monitoring up to 4 ...
6
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3answers
2k views

How does the modulation of the transponder work?

The transponder works in PCM (pulse code modulation): how does it work in the transponder? I can find explanation of what PCM is, but not if the signal sent from the transponder antenna is digital or ...
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6answers
12k views

Why do military pilots report “gear down” during their traffic calls?

I've noticed that military pilots will often say something along the lines of: <airport> traffic, Basher 5-2 left base, full stop, gear down. Why the additional "gear down" call? Shouldn't it ...
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0answers
50 views

How do interceptors communicate with the airplane crew when the radio is dead? [duplicate]

A week ago an airplane lost the radio connection to the tower due to technical difficulties in German airspace (article in german). Thats why interceptors started to escort the plane and to check if ...
2
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1answer
265 views

Does two-way communication failure include one-way communication failure?

Code 7600 means lost communication, more specifically two-way communication failure. I wonder whether two-way communication failure means losing the capability of maintaining two-way communication or ...
4
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3answers
426 views

How could a light or buzzer on the ground be triggered from an aircraft?

I work at a Skydiving company in New Zealand and we are looking for a light switch or buzzer that is triggered in the plane and can effectively alert the staff on the ground that the plane is 3 ...
6
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1answer
990 views

Why was “taxi into position and hold” changed to “line up and wait” in the USA?

How come taxi into position and hold changed into "Line up and wait?" Did the old phraseology cause misunderstandings, or did it seem dated?
4
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3answers
855 views

Which specific version of English are international pilots and ATC required/recommended to learn?

Are international ATC and pilots technically required to learn British English, American English, or something else? I've heard it said that they are "supposed to speak ICAO standard phraseology, ...
3
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1answer
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What do “LC/P” and “PTD” stand for in reference to airport communications?

When I pull up the Colorado Springs (KCOS) Airport Comm frequencies in Skyvector or in FAA database there are some frequency listed as "LC/P" and "PTD". Would someone explain what those acronyms stand ...
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1answer
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When flying to a towered airport when the tower is closed, what frequency should I use?

The attached picture shows the Rapid City Regional Airport, KRAP. If I arrive after KRAP's tower is closed, which frequency should I use: 125.85 or 122.95?
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1answer
938 views

Is it legal to listen to aviation frequencies in the UK? [duplicate]

Am i allowed to purchase an ATC scanner and listen tho what is being said in the control tower? Thank you
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2answers
3k views

FL(Flight Level) vs Altitude [duplicate]

in my radio book i came across this communications. Control: "Pacific 800 report passing FL 150" Aircraft: "Pacific 800 Wilco"... "Pacific 800 passing FL150". next. Control: "Fiji 58 ...
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2answers
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What is the distance at which my VHF communication radio can reach ATC?

I just installed 2 new TKM MX11 radios and a new Garmin 340 audio panel. I also put in new coax cable and 2 new antennas in my 1964 Skylane. What kind of distance from ATC should I expect at 4 or 5 ...
14
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2answers
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How do mixed-bag-of-hardware military coalitions handle communications, IFF, et. al. interoperability?

Back in the Cold War era, there were Western-allied air forces on one side using NATO-standard communications and IFF equipment, and Warsaw Pact-allied air forces on the other side using Soviet-...
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4answers
936 views

What are the most common uses of radio communication when flying? [closed]

What are the most common uses of radio communication in aviation? I know that many aviators communicate with the people in towers with radio, but what do pilots say to the people in the towers and ...
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2answers
544 views

What will be in 'radiotelephony privileges' part of EASA PPL without practical RT examination?

My question is addressed to pilots who recently obtained PPL in Europe (preferably in Czech Republic, but not so important). As I understand, EASA itself does not require separate radiotelephony ...
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1answer
1k views

How can I test a COM VHF antenna?

I have an older VAL 760 TSO COM radio. Twice now the radio has blown an internal radio fuse on transmit. VAL has tested and certified the radio as "Good", but advice that the cable or antenna could be ...
8
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1answer
2k views

Why do some pilots misuse (troll) the GUARD frequency?

When flying I almost always monitor GUARD, VHF 121.5 on my second communications radio. It's almost a daily occurrence that I hear someone transmit the words "work work work" or a long, theatrical "...
7
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1answer
684 views

What is a transmit-only frequency?

I found the above in the Jeppesen Airport Chart Legend. What would be an example of a transmit-only frequency? Is it related to Flight Service Stations? If so, how? Where can I find an example for ...
3
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1answer
766 views

Is an RT license required for EASA PPL holders?

Is an RT (radiotelephony) license required in the EU for an EASA PPL holder acting as PIC in an EU-based aircraft?
4
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1answer
1k views

Is there anything better than LiveATC to get accustomed with RT phraseology?

I would like to "train my ear" for RT communications and I tried to listen to approach of Dublin's Airport. I simply can't understand more than 50% words because of loud background whistle and poor (...
63
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2answers
15k views

How was I able to just plug in my headphones and listen to ATC and pilot chatter?

I was travelling from Mumbai to Newark Liberty Intl on United Airlines 49, a Boeing 777-200. I was sitting in the economy section, last row, last seat to the plane's left, basically, I was literally ...
6
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1answer
10k views

How should a loss of communications in VFR be dealt with?

Let's say I'm flying a cross country flight and I wanted to land in a Class D or enter Class C towered airport, but I lost my two-way communications radio but have my transponder squawking 7600. ...
16
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1answer
8k views

What is the night effect?

I read the night effect takes place in radio navigation, especially VOR and NDB. My questions are: What is its nature? Why does it occur? What are the consequences of it?
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1answer
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Are CTAF and UNICOM frequencies routinely recorded?

ATC communications are recorded for later examination by accident investigators or regulatory agencies. Are CTAF frequencies at untowered fields usually recorded? How about manned UNICOM frequencies?
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5answers
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Is there a solution to radio interference?

I was reading about the Tenerife Disaster and came across what seemed to be the probable cause behind the accident. A simultaneous radio call from the Pan Am crew caused mutual interference on the ...
11
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1answer
3k views

Can general aviation use UHF to contact ATC?

In the US, if a civil aircraft has a UHF radio are there any regulations against it performing ATC communication on the UHF bands? Pointers to the appropriate CFR's would be appreciated. This ...
15
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2answers
2k views

Do transoceanic airliners monitor marine VHF emergency frequencies?

I know that modern jetliners often have a multitude of radio equipment on board, including VHF, HF, satellite, etc. From what I've read (such as here), it's customary for jetliners to monitor 121.5 ...
11
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2answers
2k views

What callsign should an ultralight use?

I plan to operate an ultralight aircraft domestically (in Oregon, USA) in uncontrolled airspace and will not venture out of the country nor will I come near the Canadian or Mexican borders. I have ...
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0answers
62 views

Is a radio call required when vacating an altitude after being given a discretionary descent? [duplicate]

When operating a flight under these conditions: In the USA Under the FAA jurisdiction Given a descent with pilot's discretion by controller Operating on an IFR flight plan Is a radio call required ...
8
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2answers
2k views

How does a flight or squadron communicate when radio silence is in effect?

By MSgt. David N. Craft [Public domain], via Wikimedia Commons How does a flight or squadron communicate when radio silence is in effect? If one pilot spots an unexpected target or danger, how is it ...
5
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3answers
2k views

From which ATC station is push-back clearance requested?

When parked at the gate that requires a push-back onto the taxiway, from which ATC station is the push-back clearance requested? Is this the ground or apron station, or is that still departure ...
10
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3answers
1k views

When are ATC frequencies preset in the radios?

I've noticed that sometimes pilots tend to present the next ATC frequency in the standby radio, and when required to switch frequencies, they can just push the frequency transfer switch to switch the ...
4
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1answer
241 views

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 ...
24
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4answers
8k views

Is it legal to use handheld radios to listen to aviation frequencies in the USA?

Is it legal to use handheld radios to listen to (general aviation) airport frequencies in the USA? Can I go to an airport with a handheld radio and listen to their frequencies?
5
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2answers
5k views

How to check if (small) aircraft's radio is working properly?

Is there a standard way to test/check aircraft's radio without calling anybody (Ground/Tower) to see if it is receiving and transmitting? Is there a way to check aircraft radio with your own ...
7
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1answer
5k views

What's the meaning of underlined frequency in sectional chart nav aid box?

There is a statement to describe the underlined frequency in legend, it says: Underline indicates no voice on this frequency. What does this mean? We still need to ident the Morse code, doesn't it?...
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2answers
6k views

When do pilots actually use ‘wilco’?

I know it means “I have understood the instruction and will comply.” However, any instruction that is a clearance, concerns runway use or contains altitude/level, heading, speed or squawk code ...
19
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3answers
5k views

How is the ATC language structured?

Is the content of spoken communications used by air traffic control and pilots defined as part of a rigorous language definition? Such as a morphological or lexical foundational system, or is ...
15
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1answer
17k views

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 ...
20
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3answers
7k views

How should I establish initial contact with ATC after being handed off by another controller?

What is the proper way to contact a new air traffic control facility after you have be instructed to do so by the controller you are currently interacting with? As a practical example: Here in ...
4
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1answer
121 views

Is there a system of automated sharing of current (experienced) weather between aircraft in flight?

For example, if say - Aircraft 1 is flying a certain route, being followed by Aircraft 2 at an interval of say, 5 minutes (over the same position). Is there a system by which Aircraft 1 can transmit ...
11
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2answers
1k views

How can a sUAS operator contact ATC/identify themselves when contacting ATC?

In a comment, abelenky offered some words of wisdom which I personally agree with regarding sUAS ops near a surface Class C: When in doubt or close, call Tower and state your intentions. They'll ...
11
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2answers
2k views

Do glider pilots require normal headsets?

When flying light aircraft, we use headsets which include ear protection from the noise of the fan. Being that unpowered gliders are presumably much quieter, are the same headsets used? My assumption ...
7
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1answer
261 views

Is prior clearance into Class B airspace revokable?

I was piloting outside of Class B airspace in an area well known for being difficult from which to contact ATC via radio because of mountainous terrain. When I did get cleared into Class B, I was only ...
4
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2answers
2k views

Is there a database of radio-frequencies for airfields/airports in Europe?

Is there something like a register of frequencies for airfields/airports in Europe? I am building a VFR flight planner and would be interested to autofill a form with the frequencies dependent on the ...
14
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2answers
5k views

How does ATC know if you have been assigned a squawk or not?

Departing VFR from class D airspace, either you can request flight following after you leave the airspace or you may ask the airport ground/tower and they assign you a squawk code and setup the flight ...
16
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1answer
29k views

What is the meaning and difference between CTAF, UNICOM and MULTICOM in the US?

What is the meaning and difference between CTAF, UNICOM and MULTICOM in the US? Could you please give examples of radio communications with the correct phraseology to be adopted in each case?
25
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2answers
36k views

Are “Kennedy Steve’s” various jokes allowed in ATC communications?

Forgive me if there is an obvious answer to this, but I was just listening to this “Kennedy Steve” playlist, and he seems to joke a lot more than most ground controllers I’ve listened to. I have ...
2
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1answer
443 views

Why is wireless avionics intra-communications (WAIC) not used for air-air or air-ground communication?

Since ITU approved the use of WAIC systems, aircraft designs have evolved and benefited greatly from fuel consumption savings, reduced maintenance (by removing/replacing costly and heavy cable wiring ...

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