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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5answers
2k views

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
4k 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 ...
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2answers
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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 ...
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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
63 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
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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
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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
2k 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
266 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 ...
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4answers
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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?
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2answers
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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
8k 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
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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 ...
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3answers
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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 ...
18
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1answer
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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 ...
20
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3answers
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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
128 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 ...
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3answers
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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
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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 ...
8
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2answers
327 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
8k 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 ...
18
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1answer
38k 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?
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2answers
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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
489 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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3answers
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In what ways do air traffic controllers communicate with pilots in class A airspace?

I know they use two-way radio, but is that the only communication pilots receive from air traffic controllers? Also, in general in class A airspace, how often do pilots hear from air traffic ...
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2answers
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Are pilots legally required to verbally declare an emergency to invoke §91.3(b)'s deviation authorization?

Related:Do you have to explain what your emergency is? I am aware that pilots are required to declare an emergency and inform ATC of as much information as possible during IFR flight due to this rule:...
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8answers
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Is it bad form to call “ready to depart” when you know you won't be cleared yet?

My local aerodrome is towered and has parallel hard and grass runways. Simultaneous parallel departures or landings are not normally allowed. On one occasion we had been instructed to "line up and ...
4
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1answer
792 views

What dialogue would a crop duster typically have with ATC?

By Stefan Krause, Germany (Own work) [FAL], via Wikimedia Commons What is the exact dialogue a crop duster pilot will have, if any, with ATC on a routine flight?
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2answers
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Can I land at an uncontrolled airport under class C without talking to ATC?

In this situation, I would be flying from Richmond Executive-Chesterfield (FCI) to New Kent Co (W96). Can I land at an uncontrolled airport under class C without talking to ATC? Picture source: ...
10
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1answer
375 views

Do aviation intercoms have a standardized compatibility with radio stacks?

I have been seeking an intercom unit for a Cessna 172N that has four seats but only two headset jacks, and I would like my rear passengers to be able to communicate without yelling. Aviation ...
10
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1answer
938 views

How do large drones communicate with ATC?

For large drones like the Reaper, X-47, and aircraft like that, how do the "pilots" communicate with ATC when they need to?
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2answers
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How can I find the location and coverage of aviation VHF transmitters?

In the USA, is there a way to find locations of VHF transmitters that are used for air traffic communication, and the frequencies they transmit/receive on? There are some places (Northern Bay Area, CA)...
4
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2answers
132 views

What is the difference between COM and Auxilary COM signals?

when the aircraft navigation system is tuned to VHF COM frequency (118-137.990MHz) then COM receiver will able to receive two types of signals one is COM signal and the other is AUX COM signal what is ...
3
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1answer
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Why couldn't the DHL611 crew hear the ATC transmissions for the Bashkirian 2937 crew?

In the mid-air collision over Uberlingen, why couldn't the DHL611 crew hear the instructions given by the controller to Bashkirian 2937 crew if both aircraft were on the same frequency?
21
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1answer
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How do airline pilots contact their company while in the air?

Sometimes airline pilots need to get in touch with their company while in the air, for example diagnosing cautionary messages or reporting a diversion. By what means is the communication channel ...
26
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3answers
4k views

How do I get attention on a busy radio channel?

As I understand it (I'm not a pilot), radio communications are a more-or-less first come first served proposition. If I'm in busy airspace with near constant communication between ATC & aircraft, ...
27
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2answers
7k views

Does air traffic control identify a distress situation when an aircraft flies triangles in the sky?

There is an account in a TSB Canada investigation report after a loss of radio and transponder: The emergency procedure to be followed by a pilot to alert radar stations when in distress and unable ...
7
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1answer
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Why are aircraft callsigns pronounced over the radio in a non-phonetic alphabet way?

Why is it numbers are not always pronounced in a phonetic way? For example a flight number of 2390 is pronounced "twenty-three ninety" instead of "two three niner zero"
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5answers
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When should a pilot use the word “takeoff?”

I've been taught before that the word "takeoff" should only be used when reading back a clearance, and that when requesting a clearance pilots should advise "ready" or "ready for departure." Here's ...
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5answers
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Why is “Affirm / Negative” used instead of “Yes / No”?

Does anyone know why we use Affirm and Negative in RT, rather than Yes and No? I assume it's to prevent confusion with accents and other languages - but Yes and No sound very different to me!
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3answers
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What are the guidelines for call signs for aircraft dealing with US ATC?

Suppose a general aviation aircraft is operating VFR under part 91. When they call ATC they'd normally use their tail number as the call sign. Something like "November 1-2-3 Foxtrot Uniform." What if ...
10
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3answers
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How to start an approach in IMC loss of communication under IFR?

Suppose I lost my radio communication while en-route, I am following the cleared route to the last fix. I am flying the higher of my last assigned altitude and MEA. Then, I am holding at my last en-...
3
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1answer
857 views

What is the expected range of handheld radio?

For a handheld VHF radio carried as an emergency backup, how should I expect the effective radius of a handheld radio to compare with on-board radios in two-way communications? I figure reception ...
4
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4answers
45k views

What is the true meaning of the word “wilco” when used on the radio? What is its origin?

Pilots often learn to use the word "wilco" on the radio through contextual interpretation. During my experience as a pilot communicating on the radio I have often observed pilots using the word "wilco"...
11
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2answers
9k views

What is the true meaning of the word “roger” when used on the radio? What is its origin?

When pilots learn to talk on the radio they can generally learn that the word "roger," when used on the radio, is a way to acknowledge that a message was received. What is the textbook definition of ...
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6answers
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What happens if a language other than English is used over the radio?

In many non-English speaking countries, communication with ATC may be conducted either in English or the native language. Famous examples are China, Russia, France and possibly Germany. When a pilot ...
2
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1answer
307 views

How high does a jet have to be to hear its radio call? [duplicate]

I am a student pilot and I am learning about radio signals/communication. I am studying for a test and a practice questions states: You are flying circuits at a small airport and are flying at ...
29
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5answers
18k views

Why is the quality of radio communication bad?

Why don't modern planes and ATC centers have good-quality audio for communication? For example in this video: Or basically any other example of pilot communication(...
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1answer
3k views

When is an aircraft handed over from Center to Approach?

I'm trying to understand how an IFR flight an ACC (center) controller communicates the hand over to the pilot to contact local airport frequencies. I tried listening LiveAtc but my English is not so ...

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