Questions tagged [radio-communications]

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

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2
votes
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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3answers
1k views

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
937 views

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
2k views

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
657 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
1k views

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
331 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
884 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?
9
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2answers
921 views

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
124 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
858 views

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?
16
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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 ...
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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
6k views

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

Can you confirm whether this left-hand triangular pattern procedure can be used to report to ATC a distress situation? Is (or was) apparently used by US Navy (page I-7). Is mentioned in this UK ...
7
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1answer
1k views

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!
11
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3answers
9k views

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
2k views

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
735 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 ...
3
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4answers
35k 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
7k 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 ...
72
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6answers
13k views

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 ...
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1answer
306 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 ...
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5answers
15k 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(...
4
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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 ...
14
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2answers
2k views

How does ATC deal with a crew who is not capable of a clear pronunciation?

It probably is common guesswork to think that in nowadays' World we all speak English no matter what our mother tongue is. This should be even more the case with Civil Aviation, where everything is in ...
27
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3answers
3k views

What could cause an inadvertent squawking of 7700?

I get alerts whenever a plane squawks 7700, using a popular flight tracker application. It happens quite frequently that the aircraft, reported to squawk ...
19
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3answers
2k views

Lost radio communication after take-off in IMC - what are my options?

This might be "yet another lost comms questions", but I've tried to read a lot and there are different answers everywhere. Here's the scenario: (The flight plan as filed is - KSSI SSI V441 MONIA GNV ...
4
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1answer
380 views

Can aviation HF radios receive while transmitting?

I was listening to Gander Radio on HF at 5616 kHz today and I've noticed that operator at Gander would often start transmitting reply before the airplane finished transmission, as if trying to ...
2
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0answers
73 views

Why Black Boxes are not capable of transmitting its Critical Data directly to satellite? [duplicate]

Why don't airplane include a satellite technology to upload the critical (Voice/Engine etc) data recorded in FDR to satellite. This would be very useful, in case of missing FDR. Is there any ...
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2answers
5k views

How long before departure can an IFR clearance be copied?

When flying IFR under the FAA the departure procedure starts with copying an IFR clearance from ATC. My question is, how long before departure is it okay to go ahead and copy down the clearance? ...
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2answers
2k views

Where are the communications antennas normally located on general aviation aircraft?

In the past I have had instructors suggest that I use COM1 in the air and COM2 on the ground. The rationale was that most aircraft have the COM1 antenna on the belly making it favorable for air to ...
14
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2answers
838 views

How do pilots “turn an airport around” at nontowered fields?

Consider Homestead Airport, a fictional paved, non-towered airfield in the exurbs of Bigtown, USA that has become popular as a home field for recreational pilots. The airport's busy enough that ...
5
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2answers
1k views

As a passenger, can I use my handheld radio in commercial flights?

During flight from one country to another, can I use my hand held radio during flight to listen to ATC?
8
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2answers
5k views

What frequency should be used for air-to-ground communication other than airport ground operation?

On a VFR flight, what frequency should be used to talk to somebody on the ground in USA? In another word, if I am overflying my house and I would like to talk to the people on the ground, what ...
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2answers
555 views

What are good resources for learning more about communications? [closed]

As title says, which book/web site/etc.. are available for learning proper communication (for Private Pilot License)?
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2answers
5k views

What will air traffic controllers do when radio contact is lost?

When a pilot loses radio contact with ATC, there are standard procedures to follow, e.g. squawk 7600, observe the traffic pattern, observe the red / green light gun. On the other side, if a ...
18
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2answers
8k views

What does it mean when an airplane has the “super” call sign? [duplicate]

What does it mean if an airplane uses the "super" designation after their call sign on the radio?
4
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2answers
6k views

How does the PTT button on the radio work?

I've always seen a button either built into the yoke or attached to the yoke with velcro on older aircraft. However, the other day my instructor used an older-looking headset that had a push to talk ...
6
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4answers
2k views

How do pilot and copilot operate and coordinate the radio?

How do the pilot and copilot of a large commercial jet operate the radio when talking to ATC? Is there a push-to-talk button, or some voice-triggered mechanism? Also, how do they coordinate it? How ...
12
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3answers
9k views

How are squawk codes assigned?

How are the 4-digit squawk codes assigned to individual flights? This answer indicates that there should be a "correct" one. How does ATC know what is "correct" and what is "incorrect"?
5
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2answers
1k views

Is it ATC's responsibility to ensure read backs are correct?

I have experienced this a few times in the last couple of months. When the ATC assigns me a squawk code and I enter it in the transponder, a few minutes later when I try to reconfirm the squawk code, ...
11
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3answers
2k views

Why is it more difficult for ATC to manage a larger airliner?

After playing a few ATC simulation games, and reading at a few places (don't remember where), I am certain that it is more difficult to manage a larger airliner for the ATC. Suppose that one A320 and ...
5
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2answers
3k views

What is the meaning of these slang terms used in ATC?

I have heard some slang terms used mainly by ATCs: follow the black holes taxi not too deep how is your ride What do they actually mean and are there others?
5
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1answer
219 views

What are the effects of communicating on VHF/UHF on a RMI's ADF needle?

Say you've properly tuned an ADF station in COMP mode so that the BRG needle on your RMI is pointing towards your station. Then you tune the same ADF frequency on your V/UHF radio. Does anything ...
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2answers
1k views

Is it possible to do a Live-stream web cam on an airplane over the oceans? [closed]

Just wondering if this technology exists or has been attempted. For positioning purposes.
7
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1answer
5k views

When and why is the SELCAL (Selective Calling Radio System) check being performed?

When and in what scenario is the SELCAL (Selective Calling Radio System) check being performed by crew?
25
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3answers
7k views

Why are the call signs of some airlines completely different than their name?

The call sign of U.S. Airways is "Cactus", and that of British Airways is "Speedbird"; while for Malaysia Airlines is "Malaysia", Qantas is just simple "Qantas". Why is it that the call signs of some ...
16
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5answers
8k views

What callsign would a medical emergency flight use?

I see medical emergency helicopters taking off and landing several times a day from the hospital near my office. As I understand from an earlier question, they are probably flying VFR, below ...

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