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

25
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4answers
5k views

Where do extra planes come from?

Last night, I had to change planes at LAX because the United Airlines B737 that I was flying on had radio problems and thus could not fly over the ocean. One of the hi-frequency radios had problems, ...
6
votes
7answers
3k views

Best way of learning the aviation alphabet?

I want to learn the aviation alphabet, and when searching the Internet on how to, I see a plethora of approaches, so I thought of asking here! If it's primarily opinion based, let me know.
0
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2answers
114 views

Can you broadcast a very low power nav vor signal in air?

Are there any FCC restrictions on broadcasting a test nav signal on 108.0 in the air? Or perhaps on other nav frequencies that can be received within the navigation band?
0
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0answers
19 views

What exactly is Electrical length in Radio Frequency or EM waves [migrated]

What is electrical length in detail? Why is it so that 1/4 wave , 1/2 wave dipole antenna works properly and not a full wave antenna? What is the role of electrical lengths in degree?
1
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2answers
155 views

Who defines the callsign for radio communication? [duplicate]

I started flying with VATSIM and but I couldn’t find a proper answer to this question online. Who defines a callsign for a plane in a given flight? Is a callsign set to a airplane? Is it related to ...
3
votes
1answer
299 views

What, if any, are the rules on ATC politeness?

There are plenty of recordings available of ATCs acting impolite, in the linked video, the pilot says he will file a report about the conduct of the ATC. Would this actually result in any ...
1
vote
1answer
165 views

What is the procedure following a near miss?

This is a follow-up to this question - in particular, to this video posted in MichaelK's answer. What would be the correct procedure for the pilot to follow in this situation? (That is, after a near ...
4
votes
1answer
205 views

How to advise others of imminent danger?

In a case such as United 326 - where an aircraft got cleared for takeoff while other planes at the same time get cleared to cross that runway - how would an outside party that picks up on the mistake ...
8
votes
3answers
389 views

Why would a pilot on final to a towered airport not speak up when ATC clears another aircraft to land on the same runway, without mentioning them?

Every time I watch AOPA's Accident Case Study video Communication Breakdown, I'm left wondering. Here's an aircraft (in this case, '1DA) on final approach for landing on a towered airport, when ...
-1
votes
1answer
220 views

What happens if an ATC tower is completely disabled? [duplicate]

What is the procedure for aircraft, if the ATC they were relying on to land, is, in some way, completely disabled? (for example there is a fire that destroys the whole building and all equipment). If ...
2
votes
1answer
252 views

What is the vocabulary used by fighter pilots used to communicate?

As far as I understand, fighter pilots or more general military aircrews will use a dedicated phraseology to communicate with each other, which is different to communicating to ATC. Is this ...
3
votes
1answer
171 views

How do you calculate the range of a VHF transmitter that is on-board an aircraft?

I'm trying to calculate the range of a VHF transmitter on an aircraft output power 50W, frequency 130MHz, and reciever sensitivity of -100dBm. The calculations I have made give me ridiculously high ...
14
votes
2answers
3k views

Is it the tower's purview to recall an aircraft from the runway for loading the wrong cargo?

On August 17, Ryanair flight FR 11 entered the runway after already being delayed for 1.5 hours, only to exit at the first available opportunity. After being jokingly welcomed to Stansted from where ...
23
votes
3answers
7k views

What is your responsibility when a distraught pilot is on frequency?

I found the recent SeaTac incident with a suicidal pilot frightening. I myself remember being in very bad places mentally, and it got me to wonder what I should do if someone is on frequency, making ...
4
votes
4answers
434 views

Are the ICAO phonetic numbers used anywhere?

I ran across a table of ICAO (NATO) approved phonetic number pronunciations. As early as I can remember (50+yrs) in the United States "nin-er" is the only one I ever remember hearing in aviation and I ...
15
votes
1answer
2k views

What is the correct phraseology for "runway 03 R”?

What phraseology is normally used for "runway 03 R" by air-traffic control and pilots? A couple of possible options I came up with: runway zero three R runway three R runway zero three right runway ...
6
votes
1answer
166 views

Does a line up and wait instruction clear me to backtrack the runway?

I had an interesting occurrence at the start of a recent flying lesson, at an aerodrome with ATC service. We were holding at A and completed our power checks. We hadn't requested nor been offered an ...
46
votes
3answers
13k views

Is it OK to greet ATC?

My instructor told me that courtesies are forbidden in radio communication, however, we usually start conversation as "Turany Ground, OK-ABC, good morning, (... request)". I find it natural. Is that ...
23
votes
3answers
7k views

Why does the ICAO alphabet use “Charlie” for C?

Why does the ICAO alphabet use "Charlie" for C? Specifically, why choose "Charlie", which has a "Ch" sound, rather than a word with the hard "C" such as "Carl"? A cursory Googling turns up nothing.
3
votes
2answers
390 views

What is the ATC protocol for hijackings? [closed]

If a commercial aircraft is successfully hijacked, by a competent pilot / pilots, and they make contact with ATC for regular requests (i.e. weather updates, flight path information or clearing air ...
1
vote
0answers
99 views

How strongly is airband affected by severe thunderstorms in practice?

In light of this question I was very surprised to learn that despite operating on a higher frequency (108 MHz upwards) than the standard FM broadcasting, airband uses amplitude modulation (AM) instead ...
13
votes
2answers
512 views

Does an airline have to pay if fighters intercept one of its aircraft?

It sometimes happens that because loss of radio communication or because wrong frequency tuned in during ATC handover etc... a country has to send fighters to intercept an aircraft in its airspace. If ...
0
votes
1answer
70 views

What is the usual range of Approach and En Route ATC VHF radios? [duplicate]

I was wondering what is the regular range of Approach VHF radios used by ATC (normally 50W)? And what about En Route VHF radios (usually 100 or 250W)?
72
votes
4answers
11k views

How do civilian pilots and ATC verify that other people on the radio are who they claim to be?

I am interested in authentication - how identity is verified - in civilian aviation radio transmissions. I know that when someone is speaking on the radio he tells his call sign. But is there any ...
0
votes
1answer
550 views

Is there any source of live ATC audio with subtitles?

I'd like to know if there is a way to hear ATC and pilots' communications, with subtitles.
8
votes
1answer
244 views

How do I properly report sighting a drone or hobby UAV to ATC?

How would one go about reporting a drone (hobby UAV) sighted in the airspace of an airport on frequency, specifically to Tower? For example: I am doing patterns around the airport when to the ...
6
votes
1answer
181 views

If airports with pilot controlled lighting share a CTAF frequency, could the lights be triggered at multiple airports?

In the US, CTAF frequencies can be shared between several uncontrolled airports. That is, a pilot around airport A can hear the transmit of another pilot utilizing airport B. The question is can a ...
1
vote
1answer
121 views

When can a tower's callsign differ from the airfield name, and how do I find the proper callsign?

It seems like a lot of air traffic control towers use callsigns that are much different from the name of the airfield. For example, Lehigh Valley International (ABE) has "Allentown Tower." "...
0
votes
0answers
37 views

Does ATC also do blind transmission in loss of communication situation? [duplicate]

Since squawk 7600 doesn't necessarily mean that both voice-in and voice-out direction of radio communication fails, what is the ATC procedure in case an aircraft signalizes loss of communications? If ...
1
vote
0answers
102 views

Are there any aviation vehicles for Internet service?

Facebook announced on Wednesday (2018.06.27) that it is ending its Aquila drone program after four years of development. Aquila was a high-altitude platform station (HAPS) system designed to deliver ...
2
votes
2answers
107 views

Is there a recommended time to pause before transmitting, after changing to a new frequency?

Does any aviation authority have a recommendation of how long to listen after changing to a new frequency before making a transmission? source
-4
votes
2answers
193 views

ATC application to listen in to current flight? [closed]

I was wondering if there is some sort of app or website that allows people (well, me as a passenger) to listen in to the ATC of my current flight? (Assuming the flight has passenger wifi). If this is ...
3
votes
2answers
123 views

Is a ground station radio license required for UAS operations in the US?

When conducting UAS operations would a PIC or Spotter be considered a ground station or an air station? The communications would concern a sUAS in the air, but the radio is physically on the ground. ...
1
vote
1answer
262 views

What does “Last Call” mean on CTAF frequency?

At non-towered airports I sometimes hear pilot's using the CTAF use the term “last call” as they depart the traffic pattern. This is not listed in the AIM. What information is this suppose to convey ...
5
votes
3answers
217 views

Should I inform ATC about minor deviations to maintain VFR while on practice instrument approaches?

When talking to approach control for the purpose of performing practice instrument approaches in VMC with a safety pilot, the pilot (and safety pilot) is required to "maintain VFR." However, the pilot ...
2
votes
1answer
199 views

Are radio channels used by airliners half-duplex channels?

Can a pilot transmit and receive information at the same time? Or can he either transmit or receive but not at the same time? I thought communication channels were half-duplex because this reduced ...
1
vote
3answers
212 views

What to look for when purchasing a headset

I'm currently a student pilot, and I'm starting at an aviation university this fall to major in commercial aviation. Needless to say, I will be flying a lot. I'm looking to upgrade to a nice headset ...
-1
votes
1answer
210 views

Why do cathay pilots forget their flight number? [closed]

I hear so many times over frequency "cathay.. uh.. xxx" and always wonder if they have some kind of reason why pilots cant seem to memorize it.
7
votes
3answers
412 views

Is it possible for ATC to see who’s transmitting on the radio on their radar?

I don’t think ATC currently has the capability of seeing who’s actually transmitting on the frequency. If technology permits (probably by making a connection between the radios and the transponder), ...
5
votes
3answers
352 views

Flying VFR in uncontrolled airspace, what to do if one spots an apparently out-of-control fire on the ground?

Suppose I'm flying VFR in class G (uncontrolled) airspace, monitoring the local CTAF frequency while doing so. Maybe I'm alone in doing circuits around the local airport, or maybe I'm practicing ...
2
votes
2answers
132 views

Participating with “flight following”

What is the proper procedure for participating with "flight following" when leaving a non-control towered airport?
9
votes
3answers
2k views

When to switch from ground to tower frequencies at controlled airports in the US?

I have heard that you can switch to the tower frequency once you are at the runway hold line and are ready for takeoff without getting permission from ground control to switch frequencies. Is this ...
0
votes
2answers
149 views

Carrier frequency and transmit power of a commercial aircraft

I have a few questions on the radio comms. aspects of commercial aircrafts. At what (central) frequency does an aircraft communicate with a control tower? Is the communication over one frequency only?...
3
votes
1answer
81 views

When do I have to contact Centre when departing/arriving at an airport with an ATF?

I'm looking at St-Frédéric airport in Quebec, Canada (CSZ4) and specifically at the "COMM" section. It says that there is an Aerodrome Traffic Frequency (ATF) on 122.8 but it also seems to say that ...
1
vote
3answers
358 views

What are the radio characteristics of communications between tower and aircraft?

I have a few questions on the types of antenna used for tower-aircraft comms. What type of antennas are used today for tower-aircraft comms? Are they directional or omni-directional? What's the ...
6
votes
3answers
484 views

Can one “create” a private interpilot air-to-air frequency to chat?

I've been looking for an answer to this for the past couple of hours and can't find anything on the matter. (Yes, I've read this What radio frequencies are used for intercom in formation flying? , ...
3
votes
1answer
147 views

How many radio transmissions per hour occur on a given frequency over Europe and North Atlantic?

For one of our research projects, we want to simulate a north atlantic flight from Frankfurt, Germany to the U.S.. To make it realistic, we are also simulating air traffic control - both instructions ...
1
vote
1answer
117 views

How the Log Periodic Dipole Antenna of Localiser help in varying modulation depth?

Here Albert Helfrick speaks about 40% modulation depth for each tone in a localiser radio signal. However latest manuals of ILS manufacturers and google source speaks about 20% modulation depth, not ...
0
votes
2answers
126 views

What minimum radio communication equipment is required in a homebuilt aircraft in India?

Let's say I am building a single seat aircraft for flying in one's own country(India). What should be minimum set (Not only from compliance prospective but to have core set of communication for ...
16
votes
2answers
2k views

When replying to ATC, callsign first or last?

When I was in flight school, some instructor told me that it is the unknown ICAO standard that you should reply to an ATC call with your callsign first, like this: ...