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
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1answer
170 views

Why didn’t AFR4590 use heavy in its call sign?

https://aviation-safety.net/investigation/cvr/transcripts/cvr_af4590.php shows that AFR4590 didn’t use heavy in its call sign even though Concorde had a MTOW greater than 300,000 lbs. Unlike BAW, AFR ...
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2answers
103 views

What are the proper radio call-outs on uncontrolled airfields?

I know that there are many non-commercial runways that do not have an active Air Traffic Controller on-duty, and that many small aircraft use these runways for takeoff and landing, but I never ...
7
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4answers
842 views

How are range and frequency related in HF communications? [closed]

How does the range of HF communications differ with frequency used? Is it less frequency more range, or more frequency less range?
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1answer
68 views

Portable radio for cockpit communication [closed]

I am a private pilot based at Van Nuys airport in Los Angeles. Recently due to traffic congestion we have to hold short for extended periods of time, 20-25 minutes. I thought to get a portable radio ...
2
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1answer
265 views

How do you figure out which frequency to contact approach on for a class bravo transition?

I'm about 20 hours into my PPL, so maybe I just haven't gotten to this part yet. Suppose I'm flying KFCM to KRNH and I want to request clearance across the bravo. How do I figure out which approach ...
7
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1answer
307 views

Question about congestion of the 1090MHz frequency

I'm no expert so there's likely to be a lot of mistakes in this post. ADS-B - Automatic Dependent Surveillance - Broadcast, (out) transmits (in) receives position data from/to other aircraft and to ...
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0answers
53 views

Where can I find canonical examples of radio communications at non-towered airports?

I'm trying to find any canonical examples of radio communication patterns at non-towered airports. The FAR/AIM has very little in terms of sample announcements, etc. The AC-90-66B (https://www.faa.gov/...
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2answers
74 views

Is the EASA RT License valid internationally?

I am planning to get a PPL license in Czech. As part of the PPL license I should get a RT License (in English, not Czech). Is that license is international? I mean, if I want to rent an Airplane in ...
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0answers
32 views

Volume differences between intercom and outside communications [duplicate]

While flying I can hear my instructor in my headset talking no problem, but when they (and me) are speaking with ground/tower the volume in my headset is much lower. Is there anyway to increase the ...
13
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4answers
3k views

What is the difference between “affirm” and “acknowledged”?

Recently, I've watched Air Force One and I heard ATC and the pilots say "Acknowledged." instead of "affirm" or "affirmative" as I've learned.. Is it common to say both? ...
6
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2answers
283 views

When must a pilot report Negative Contact?

Which regulation or AIM section specifically states when a pilot is required to report negative contact? It appears that different airports in the US have slightly different expectations. My ...
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0answers
77 views

What is the cause of blips on a VHF receiver?

A VHF receiver of aviation band tuned at 120 MHz receives unwanted blips like “tik tik” after every two seconds. Its located at airport. What could be the cause?
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2answers
168 views

Do aircraft carry commercial VHF radios?

Years ago, I was working in the bush and we used portable radios on something like 154MHz. When it came time for pickup, we were able to talk to the helicopter pilot on that frequency. Since it's ...
32
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4answers
5k views

What kind of assistance can another aircraft provide to an incapacitated pilot?

A recent incident unfolded as follows: An aircraft overflew the planned destination and did not respond to radio calls on any frequency. ATC decided the pilot might be incapacitated and asked another ...
8
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3answers
293 views

Why are lower VHF frequencies used for towers?

So, why are usually lower VHF frequencies (around 118MHz to roughly 120MHz) used for towers and higher frequencies (around 130MHz to 136.975MHz) for ACC? What is the advantage of using lower ...
2
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1answer
128 views

Is there a 'common courtesy' distance that should be complied with when initiating contact with ATC for class D airspace?

Some background: I'm a student pilot preparing for an upcoming stage check involving XC diversions and have been trying to visualize different scenarios of what I'd need to do when diverting. One case ...
32
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2answers
5k views

Should I contact ATC if I don't have a transponder?

The flight school I usually rent from is under the shelf of class C airspace. If you're going out to a practice area, the standard procedure is to contact approach control and get a squawk code, so ...
4
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3answers
883 views

How does ATC direct aircraft on ground from the parking to the runway?

For medium size airports, ATC will direct aircraft with a single message like this "Taxi to runway 29 via Papa, Sierra". I was wondering if it was the same thing for bigger airports (like ...
0
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3answers
273 views

How would fighter jets make contact with a previously hijacked aircraft?

For example, a plane is hijacked but civilians regain control, they know how to change the plane's frequency but no procdeures - i.e. dont know guard frequencies. There are fighter jets alongside who ...
0
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2answers
146 views

What are the other clearance and instructions that must be read back? [duplicate]

The following items must always be read back: ATC route clearances; clearances and instructions to enter, land on, take off from, hold short of, cross or backtrack on any runway; and runway-in-use, ...
2
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0answers
53 views

How can the 3M22 Zircon receive commands at high speeds?

According to its Wikipedia article, the scramjet-powered 3M22 Zircon missile is capable of achieving speeds of up to Mach 9, at which a plasma may be created around the missile. The article further ...
3
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4answers
1k views

When does ATC contact the pilot for a frequency change?

Usually, when the aircraft enters a new flight information region for example, ATC will ask the pilot to enter a new frequency. I'm curious about when they do. Is there a rule about it (in an IFR ...
16
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2answers
3k views

How do I know how to describe my position on the airport when I contact ATC?

When asking for taxi clearance, a pilot must include his location when contacting ATC. However, I'm not quite sure exactly how to state your position in the airport. For example, I've heard some ...
2
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1answer
50 views

What are the communication procedures for flying from one Class D airspace directly into another Class D airspace?

What is the communication procedure for descending through Class D airspace to land at a different controlled airport in a separate class D airspace that is directly next to it, such as Long Beach (...
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1answer
194 views

What is (or was) the “international frequency”?

I have recently read a book about Douglas BADER. This pilot has lost his legs (because of accident in 1931) but after (thanks to his single-mindedness) he takes up the "broomstick" again and became a ...
5
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1answer
177 views

Does pilot-controlled lighting work if you are interrupted by another voice transmission?

This question is in the context of pilot-activated runway lighting, which involves clicking the microphone e.g. 7 times to turn on the lights at night. I was wondering what happens when you are ...
10
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2answers
247 views

Can I use audio containing Canadian ATC/broadcast radio transmissions in a YouTube video?

I often record my flight training without audio and post some of it to YouTube. I would like to add in audio recording of what I hear and say over the radio as well, but my ground school suggested ...
4
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2answers
350 views

Can a VFR flight reference a waypoint in communication?

Can a VFR flight reference an IFR Waypoint when communicating position to tower or centers? For example: “N1234 at 3500’ at FERMY, request blah blah blah?” Thanks RHD! ****Adding additional ...
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1answer
100 views

What exactly are these frequency uses mentioned in the FAA's advisory circular on VHF use?

The FAA's document AC 90-50, (currently AC 90-50D) sets forth how the aviation communications frequencies (118.000-136.975) are allocated in the United States. Many of the assignment designations are ...
5
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1answer
2k views

What is the 'Deconfliction Service'?

High Speed Flights 2.36 - When receiving an ATS surveillance service, certain ex-military aircraft types have been granted a CAA exemption from the Air Navigation Order requirement to fly at an ...
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4answers
2k views

What is the purpose of using 8.33 kHz instead of 25 kHz frequency spacing?

What is the purpose of using 8.33 kHz instead of 25 kHz frequency spacing?
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2answers
5k views

What does ATC do during “slow” times?

I know at larger airports, it's NEVER a slow time. But what about at smaller airports that are large enough to rate manned ATC, but things aren't always fast-paced, high-traffic like at JFK or DFW, ...
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1answer
93 views

What are some alternate methods of communication with aircraft (specifically small drones)?

I've been thinking about his alot but I've yet to find an answer. Most of the time drones use radio, wi-fi, GPS and Bluetooth signals to communicate with their controllers but all of these methods ...
3
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3answers
207 views

How do you write 'to', 'then', or 'via' in IFR clearances shorthand symbols?

Although there are NO restrictions about the usage of shorthand symbols, still it would be useful when I fly with another person together, so I studied those symbols and got some doubt points. If ...
5
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1answer
497 views

What terminologies are used when ATC instructs a pilot to stop or proceed with his transmission?

If some pilot forgets to release his mic button, distracting everyone on the frequency, what terminology can be used by an ATC to stop it? And if another pilot stop transmitting his message until the ...
3
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0answers
195 views

Is there a specific reason Delta Airlines is allowed to have a call sign that's also code word in the NATO phonetic alphabet?

This is a followup to Is there any specific reason why Delta Air Lines doesn't have its own callsign? I was... "helpfully" informed that, um, actually, Delta Airlines does have its own callsign, it's "...
26
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4answers
7k views

Is there any specific reason why Delta Air Lines doesn't have its own callsign?

Many airlines have their own callsigns for use over the radio. A British Airways plane is called "Speedbird", US Airways was "Cactus", etc. So why doesn't Delta Air Lines do the same? It would seem to ...
2
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1answer
243 views

Why are the VHF and UHF airbands directly adjacent to frequency bands used by vital radionavigation aids?

Of the three main frequency ranges used by aircraft for radio communications (HF, VHF, and UHF), two (VHF and UHF) have their aircraft-radio-communications frequencies clumped together into a ...
13
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1answer
2k views

What happens if a crew complies but does not read back ATC instructions?

For example, a commercial airliner is inbound and is in the traffic pattern; ATC instructs the aircraft to reduce speed to 160 knots, which the airliner does. ATC notice the aircraft has complied but ...
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2answers
250 views

Is a cIearance only valid once it's accepted?

I've read somewhere that "a clearance is not valid until read back correctly," but I can't remember where or find a specific rule saying that. I understand some clearances can be accepted with "Wilco"...
2
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1answer
159 views

Why is VHF still used? [duplicate]

I have a rather easy(?) question. Why is VHF radio still the main communication method between the ATC and pilot? Is it because there is no better solution at the moment? Best regards
3
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1answer
134 views

How could I match the surrounding traffics displayed with their radio communication

If I have a traffic display I could see the traffics in proximity of my aircraft and meanwhile I could listen to their voice communication. So how could I match the traffic shown in the display with ...
6
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1answer
814 views

What are ATC-side procedures to handle a jammed frequency?

A few days ago, I was flying into my base airport in the USA with a control tower, and something/someone was jamming the frequency with what the tower thought was a hot mic after I had established ...
2
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0answers
97 views

Why would it be logical to call clearance delivery prior to CTAF during an instrument approach?

I am quoting this directly from the FAA's Instrument Procedures Handbook publication. "The communication strip provided near the top of FAA approach charts gives flight crews the frequencies that ...
3
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1answer
236 views

Do aircraft really have text communication over FMC?

I saw a photography that is obviously Photoshopped that sparked my curiosity Does aircraft have text messages transmission? Can text messages or text strings be transported over the air like ...
12
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1answer
277 views

How do you communicate with a military drone operator over radio?

This article (and other similar ones) states: In remarks at the White House on Thursday, US President Donald Trump said the drone had flown to within 1,000 metres of the USS Boxer and had ignored "...
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2answers
2k views

How do aircraft making HF transmissions avoid stepping on other HF users?

HF radio (High Frequency; the portion of the radio spectrum extending from 3 to 30 megahertz (MHz),1 although only some of this slice is available for aeronautical use) is the backbone of long-range ...
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1answer
137 views

When should I request clearance to return to altitude, after leaving cruise altitude?

I can not understand the term”cruise” perfectly. I know I should request ATC clearance to return to cruise altitude, if I leave cruise altitude to out side of the block. Ex) Cleared cruise altitude ...
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2answers
279 views

How feasible digital radio communications would be? [closed]

Its been over 100 years since we first flew and we still use analog radio with parasites and "radio effect" which changes your sound. Why don't we ditch the old system and make a mandate a new law ...
0
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4answers
243 views

Can ADS-B used for voice communications?

Everyone knows the radio communications doesnt sound great altough they work perfectly. But can the brand new ADS-B communications be used for carrying audio signal? Would it be clearer? The ADS-B ...

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