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 answers
625 views

Are any Q-codes still used in aviation?

On amateur (ham) radio, we often use Q-codes, which are three-letter codes starting with the letter Q with various meanings. They were originally used to speed up Morse code communications; it might ...
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Can a radio on VOX detect a loud tone and interpret as a cut on transmission (coming from pilot/cockpit)?

Can a radio using VOX detect a short tone and interpret it as a signal for cutoff of audio signal/transmission? this is A/G radio communication using a Schmid radio
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1 answer
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Tracking ATC communication with a flight of interest

I am a complete newbie, but hopefully this question makes sense. I am interested in tracking communication between a flight and ATC. I've found www.liveatc.net, but I have difficulties understanding ...
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2 votes
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What is the bandwidth of a 1090ES ADS-B signal?

I cannot find an official, trustworthy source on the bandwidth of the 1090 Mode S extended squitter ADS-B signal. It is not even listed in DO-260C standard. I've seen ranges from 50 kHz to 11 MHz (...
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Communication between airplanes

Hypothetically, can 2 airplanes (or rather 2 pilots) agree on a frequency that they know it's not used by any airport or service in the area and use it to communicate between each other, for whatever ...
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Why is there a short tone in the ATC recording that cuts the pilot transmission using VOX?

I had an experience of listening to tower-to-pilot conversation and noticed that there was a short tone in the audio stream that suppresses the voice/audio signal and causes muting on the recording. I ...
2 votes
1 answer
199 views

Can I use an aviation radio on the ground in an emergency?

Suppose I'm doing some plane spotting, and I see a dangerous situation that I think needs to be brought to the attention of a pilot or ATC (such as a tire falling off an airplane, an engine fire, etc.)...
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Could Apple Airtags interfere with aircraft communication and navigation systems?

German media reports that Lufthansa has banned Airtags in checked bags: This is specifically because of the transmission function. Lufthansa claims that the transmission function needs to be turned ...
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How common is QRM on air band radio?

How common is it for QRM to interfere with aviation radio, whether from multiple operators transmitting simultaneously, from an unlicensed transmitter, or from sources other than air band radios?
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3 answers
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Do pilots ever talk directly to each other over radio?

Do pilots ever talk directly to other pilots over air band radio, or only to air traffic control?
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3 answers
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How is expected approach time phrased in ATC communications?

For example, does an air traffic controller say the full phrase ("expected approach time XX minutes") or are there other conventions?
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When a parallel runway is closed at an uncontrolled field, does the notation change for the operating runway?

I’m currently a CFI/CFII/MEI at a flight school based out of Falcon Field (KFFZ.) Falcon has a pair of runways, 4/22 R/L. When the tower closes, runway 4L/22R is closed. During a training event this ...
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1 answer
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“X” letter meaning next to VHF frequency in jeppessen plates

DOH airport implemented new VHF frequencies in their new SID/STAR/APP jeppessen charts. What does the « X »letter means next to these frequencies
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1 answer
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What's an ESAT as filmed in "Top Gun: Maverick"

This is an image from the movie Top Gun: Maverick The scene in question is between 01:48:20 - 01:48:34 In the movie they're calling this device an ESAT, which is sending some signal which is visible ...
5 votes
2 answers
603 views

What would an ATC command telling a pilot to maintain a certain speed until a certain distance from the destination sound like?

For example, instructing an aircraft to maintain a speed of 200 knots until it is 10 nautical miles from the destination / runway threshold?
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Do these sound like plausible ATC communications (specifically in China, if that's relevant)?

Working on a small translation project that involves civil aviation. The setting is a Chinese airport. Same idea as my other question - Do these seem like plausible radio communication dialogue ...
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Do these phrases sound like actual things that could be said during radio communications between pilots and ATCs?

I'm working on some translations and want to make sure that I'm not making things up with the radio communications. Here are a few sentences I would appreciate help with. Bold font indicates areas I'm ...
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4 answers
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Can I ask ATC a radio check with a handheld radio?

I bought a handheld portable radio capable of transmitting in the air band and I was wondering if I can request a radio check to the ATC to see if the radio works properly. I know it's illegal to talk ...
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1 answer
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What's the difference between ACARS and ATSU?

I've seen ACARS and ATSU used interchangeably and I've seen references that imply they're different things (ATSU being Airbus only). How would I explain the difference to someone?
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How can I become a master at the radios?

Are there any resources for student pilots who wants to get better at the radios? Currently, I am immersing myself by using liveatc.com but what I am looking for is perhaps scripts between pilot and ...
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Can IATA Type B messages (Load, i.e., LDM and Movement, MVT) be transmitted and received over Aeronautical Fixed Telecommunication Network (AFTN)?

We, being the Air Navigation Services (ANS) operator, are providing and connected to Aeronautical Fixed Telecommunication Network (AFTN) network. We now want to received IATA Type B messages (Load, i....
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3 answers
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How to become a master at multitasking

I am a student pilot with 60 hours. The first 50 hours I received 5 years ago and the last 10 is what I have received within the past month. I need some advice: Throughout training My instructor ...
5 votes
1 answer
230 views

What license do I need to transmit on AirBand frequencies?

I am not a pilot, but at my company we are trying to figure out what FCC license we need to use to talk to our pilot when we are on the ground and they are flying. My research has led me to mixed ...
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What CTAF/phraseology should be used for non-airfield departures?

Assume a pilot has landed their aircraft on a body of water in a lightly populated area, though the question still holds for large grassy meadow. The time has come for them to depart. They're not on ...
3 votes
1 answer
346 views

What is 'dual monitoring' in radio communication?

I heard this word while local flying, and can't find any other results on internet. I only knew that 'monitoring a frequency' means only listenening to the selected frequency, rather than making a ...
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1 answer
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Why doesn’t ACARS just use HF if it has better range than VHF?

Why does ACARS default to VHF if HF has a better range? For example, when requesting ATIS from an airport, it will first try VHF, and if that fails, it will try HF. And if all hope seems lost, it ...
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1 answer
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Is there a designated air-to-air HF frequency in the USA?

Suppose I'm flying somewhere over the middle of the United States, happily telling stories exchanging important flight-related information with another aircraft on 122.75, the designated VHF air-to-...
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1 answer
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Responding to another aircraft without knowing their radio call sign

PPL student here. I recently had someone ask over the radio if there was any traffic in the pattern (uncontrolled class G airport). I could make out everything that pilot said except for his radio ...
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Why is communication between ATC and airliners not also written?

Reading this question: How often does a pilot ask ATC for a repeat? Most modern airliners' cockpits have plenty of digital displays. Why is communication between ATC and pilots not also typed/...
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4 answers
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How often does a pilot ask ATC for a repeat?

How often does it actually happen? Also, is it fine to ask them to slow down if it’s hard to understand, for example, due to a heavy accent?
4 votes
1 answer
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How to find ATC recordings for a May 8th general aviation crash?

Unfortunately this Sunday I had a friend and her husband who crashed and didn't make it. Would it be ridiculous to ask if anybody perhaps would know where to look for potential ATC recordings? I have ...
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3 answers
4k views

When told "call sign only" in a frequency change, how to transmit it?

For example: London Control says: BAW211 contact London Approach 118.1, call sign only. What will the pilot say to approach on 118.1? London Approach, BAW211. Or just: BAW211.
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Is "Conflicting Traffic" any better than "All Traffic?"

CTAF guidelines make clear that "all traffic in area please advise," is a bad idea and great way to get CTAF blocked for everybody. Makes sense, cool. I've seen in videos people using "...
3 votes
2 answers
260 views

Does the pilot flying always listen to radio communications?

When there is a pilot flying (PF) and a pilot monitoring (PM), does the PF always listen to flight deck radio communications? I would think Yes under normal conditions, but optionally No during ...
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3 answers
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Untowered communication when abeam the airport

Let's say I have the following diagram So, there's runway 28, and people take off straight out to the west towards the ocean. The runway is untowered and its right traffic for runway 28. When I'm at ...
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3 votes
4 answers
687 views

Did military aircraft in the sixties commonly lack VHF radios?

Investigating the XB-70 cockpit equipment, I notice that it only had (two) UHF radios, of the AN/ARC-50 model, for the 225–399.95 MHz band. No VHF radio that could be used to talk to civilian ATC or ...
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1 answer
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CAP 413: Callsign-first replies in UK RT procedure?

Taking a UK Flight Radio Telephony Operator Licence course and have fallen into a rabbithole. From CAP 413 edition 23 (the CAA's Radiotelephony Manual): 2.48 The placement of the callsigns of both ...
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1 answer
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What is the difference between CTAF and the Tower frequency? Why does the Chart Supplement list the same frequency twice?

At many part-time towered airports the Chart Supplement will have a listing along these lines: COMMUNICATIONS: CTAF 119.2, TOWER 119.2 (1400–0500Z‡) The CTAF is the same frequency as the Tower. What ...
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2 votes
1 answer
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Pilot communication with ATC partially unreadable

Can anybody decipher this pilot's landing request due to moderate turbulence (some unreadable words...). Thanks ! https://www.icloud.com/iclouddrive/03kDM9-xQ7Oyz3kUaeRJj6M5Q#AUDIO-2021-12-03-07-51-...
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14 votes
3 answers
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How to use/be an airborne relay

There are some cases where a pilot may not be able to reach ATC directly due to lack of power or being below the radio horizon: On a handheld backup radio After a forced landing Over open water In ...
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1 answer
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Is there a FAR reference for the IFR required reports listed in the AIM 5-3-3?

Section 5-3-3 of the AIM lists "Additional Reports" that "should" be made on an IFR flight. There are 9 of them in a radar environment and 2 more in non-radar. The only reference ...
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1 answer
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How do I request a frequency change to listen to ATIS?

If I only have one radio, and I'm using VFR Flight Following, what do I tell ATC when I want to pick up ATIS for the landing airport before I'm told to contact the tower?
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Did the last US plane to leave Afghanistan have support from the control tower?

CNN's says says that The last US military planes have left Afghanistan, Gen. Frank McKenzie, the commander of US Central Command, announced Monday at the Pentagon. The US departure marks the end of a ...
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4 answers
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Can the guard frequency be used by non-aircraft / general public?

I am part of an organisation which regularly flies high-powered rockets, and thus files a TFR when we do so prohibiting aircraft from the area where we launch these rockets up to 10,000 ft. This TFR ...
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1 answer
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Approaching a towered airport for landing but no specific pattern entry direction from atc

Here’s the scenario that happened to me - Flying into a busy class D, I contacted tower with the usual “XYZ tower, Warrior 12345 12 to the west at 2,500 full stop with Oscar” They respond “Warrior ...
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1 answer
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What is the procedure to change an airport's published CTAF?

Similar to the problem experienced by the poster at Why do so many airports have the same CTAF frequency?, I have noticed that my CTAF is crowded. Not with local pilots, but with operations as much as ...
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1 answer
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Do the soaring and/or ballooning communities in the US recommend 123.5 as the preferred frequency for air-to-air and air-to-ground use?

Does the soaring community (e.g. the Soaring Society of America) or the ballooning community in the US recommend 123.5 as the preferred frequency for air-to-air and air-to-ground use by glider pilots ...
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2 votes
1 answer
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Does the FAA or FCC recommend 123.5 as the preferred frequency for air-to-air and air-to-ground use by glider pilots or balloon pilots?

Does the FAA or FCC recommend 123.5 as the preferred frequency for air-to-air and air-to-ground use by glider pilots or balloon pilots speaking to other glider or balloon pilots or ground support crew,...
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4 votes
1 answer
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Why did the Soviets not make radio contact with Korean 007?

I was reading recently about the shootdown of Korean 007 and it is clear that it was very tense times between the American and Soviet governments. The one point which struck me as weird throught the ...
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Does ATC hear the same poor audio I hear on LiveATC?

When listening to air traffic control (ATC) communications on something like LiveATC there is a lot of feedback/static that often makes it difficult to hear. Do controllers hear the same feedback and ...
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