Questions tagged [air-traffic-control]

Air Traffic Control (ATC) is a service of ground-based controllers that directs and coordinates aircraft to improve safety and efficiency.

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3 answers
226 views

Which countries use qfe field pressure?

I heard that acrobatic flight, Russians, Americans use qfe but is it always the case? Also why doesn't everyone use it? Isn't qfe field pressure better than qnh local pressure... Does a pilot ever use ...
-6 votes
0 answers
144 views

Air traffic controller personnel replaced by robots [closed]

Air traffic control Can Air traffic control personnel be fully automated replaced by robots? If No, Why?
1 vote
1 answer
491 views

What is the meaning of this information provided by Air Traffic Control? [duplicate]

Air traffic controllers seem to broadcast this information, is anyone able to tell me what this is or what its use is for? ...
5 votes
1 answer
98 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 ...
0 votes
0 answers
63 views

About the TRAFFIC INFORMATION SERVICE 's symbols

I got one simple question. In the above image, I know the non-threat traffic and proximity advisory meaning ( the first one means the intruder airplane is +- 1200ft above or below us or the intruder ...
7 votes
1 answer
2k views

Can I transition the airspace (pictured below) without 2-way communication?

If I wanted to fly over Beverly regional between 2600-3000ft, do I need to speak to anyone as I do so? I would be above the delta and below the bravo, but the sectional states I must ask for approval ...
14 votes
3 answers
5k views

What does "square the base" mean?

I was flying the other day and heard tower say to another aircraft, "square the base". What does it mean, and when might a controller say this?
12 votes
1 answer
1k views

Should I call ahead to land at a Class B airport?

I'm a private pilot, not instrument rated. I want to land at a Class B airport (New Orleans International KMSY, if that makes a difference), just for the experience of having done so. According to my ...
1 vote
2 answers
5k views

When is 'heavy' used in callsign?

I have heared at ATC communication that some aircraft uses a heavy word in the call sign. What does heavy means? When it is used? Is it used when aircraft is heavier than 200-300 tons?
2 votes
4 answers
426 views

Official way for tower to address all aircraft on frequency for new ATIS?

When there's new ATIS info available and the altimiter setting has changed, what's the official phraseology for making the announcement to all the aircraft on the frequency? I'm looking in the FAA ATC ...
0 votes
1 answer
54 views

What are dry and saturated lapse rates values or ranges for a rising or lowering parcel of air in degrees Celsius?

Environmental lapse rate average is rounded to 2 degrees celsius per 1000 ft.(Note that environmental lapse rate varies through the day).What about parcel of air lapse rate.? Dry lapse rate is a ...
2 votes
2 answers
151 views

While descending some pilots put local pressure long before reaching transition level?

Isn't this risky? I thought once they pass transition level they should change to local pressure... But is this not risky to put local pressure qnh before... risky in terms of separation wheter ...
15 votes
1 answer
13k views

How is Calculated TakeOff Time (CTOT) calculated?

This answer mentions: How these CTOT times are calculated is very complex, and deserves another question if you are interested. I'm interested. How does it work? What is the level of complexity ...
0 votes
1 answer
66 views

If while landing ,a surface inversion occured close to the ground would atc or atis know?

A change in temperature, pressure and many factors might happen in a surface inversion.Thus affecting landing performance and calculation.The local peessure might change suddenly as well...
2 votes
1 answer
72 views

Is there a benefit or advantage of decreasing the transtion altitude or transition level? [duplicate]

Some counrties have high transition altitudes and transition levels while other countriea have low ones.
5 votes
2 answers
4k views

If I get a speed restriction from ATC, at what point am I no longer obligated to comply with the restriction?

If a controller clears me for a procedure, and also says "...do not exceed ___ knots", how long does that restriction apply for?
3 votes
2 answers
495 views

When not cleared straight in for a VOR approach, how is this type of procedure executed?

You are flying to the GDM VOR on a 097 heading. The ATC clears you for the approach, but does not specify straight in. The procedure turn is marked by the barb and specifies remaining within 10nm. My ...
0 votes
2 answers
115 views

Who gives us transition level when it varies?

Who gives us transition level when it varies? ATC, ATIS, any others?
2 votes
1 answer
191 views

Why does DME colocated with VOR require more separation?

In earlier versions of ICAO Doc 4444 (Amendment 9 and earlier), two aircraft were deemed to be laterally separated if they were departing a VOR on radials which diverged by at least 15 degrees and if ...
14 votes
3 answers
6k views

Can non-instrument rated pilots request practice approaches?

I'm working on my instrument rating and wondering if I can practice ILS approaches without an instructor? Using a safety pilot, also not instrument rated, could I call approach stating VFR would like ...
5 votes
1 answer
509 views

Capturing of false glide-slope

I am curious to know a couple of things regarding glide-slope: How often do ATCs encounter flights capturing false glide-slopes? What is the response expected from ATCs in such a scenario? In other ...
10 votes
3 answers
3k views

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/...
6 votes
1 answer
226 views

How to "address" a flight plan to additional stations

Airspace around the Swiss village of Davos is restricted as part of the World Economic Forum every year. The amendment to the Austrian AIP instructs pilots who would still like to cross the affected ...
21 votes
4 answers
6k views

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?
7 votes
1 answer
256 views

Can air traffic control see control panel selections (I.e. FCU on A320 or MCP on B737)?

I have flown with a few captains that have told me that air traffic control can see the settings we set on the FCU (or MCP on B737): Is this actually correct? I'm aware that ATC can see what speed, ...
9 votes
2 answers
3k views

How did ICAO SARPS come to include the 250 knots speed limit for aircraft below 10,000 feet?

In certain airspace classes, a speed limit of 250 knots IAS is imposed for aircraft flying below FL100/10.000FT, according to the airspace classes defined by ICAO. How did this limit find its way into ...
2 votes
4 answers
287 views

Do pilots of modern high-end aircraft normally communicate their destination to ATC?

Do pilots of modern high-end aircraft ever verbally communicate their destination to ATC? My understanding is clearance delivery is done electronically and when listening to ATC I haven't heard any ...
4 votes
1 answer
634 views

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 ...
8 votes
5 answers
2k views

Has Air Traffic Control ever had to talk a first time pilot through a landing due to an emergency?

This question deals with the plausibility of the Hollywood cliché of a passenger on a commercial jetliner landing a passenger plane. My question is related but broader, and less hypothetical: Has ...
19 votes
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.
7 votes
3 answers
1k views

Does ATC react to pilot position reports?

Following previous questions on position reporting: When do pilots have to submit position reports? What are pilot position reports? Does Air Traffic Control somehow react to pilots submitting ...
20 votes
6 answers
9k views

What is the procedure when an aircraft with an emergency can't land due to a blocked runway?

This is a hypothetical scenario, but I'm interested to know if there are any regulations/guidance for what ATC should do in this situation. The hypothetical nightmare scenario: The runway is blocked ...
5 votes
3 answers
2k views

Are en-route ATC callsigns standardized?

I've seen different callsigns for en-route air traffic control, including Center, Radar, and Control (and Radio?). I suspect the only difference is the geographic location - Center in the U.S. (e.g. ...
16 votes
1 answer
7k views

What is "Director" in ATC?

On this question SentryRaven gave the following list of ATC stations: Delivery (if available) Apron/Ground (if available) Tower Departure (if available, sometimes handled by Approach) Enroute ACC/...
12 votes
3 answers
6k views

How do pilots/controllers deal with overlapping transmissions on the radio?

A disadvantage of the analogue radio1 used for communication is that it does not receive when it transmits. Everybody is trained to wait until the frequency is quiet before starting to talk, but it's ...
5 votes
5 answers
800 views

When an emergency happens, why do pilots need to stay on the current ATC frequency?

Per the below order, I need to stay with the initial ATC frequency during an emergency, what is the benefit to do so? What if the aircraft entered into the airspace controlled by anther ATC or the ...
16 votes
2 answers
3k views

How are light gun signals handled at remotely controlled airports?

In a comment @randomhead mentioned: Remote towers are already in use at several sites in multiple countries. Off the top of my head and without even googling, there's Leesburg airport in Virginia ...
6 votes
2 answers
235 views

Can ATC provide vectors and separation service to and between IFR aircraft in areas where radar coverage does not exist using ADS-B only?

In the U.S., can ATC provide vectors and separation service to and between IFR aircraft in areas where radar coverage does not exist using ADS-B only? If so, are the separation standards the same as ...
0 votes
2 answers
180 views

What is the vertical separation minima between IFR and VFR?

ICAO Doc 4444, 5.3.2 says The vertical separation minimum (VSM) shall be: a) a nominal 300 m (1 000 ft) below FL 290 and a nominal 600 m (2 000 ft) at or above this level, except as provided for in b)...
0 votes
1 answer
155 views

Is it possible to find out the actual reason for the diversion of V72578 of 15/04/2022?

There's a weird story making the rounds in the news in France these last few days: Flight V72578 on April 15th was delayed, and then diverted, supposedly because of the destination airport's curfew. ...
15 votes
4 answers
2k views

Where can the airspace boundary coordinates for Fayetteville TRACON be found?

I would like a map depicting the airspace owned by Fayetteville TRACON that includes lat/long coordinates (i.e. not just a cartoon-y outline with no information). Ideally, I'd like to find a site ...
99 votes
5 answers
22k views

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!
1 vote
2 answers
119 views

How strict is the relationship between ATC departure gates and SIDs?

I'm training to be an ATC on VATSIM, and the term "valid departure gate" is tossed about a lot, but not (to my perception) defined. Googling "departure gate" drowns me in ...
3 votes
1 answer
362 views

When must ATC give wind variation and gust?

In connection with takeoff and landing, ATC will give the current wind direction and velocity to the pilot. In some cases, ATC will also report the variation in direction and/or current gust (max and ...
-4 votes
1 answer
193 views

Two low flying large planes made bank turn - not on radar [closed]

On Thursday March 10, 2022, at approx. 7:30pm in Monroe, Connecticut, I witnessed two full sized planes following one another extremely low and then make an incredible bank turn. These planes did not ...
8 votes
3 answers
2k views

What bandwidth and availability is required for modern air traffic control?

A certain telecoms provider is advertising in the UK by showing off that you can operate air traffic control over it's home broadband service. Is this that surprising? I didn't think that air traffic ...
7 votes
2 answers
1k views

Can ATC issue instructions to exclude certain aircraft over international waters?

As an example, the Anchorage Air Route Traffic Control Center's sector extends all the way to the North Pole, far beyond 200 nm of the US coastline. Suppose that the US decides to "close its ...
0 votes
1 answer
270 views

What are the differences among ETO, ETA, and ELDT?

We are analyzing the Arrival Manager (AMAN) logs and would like to have an understanding of the difference between Estimated Time for Arrival (ETA), Estimated Time Over (ETO), and Estimated Landing ...
12 votes
4 answers
2k views

Does "Cross [FIX] at 250 knots" mean I have to maintain 250 knots after the fix?

If you are given the clearance to "cross [FIX] at 250 knots", does this specifically mean : 1 ) Cross fix at 250 knots, and then after [FIX] your assigned speed is 250 knots until otherwise ...
6 votes
2 answers
998 views

Why should you never squawk 0000 in the USA?

FAA Order 7110.66E says Code "0000" should never be assigned or used. and Code 0000 must never be assigned However, NASA recommends that crews set 0000 after landing to help detect when ...

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