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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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112 views

Does ATC use True Course or Ground Track?

Reading the practice questions for PAR, I came accross this ATC advises, "traffic 12 o`clock." This advisory is relative to your A) true course B) ground track C) magnetic heading I was ...
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0answers
128 views

How much does it cost the airline if an aircraft makes a missed approach? [duplicate]

aircraft go around due to variety of reasons viz. Bad weather (inevitable), unstable approach, ATC errors etc. knowing the cost implications will help in educating the stakeholders.
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1answer
730 views

What steps are needed to communicate with ATC on an A320?

In the description to this video, Captain Joe says that it took this inexperienced person 20 minutes to establish radio contact with ATC (in an A320 simulator). This seems like an awful lot of time ...
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1answer
83 views

Why doesn't a radar-equipped Tower say “radar contact”?

Most/all of the control towers in my area have radar displays, and I know from visits that it shows all the same things as in TRACON miles away--even aircraft on the ground. I hear them occasionally ...
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2answers
112 views

Why are waypoints not named uniquely?

Waypoint names are not unique. Why ? This is unnecessary (it would be possible to use unique names only). It introduces potential for confusion. So why are duplicate waypoint names permissible and ...
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2answers
120 views

If all aircraft were TCAS-equipped, how would this change ATC routines?

« The primary purpose of ATC worldwide is to prevent collisions, organize and expedite the flow of air traffic, and provide information and other support for pilots. » (source) If all aircraft ...
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2answers
134 views

Why are both ATC and TCAS tasked to prevent collisions although TCAS takes precedence anyway?

« The primary purpose of ATC worldwide is to prevent collisions [...] Many aircraft also have collision avoidance systems, which provide additional safety by warning pilots when other aircraft get ...
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1answer
81 views

What’s service does ATC service include?

As I’ve studied on ATC service and airspace class by referring to ICAO Annex, I have some doubts on ATC service. According to ICAO Annex 11, Class D airspace is defined as “IFR and VFR flights are ...
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3answers
280 views

Can pilots choose runway and landing direction?

Pilots normally receive landing clearance for a specific runway assigned by ATC. Absent an emergency, can pilots of commercial flights (depending on the wind conditions for example) choose a ...
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1answer
67 views

When flying commercial a/c form US to Latin America by GPS which agency controls the flight? [duplicate]

When flying internationally from the US to Latin America, the use of GPS is common. What agency or agencies control the flight and how?
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4answers
583 views

What would happen if I exceeded mach 1 over a regulated area?

What would happen if I exceeded mach 1 over a regulated area? Are there any penalties in place for this violation? Would ATC actually know I’m flying supersonic or would they have to go out of ...
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3answers
208 views

Can ATC terminate flight following AND approve (arbitrary) frequency change while still inside Class C airspace?

Unusual (for me) event inside Class C. Can ATC terminate flight following inside Class C and approve frequency change. Background: Requested and received VFR FF at 6500 msl prior to approaching ONT ...
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4answers
104 views

Will Tower repeat an initial heading if it's part of my IFR clearance?

If I get an initial heading to fly in my clearance from Clearance Delivery, but the Tower controller does not repeat the heading to fly in my takeoff clearance and I stay on runway heading, can the ...
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1answer
271 views

Heard on LiveATC that ATC wants to “cancel” something. What did the ATC mean by that?

Just heard this on LiveATC: ATC has cleared the pilot for an ILS approach ATC then said something to the pilot, to which the pilot replied, "Roger, will cancel with you on the ground, call sign." ...
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2answers
419 views

How unusual were MH370's final ATC exchanges?

There are 2 noteworthy occurrences in the ATC radio transcript within just minutes of a 3rd noteworthy, quite unprecedented occurrence in aviation history: At 01:07:55 MH370 unnecessarily reported ...
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1answer
62 views

Restore air traffic controllers' instructions from aircraft tracks

Is it possible to understand what commands had been given to an aircraft if you look at its track containing information about lat, lon, altitude, speed and course? Is there anyone who has already ...
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2answers
165 views

What emergencies or failures should I report to ATC? [duplicate]

During a flight, what kinds of emergencies or failures should I report to ATC immediately? For what kind of emergencies or failures am I not required to report them? What is the general rule? Could I ...
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2answers
430 views

On a flight with short stops, do you terminate flight following at each stop?

On a cross-country trip, is it normal to terminate FF at each stop and reacquire it (potentially just a few minutes later) for the next leg, or would ATC prefer that you advise them it'll be a short ...
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2answers
148 views

Is the whole world's airspace covered by ATC? [closed]

I'm an enthusiast and have only flown flight/atc simulators (on the VATSIM network). Obviously sometimes the airspace you are flying in is not covered by any ATC (so I have to set my frequency to ...
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4answers
6k views

Can ATC handle a flight as emergency although the pilots have not declared an emergency?

The preliminary report for the LNI610 crash shows how much distractive conversation there was between ATC and LIN610 at a time when the pilots clearly didn't have the aircraft under control – as ...
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2answers
197 views

How long can ATC operate for without main power? [closed]

This question pertains to large towers at large airports. I'm assuming there is backup power in case of a power cut / power failure. But how long does a typical reserve generator / unit supply power ...
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5answers
314 views

Why can’t air traffic control radars determine the altitudes of primary targets?

There are two types of returns that show up on an air traffic controller’s radar screen: Secondary returns are not, strictly-speaking, radar “returns” at all, but, rather, signals automatically ...
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2k views

Are there any publically available recordings of conversations between ATC and pilots?

It can be either audio or transcription. It would be perfect if it also contains aircraft tracks.
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1answer
183 views

When flying in uncontrolled airspace, which ATC frequency should I contact if I have an emergency?

Question 1: If I am flying in uncontrolled airspace and I have an emergency, should I report on 121.5MHz if no ATC is within line of sight communication (which means I cannot hear the ATC and the ATC ...
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2answers
1k views

Please explain real-world procedures behind this “ATC joke”

One of the well-known kind of the "ATC jokes" (funny excerpts from real or invented communication between pilots and air traffic controllers) has recently caught my eye. I can't seem to understand ...
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3answers
210 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 ...
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0answers
106 views

What is DPI? How is it Useful? And How does it work?

I have heard of DPI (departure planning information) status for a flight. I wanted to know what is this Status for? How is it computed or determined? What are the different status for it if any and ...
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1answer
215 views

What if the tower Is obstructed by clouds?

I know towers use radar to watch aircraft, obviously. But what about ground controllers? What if their view is obstructed by a low cloud level/fog? Is there such a thing as ground-based traffic ...
2
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1answer
59 views

Does a subsequent crossing restriction supersede earlier crossing restrictions?

Does a subsequent crossing restriction supersede earlier crossing restrictions? Here's an example. While flying the MIP4 arrival into KLGA, you receive the expected instruction to cross MARRC at ...
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1answer
173 views

Can paragliders communicate with ATC?

I am a private pilot looking to get into paragliding. After talking to some of my friends who do paragliding in the SF bay area and watching youtube videos. I noticed some fly through places like ...
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3answers
2k views

Reasons for significantly lower than normal approach

Not sure if this is going to be answerable to be honest, as I'm sort of asking for a bit of retroactive mind-reading! But here goes anyway! I was driving along Clifton Drive North, Lytham Saint Annes,...
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0answers
24 views

how to simulate the performance parameters wand EGT parameter?where can i get the data? [duplicate]

I went through a lot of research papers and (kind of) understood the parameters needed for Engine Condition Trend Monitoring. From what I've understood, I need N1speed,N2 speed, Pitch, AOA, Exhaust ...
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2answers
138 views

Is the Tower (Local) Controller responsible for “separating” VFR traffic in the pattern in the U.S. in Class D airspace?

For example, in U.S. Class D airspace, if an inbound aircraft operating VFR is instructed by the Control Tower to "enter left downwind for runway 18, report entering downwind," is the controller ...
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1answer
167 views

Is there a serious effort underway to move from a highways-in-the-sky approach to a mesh-network approach?

As far as I'm aware, there are certain "motorways" or corridors which air traffic uses, rather than navigating more directly from origin to destination. I remember listening to a documentary which ...
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2answers
111 views

Is vertical separation based on geometric difference or altimeter difference?

In the comments below one of the answers to this question about the influence of temperature on vertical separation, the question was raised whether ATC ensure 1000ft vertical separation based on ...
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1answer
115 views

Within the US: When, and by whom, is the Transition Level determined/published?

There are several SE Q&As that deal with the terms Transition Altitude, Transition Layer, and Transition Level. The very-brief, paraphrased definition of the Transition Level (TL) is: The ...
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3answers
3k views

In the US, is it legal to cover up some of the required gyro instruments during flight under IFR in actual IMC?

In the US, is it legal to cover up some of the required gyro instruments during flight under IFR in actual IMC? The purpose being for "partial panel" practice.
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1answer
51 views

Any ANSPs uses stack controllers?

The stack controller only controls one or two stack and release aircraft accordingly. Does any ANSP (air navigation service provider) provide this service?
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3answers
383 views

Can a general aviation aircraft be forced to land when crossing the airspace of a country?

I don’t know how to fly yet but my friend has a Cessna, he says it’s awesome to have and fly one and he also said he will take me for a flight one day. I have been researching and reading online and I ...
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1answer
182 views

In a part 91 formation flight within a mode C veil, are all the aircraft required to have their transponders on?

Two aircraft are planning on conducting a standard formation flight (aircraft remaining within 1 mile of each other) as follows in the U.S.: Maintaining VFR below 10,000 MSL; Remaining outside/clear ...
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1answer
99 views

What is the usual practice in interacting with ATC at Top-of-Descent? [duplicate]

Presuming an ordinary long-haul flight on which the plane's navigation system has selected a point as Top-of-Descent, and there are no particular issues (such as weather), when would ATC typically be ...
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3answers
238 views

What is the correct ATC phraseology for tower to clear a practice approach?

If you have an aircraft (training flight) that is doing practice instrument approaches and ATC is notified that they will fly the approach and then go missed, what is the correct phraseology for the ...
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0answers
42 views

Where can I find exhaustive and current list of ARTCC frequencies?

I found was http://www.milradiocomms.com/artcc_frequencies.html which refers to "update file which resides on the FAA's server". How do I obtain location of this FAA file?
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1answer
141 views

Is the ATC of the lower and upper areas of the Netherlands combined or segregated?

I am simulating the capacity of the Netherlands airspace by using the sector capacity. But I am wondering for different height, the capacity works for both or a single level. Therefore, I want to ...
3
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1answer
332 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 ...
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3answers
166 views

Can a controller be tasked to provide more than one ATC service at a time?

During a visit to one of the ATC Facility I found out that the Aerodrome Controller was also providing procedural approach control service along with aerodrome control service. Similarly, Area Radar ...
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1answer
173 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 ...
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1answer
223 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 ...
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3answers
455 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 ...
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1answer
301 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 ...