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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14
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3answers
701 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 ...
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3answers
359 views

Is there a practical use of streaming data received from meteorological sensors installed on aircraft?

I am not the practitioner in the field of aviation, and my knowledge is mainly theoretical. Therefore I would be happy to get a feedback from practitioners on the following topic: I was reading about ...
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3answers
2k views

Where does the transponder read altitude, or does ATC get it from radar?

When flying instrument approaches in a rented plane, Approach called out an altitude discrepancy between the assigned altitude which is being flown using the altimeter and the altitude being reported ...
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0answers
112 views

Can simultaneous departures be authorized from converging airports?

I am an ATC'r stationed overseas where we service two military airfields. The runways are 3 miles apart but converge. Our current regulations require aircraft from one airfield to delay in takeoff ...
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3answers
268 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 ...
3
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2answers
780 views

How can I get 'lead point' for aircraft to intercept final course?

As controller, I always wonder when should I instruct aircraft to turn. The aircraft does not turn at right angles as soon as instructed, but rather has turning radius. So, I tried to find the formula ...
0
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1answer
142 views

Maximum Altitude/Minimum Range limits of ATC PSR

I am trying to get an understanding of the ability of an air traffic control primary radar such as an ATCR-33 to track high flying targets (above 40,000 feet) at relatively close ranges (less than 15 ...
21
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2answers
2k views

Are controllers aware of TCAS RA taking place?

When the TCAS issues a Resolution Advisory (RA) which contradicts an ATC instruction, the RA takes priority. Are controllers aware (notified on their screen) that a RA has been issued between two ...
3
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5answers
314 views

Is a destination airport necessary for cross-country VFR departure clearance?

New flyer here. When you’re requesting departure clearance for a cross-country VFR, do you have to specify the destination airport to the controller, or can you just specify a direction (eg. “VFR to ...
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4answers
3k views

What is the relationship between your tail number and air traffic control?

Obviously a tail number is used to distinguish yourself from other aircraft, but after the first call, a callsign does the same thing. It is also used for investigation purposes I would imagine, by ...
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2answers
979 views

Does a military equivalent to civil ATC exist?

There are specific military ATC facilities, e.g. at military airfields, or temporary airstrips: Mobile ATC towers used by US Air National Guard’s for access to hurricane-devastated areas. Source: AAR ...
13
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5answers
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Could I issue clearances at a private airstrip without being a controller?

Hypothetically, if I owned a private airstrip on my property, with all the necessary permissions to do so, and I only want certain aircraft landing there, would I be allowed to issue takeoff and ...
22
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3answers
6k views

Is an aborted landing considered an incident for the FAA?

I was a passenger on a commercial aircraft on final approach into Salt Lake City. As we desended to approximately 1000' the pilot suddenly gunned the engine, climbed and aborted the landing. He then ...
10
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2answers
300 views

Why doesn't ATC use a unified frequency for the same control area?

If you have experience of getting flight following or flying instrument in the US, you might have noticed that approach and center controllers alternate between two or three frequencies for the same ...
8
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2answers
1k views

Who closes an airline's IFR flight plan and when?

ATA (Air Transport Association of America) defines the various flight phases (ATA Spec 2300, flight phases). The last phase is called Flight Close and is described as "The Flight Close phase begins ...
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7answers
3k views

Do you say prefix K for airport codes in the US when talking with ATC?

I'm a new student, and I see the US airport codes on charts with the K prefix, e.g. KORD for Chicago O'Hare. I have always seen on commercial flight booking sites, only the last three, letters such ...
20
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2answers
4k views

Is it bad practice to say my callsign first in a transmission to ATC?

Usually ATC is saying the callsign of the plane he speaks with first and then starts with the actual transmission. Pilots usually say their transmission first and end it with their callsign. However, ...
13
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4answers
9k views

What is the meaning of “altimeter three-zero-one-one”?

I've been listening to a lot of liveatc.net recently (mostly at CYVR). What does it mean when the ATC give an "altimeter" reading (usually around the 3000 area). Altimeter three-zero-one-one. I'm ...
5
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2answers
2k views

When may I change my transponder code to 1200 when being handled by ATC?

When am I allowed to change my transponder code to 1200? Is it after clearing the boundary of regulatory airspace (ie. airspace requiring radio contact and an operating transponder)?
9
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2answers
495 views

Does the FAA or FSS check or authorise IFR flight plans?

There is an existing question about VFR flight plans the answers to which suggest that FSS dont check these and the main purpose of filing GA VFR flight plans is to aid subsequent S&R efforts. ...
4
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1answer
782 views

What dialogue would a crop duster typically have with ATC?

By Stefan Krause, Germany (Own work) [FAL], via Wikimedia Commons What is the exact dialogue a crop duster pilot will have, if any, with ATC on a routine flight?
8
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2answers
321 views

Is prior clearance into Class B airspace revokable?

I was piloting outside of Class B airspace in an area well known for being difficult from which to contact ATC via radio because of mountainous terrain. When I did get cleared into Class B, I was only ...
15
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1answer
3k views

Who manages International Airspace Traffic?

For example, if a plane is flying from Amsterdam to Miami and is in the middle of the ocean, who manages that traffic? The ARTCC? Or the airplane just flies without communicating for some hours until ...
6
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2answers
2k views

What are the differences between radar flight following and traffic advisories?

In typical usage, the terms seem to be used interchangeably. However, aircraft must be transponder- or encoder-equipped for traffic advisories to be possible, for example. What information does each ...
9
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3answers
2k views

How does ATC handle changing QNH/altimeter values?

Obviously for aircraft arriving to or departing from an airport/airspace (as relevant), they listen to the ATIS and/or are given the QNH. But what happens if that pressure changes? Even a fairly ...
24
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3answers
40k views

What is a TRACON?

What is a TRACON or Terminal Control? When do pilots need to be helped by a TRACON? Where is it usually located and what is the difference between TRACON, En Route and Tower?
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4answers
2k views

When to turn base at towered airport?

When at a towered airport and instructed to make "left pattern for runway 3," am I supposed to wait for the base leg turn until tower clears me for landing? This seems to be the norm, but I can't ...
17
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3answers
2k views

Restricted Area “popping up” around you — can it happen, and what do you do about it?

What happens if you are flying along through a Restricted Area (lets assume you're in a J-3 so you're VFR/no transponder, but you have a handheld radio to talk to ATC with) and said restricted area ...
5
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5answers
766 views

How much “power” do ATCs really have?

After reading this question about being cleared to go faster than 250kts in airspace that otherwise has a speed limit, I began to wonder how far can Air Traffic Controllers (ATCs) can bend the rules ...
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4answers
2k views

What is the best way to give ATC a position report using only a VOR (no DME or GPS)?

While cumbersome, is it permissible when asking for a pop-up IFR clearance to state, at the intersection of WWW radial XXX and YYY radial ZZZ? Obviously, during ...
27
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5answers
10k views

I accidentally deviated from an ATC instruction as a student pilot. How bad was it?

Here's the scenario: I was a student pilot on inbound for landing at my home airport on my final solo cross country flight I needed before doing a checkride. At roughly 8 miles out to the north west, ...
27
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5answers
17k views

Which ATC instructions should be repeated back by the pilot?

AIM 4-4-7 (b) says: Pilots of airborne aircraft should read back those parts of ATC clearances and instructions containing altitude assignments, vectors, or runway assignments as a means of ...
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3answers
67 views

Can “Center” provide VFR flight following?

Whenever I've requested VFR flight following, I've always requested it from So Cal Approach/Departure because I'm usually flying within their reach. If I'm flying outside the reach of So Cal Approach ...
10
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2answers
2k views

What are the duties of an ATC supervisor?

We know that each air traffic control facility has a "supervisor", a person who is "in charge of the controllers", so to speak. What exactly are the duties of the supervisor? Here are some of the ...
4
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3answers
2k views

How should I request flight following when I'm not taking a direct route to my destination?

I want to plan a flight from KMSN - KDAY. My plan avoids the ORD airspace as much as possible, so something like: KMSN - JVL - KARR - JOT - EON - KRZL - OKK - MIE - KDAY What would be the ...
8
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2answers
3k views

What is CENRAP?

According to the AIM, in class B and C airspace separation of VFR traffic is "suspended during CENRAP operations": Separation of VFR aircraft will be suspended during CENRAP operations. Traffic ...
23
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2answers
6k views

How do airplanes maintain separation over large bodies of water? [duplicate]

I have read that the oceans are big enough that ground radar stations only reach so far out. I assume that means after a certain distance from the coast they leave ATC services. Do airplanes employ ...
5
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2answers
619 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." ...
5
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3answers
791 views

When (if ever) can ATC order an aircraft to go around?

Can ATC order an aircraft to go around if there is a tailwind? Or should ATC give the pilots the current wind information and let them decide whether to go around or land?
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 ...
6
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2answers
268 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 ...
9
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6answers
426 views

If I'm cleared to land without any specific instructions on how to enter the pattern, what should I do?

I learned at an uncontrolled airport. I thought I had controlled communications down pretty well, but I upset the tower controller today. Situation: I was coming from the southeast, and tower told me “...
4
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1answer
340 views

What is black routing and red routing?

In a meeting with aviation experts, the terms black routing and red routing were discussed. What are they? From the discussions I was able to put together that either the TMU (Traffic Management Unit) ...
14
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1answer
12k 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 ...
14
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2answers
3k views

How does handover between Air Traffic Controllers work?

I have a questions about air traffic control. I understand how the controllers monitor and direct aircraft on their intended routes while maintaining clearance distances to other aircraft and ...
0
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2answers
177 views

What is an Air-Filed Flight Plan? Are aircraft capable of filing flight plan when in flight?

ICAO Doc 4444 mentions to input AFIL in the departure field of flight plan if it has been filed in the air. What is an Air-Filed flight plan? Can aircraft crew file a flight plan in-flight? If yes ...
7
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1answer
69 views

Why should lower limit of a Control Area (above 3000 ft) coincide with a VFR cruising level?

In ICAO Annex 11 it is recommended: When the lower limit of a Control Area is above 900 m (3000 ft) MSL it should coincide with a VFR cruising level Why should it coincide with a VFR cruising level?
3
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2answers
451 views

What are the meanings of these terms used in ATC ground communications?

Regarding ATC ground communications, what/who are the following callees? Are these aircraft, or vehicles, or people? [Airline name] maintenance [Airline name] tug [Airline name] mechanic
16
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2answers
3k views

How can ATC distinguish planes that are stacked up in a holding pattern from each other?

If I understand holding patterns correctly, several planes stack up vertically, each circulating at its assigned altitude until given permission to exit the pattern and enter an approach for landing. ...
13
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3answers
4k views

What is the procedure when being vectored for an approach and ATC allows you to pass through the final approach course?

If you are on a heading, being vectored to intercept final on an instrument approach, and it appears that you will fly through the final approach without being cleared to intercept it, what should you ...

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