Questions tagged [airspace]

Airspace means the air above a specific country (e.g. US airspace) but for aviation purposes it is usually divided into different types, each of which may have different regulations.

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4
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3answers
3k views

How do I find the floor of controlled airspace on sectional charts?

So, I understand finding floors and such when seeing something a fraction like 45/10 or 39/SFC, but I've been reviewing and gotten a couple of questions that look like this: What is he floor of the ...
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3answers
723 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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5answers
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Where can I get the FAA data that defines airspace, including MOAs etc.?

I was looking at http://www.gelib.com/aeronautical-charts-united-states.htm, where you can download shape files for Google Earth that show US airspaces. I'm writing some software that has a similar ...
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2answers
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Which altimeter setting is used to define airspace boundaries?

Let's say that we're flying VFR over the top of Class D airspace at 3,000 feet. The Class D extends up to 2,900 feet - we're above it, but just barely with a 100' buffer. We're also talking to ...
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2answers
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What is the primary reason that the non-towered airports ACV, TVL, SGU, BIH, and SIT/PASI have E4 extensions to E2 airspace?

NOTE-- this question is not about why it was desired to protect the airspace that ended up within the E4 "extensions". Rather, this question is about why that was done by designating that ...
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3answers
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What does the “T” on sectional charts mean in reference to airspace altitude?

These are present in the San Francisco class bravo / Oakland class charlie and O'Hare class bravo / Midway class charlie.
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1answer
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What do these double Class Bravo airspace floor and ceiling limits mean?

While browsing SkyVector I came across these double Class B airspace limits within the same section (is that what you call it?). I'm wondering what it means and what the difference is between this and ...
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1answer
98 views

Does this chart show a heliport in class D airspace without a control tower?

I was looking at the Los Angeles area on sky vector, and I noticed a tiny little triangular class D area right next to LAX. It shows that the height of the class D goes up to 2,500, but I couldn't see ...
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1answer
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In what airspace may gliders fly in clouds in the UK without an IFR flight plan and without contacting any air traffic control facility?

In what airspace may gliders (sailplanes) legally be flown in clouds in the UK without an IFR flight plan and without contacting any air traffic control facility? Also, how high does this class (...
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1answer
238 views

On the LAANC map for sUAS operations, why does the permitted ceiling drop to zero southeast of KGFL?

Above is a screenshot1 from the LAANC map for obtaining authorization to operate sUAS (model airplanes, "drones", etc), centered on KGFL, which is Floyd Bennett airport near Glens Falls NY. ...
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2answers
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If operating an ultralight with private pilot certificate, which rules apply?

If a holder of a private, commercial, or ATP pilot certificate operates an ultralight aircraft; and that aircraft is also equipped with the radios and transponders required by an airspace for GA ...
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847 views

Is it possible for a non-towered airport to have keyhole extensions Class E starting at the surface?

(skyvector.com, modified) The Springfield, OH airport, KSGH, is a non-towered airport with both precision and non-precision instrument approach procedures. To support these approaches, there are a ...
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2answers
116 views

Clarification on the SEA-TAC VFR map

I've been looking at the SEA-TAC VFR map, and something caught my eye... On this map one can see that the SEA-TAC airport has a class B designation in a strange inverse-rhomboid shape, surrounded by,...
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1answer
70 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?
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1answer
434 views

In reference to airspace, what does the FAA mean by “within the lateral boundaries of”? Is this construed to also imply a vertical limit?

Several FARs use the phrase "within the lateral boundaries of" (x airspace). What does the FAA interpret this phrase to mean? Specifically, what is the vertical extent of the airspace encompassed by ...
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2answers
832 views

What is the relationship between the code of an Area Control Center (US) and associated Flight Information Region?

From the wiki page, what I understand is an Area Control Center (ACC), also known as a Center (or in some cases, en-route, as opposed to TRACON control), is a facility responsible for controlling ...
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5answers
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Is it required to contact approach when flying VFR into a Class D airfield?

Is it required when under VFR to contact an airfield's approach when approaching to land at a class D? KDLH is my example airfield. They possess independent radar approach and departure (same ...
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2answers
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When is this Class D airspace not Class D airspace?

The Terminal Area Chart (TAC) shows the Class D airspace for Los Angeles International Airport (KLAX) view the full TAC. I have highlighted in green the north and south portions of the Class D ...
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On old sectional charts, what was the purpose of the domestic ADIZ regions and what was the difference between a “Defense Area” and an “Open Area”?

Looking at an old US sectional chart from 1956, I noticed a few oddities around where Air Defense Identification Zones (ADIZs) were placed. Compared to modern airspace where the US ADIZ is strictly ...
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0answers
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What are the pros and cons of PPL training at class C airport?

I'm looking to start PPL training soon, and the closest airfield is Austin-Bergstrom International, which is a class C. The only downside I see to doing training at KAUS is that the few PPL programs ...
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1answer
437 views

A question about FAR 91.225(e)(2) — pertains to ADS-B-out requirement and exemption for aircraft with no electrical system

This is a question about FAR 91.225 (requirement for ADS-B-out) and where aircraft with no electrical system will be able to fly. FAR 91.225 exempts aircraft with no electrical system from many of ...
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3answers
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When a Tower and the Approach Control closes who takes over the airspace?

When a Tower and the Approach Control closes, who takes over the airspace? and also what about When a Tower, within an Approach Control, closes, who takes over the airspace?
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4answers
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What is minimal altitude that aircraft (rocket?) can fly above any country without any permission?

What is minimal altitude that aircraft (rocket?) can fly above any country without any permission? I mean, at what altitude ends country's airspace?
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1answer
85 views

What training is required for a class B endorsement?

14 CFR 61.95 requires solo student pilots to have an endorsement to (a) fly through class B airspace or (b) takeoff/land at a class B airport. However, the requirements to get it are pretty vague: (...
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1answer
291 views

What is the difference between a waypoint and a significant point in an airspace?

I know ATS routes are made up of waypoints, but what are Significant Points used for? Is there a difference, or are they really just two names for the same thing?
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2answers
128 views

What purpose does a control area really serve related to managing air traffic flow?

I can understand that we have control zones at busy airports to streamline the flow of landing and departing traffic. But in Control areas of many airports i have seen that routes go straight through ...
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2answers
217 views

What is the meaning of “transition area” as used by the FAA? Has the meaning changed over time since the term was introduced?

What is the meaning of "transition area" as used by the FAA? Does it currently have a specific meaning? Does the FAA still use the term at all? Has the meaning changed over time since the term was ...
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1answer
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What regulations apply to flying near blasting areas in Canada?

I was flying near CYPK the other day and for convenience and since I was close to it, reported as being "above the blasting area". My instructor pointed out better not to do that. That made me think ...
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3answers
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Is a mode C transponder required underneath Class C airspace?

FAR 91.215 states that a mode C transponder is required for... all aircraft in all airspace above the ceiling and within the lateral boundaries of a Class B or Class C airspace area designated ...
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2answers
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How is the term “Coast” defined for FAA regulatory purposes?

14 CFR 91.1 defines the applicability of part 91. This paragraph defines two areas of jurisdiction where certain parts of part 91 apply: within the United States, including the waters within 3 ...
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7answers
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Can an IFR clearance be issued and flown through IMC in class G airspace?

Let's say an IFR flight was planned to depart from a non-towered airport with class G airspace extending from the surface to 700 feet AGL. The flight visibility and ceiling both go down to 0. Can the ...
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3answers
410 views

May the Class-E-to-surface airspace near Eagle County Regional airport (KEGE) and Marshall AAF (KFRI) be ignored when the tower is open?

May the Class-E-to-surface designation indicated by the dashed magenta lines outside the dashed blue circle at Eagle County Regional airport (KEGE) be ignored when the tower is open? Likewise at ...
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2answers
328 views

Do US state governors have jurisdiction over their airspace?

Do local governments have any control over their local airspace in the US. Could a governor singlehandedly close or restrict the airspace above his state? I know the FAA controls national airspace ...
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3answers
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What is the legal altitude to fly through Yosemite Valley (US)?

I have a question regarding flying in the Yosemite Valley national park, which I flew over last weekend in an open-cockpit gyroplane. The sectional states you must be a minimum of 2,000 ft about the ...
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1answer
144 views

What is the status of a bravo airspace when the associated TRACON is evacuated?

On 18 March 2020, an earthquake struck just south of KSLC, causing an evacuation of the control tower and TRACON facilities. The airport was closed. Later in the day, I found myself unable to ...
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1answer
439 views

Which airspace requires what RNP?

How do I know which airspace requires what RNP value? More specifically, can I go from NY to London with just BRNAV providing I stay above the NAT HLA?
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3answers
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Why does Class D overlap class B around SeaTac? …and other Seattle Bravo airspace strangeness

I noticed KBFI's class delta overlaps SeaTac's bravo by 500 to 700 feet. Does anyone know which tower the overlapping airspace belongs to? Does it classify as Bravo airspace and do you need to hear ...
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2answers
229 views

What class is the airspace at KGCN when the tower is closed?

I was wondering if someone could help me figure out how the airspace around the Grand Canyon National Park Airport (KGCN) works. The chart supplement here says: AIRSPACE: CLASS D svc 1 Jun thru 30 ...
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2answers
224 views

What is the floor of the class E airspace near KRHV when the tower is closed?

See the attached diagram snippet for KRHV in Northern California. The chart supplement says that when the tower is closed the airport surface is class G. At this time, what is the floor of class E in ...
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1answer
2k views

Why was the Iraqi airspace closed on 12 Mar 2020?

I was onboard BA105 on March 12, 2020 (London LHR to Dubai DXB), which was rerouted (I hope this is the correct term) to fly over Egypt. See the inflight map photo below: Close to arrival, the crew ...
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3answers
462 views

Is there a standard format to exchange airspace information in electronic form?

I am looking for information about airspace definitions. On maps they look great and a pilot has no problem reading maps and NOTAMs, but what about autopilots? Do they use some kind of standardized ...
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1answer
400 views

What is Lower Traffic Area (LTA) airspace in France?

In France, AIP ENR-2.1 subsection 2.1.2 defines airspaces of type CTA (control area), UTA (upper traffic area) and LTA (lower traffic area). I'm not familiar with LTA which appears not to exist ...
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2answers
274 views

What is the main reason why cruise flight in the transition layer is prohibited?

What is the main reason why cruise flight in the transition layer is prohibited? For example if we have a separation of 1000 ft between transition altitude and transition level, why should we not ...
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2answers
198 views

Can single engine aircraft fly in class A airspace?

A friend surprised me the other day by saying that single engined aircraft are not allowed to fly in class A airspace. I understand that the aircraft is under IFR in class A, with ATC clearance, (...
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1answer
374 views

What criteria are used to classify an airport as a satellite airport?

The AIM discusses services provided to satelitte airports of class C airspace. What determines whether an airport is considered a satellite? Distance, private or public classification, etc?
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2answers
486 views

Gas Venting Stations: What's The Big Deal?

On sectional charts you can see that, through various restrictions, regulators encourage pilots to avoid flying too close to Gas Venting Stations. These seem to be places where natural gas may ...
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2answers
711 views

What is Class E3 airspace?

I am not aware of Class e3 airspace that is now associated in an area I used to be able to fly my ultralight, model airplane, or drone. It is now apparently requiring FAA authorization.
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1answer
178 views

What is the altitude required to bypass Russia's airspace restrictions for airlines? [duplicate]

Given that Russia charges a lot for flights over Siberia from Europe to Asia, would flying above the Kármán line (100km) effectively bypass this restriction (from legal perspective) ? If not, what ...
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1answer
18k views

What is the minimum ceiling and visibility limits in Class E airspace?

With the intention of landing, taking off, or entering the traffic pattern at an airport in Class E airspace, what is the minimum ceiling and visibility as a VFR pilot in the USA.
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2answers
103 views

Vancouver FIR meaning

In looking at Garmin Pilot, there is something labeled "Vancouver FIR" which has 3 segments. It's located over the northern Cascades and to the east of the northern tip of Vancouver Island (Canada). ...

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