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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164 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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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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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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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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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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145 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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187 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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182 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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123 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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399 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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1answer
163 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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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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Is the capacity of an airspace sector related to the number of routes it crosses?

I've been searching for data about the capacity of sectors for my PhD research but somehow can't find any...the only thing I found is the routes it crosses ....can we conclude that it's the capacity ...
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149 views

In the US, how does the distinction between E2 and E3/E4 airspace affect pilots?

In the US, practically speaking, how does the distinction between the E2 and E3/E4 subtypes of Class E airspace affect pilots?
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Question about federal airways in Class E airspace going from 5500 MSL(USA)

Class E with a floor of 1,200 feet AGL is shown with the "fuzzy" side of the blue. And sometimes Class E has a floor higher than 1,200 feet. They will print the floor of the Class E altitude in the "...
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To which airspace does the border of two adjacent airspaces belong to?

Consider two adjacent airspaces of different categories. For example, airspace G is up to 2500' and above this is an airspace D. The border is at 2500'. Which airspace are you in if flying at exactly ...
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230 views

When can airliners fly from Israel over Tunisia's and Algeria's airspace?

Per flightradar24, on August 25th 2019, an Air Europa Boeing 787 flying from Tel Aviv to Madrid flew over Tunisia's and Algeria's airspace. I thought flights departing from Israel or flying to it are ...
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373 views

Where does one request a VFR transition route through class B?

Other than staying outside class B until being cleared in, is the point where one requests a transition route important? For example, the SFO B coastline transition is shown as starting up at San ...
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158 views

What happens to a plane that goes to / from an enclave when the surrounding country closes its airspace?

When Pakistan closed its airspace, planes that had routes flying over Pakistan had to deviate around that country. What would happen to planes en route to or from Lesotho, if South Africa closed its ...
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126 views

What additional airspace will be off-limits to an a/c w/ no elect. system or xponder under 91.225 (ADS-B) compared to under 91.215?

Under FAR 91.225 (requirement for ADS-B-out), what additional airspace over the 48 contiguous states in the U.S. will be off-limits to an aircraft w/ no electrical system or transponder, compared to ...
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367 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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3k views

What is the difference between VFR Flyways, Corridors and Transition Routes?

What is the difference between: VFR Flyways VFR Corridors VFR Transition Routes I can find a Flyway chart on the reverse side of the TAC chart and also Transition Routes in the TAC chart. But where ...
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282 views

What is the difference between 'warning area' and 'ADIZ'? Are they overlapped with each other?

On FAR AIM, definition of warning area is Airspace of defined dimensions, extending from three nautical miles outward from the coast of the U.S, that contains activity that may be hazardous ...
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How may one notify the FAA of the apparent flaw in the airspace design at KEGE?

Several questions and answers have addressed the design of the airspace around KEGE. The situation is perhaps best summarized in this answer -- Can the Class-E-to-surface airspace near Eagle County ...
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202 views

May an ultralight vehicle pass directly above KEGE at 9200 MSL at 1600Z with no prior authorization without violating FAR 103.17?

May an ultralight vehicle pass directly above KEGE at 9200 MSL at 1600Z with no prior authorization without violating FAR 103.17? http://vfrmap.com/?type=vfrc&lat=39.643&lon=-106.916&zoom=...
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248 views

Does ICAO allow continued flight in RVSM airspace after a transponder failure?

If a civil aircraft's transponder fails in RVSM airspace, can it still be allowed to fly in RVSM according to ICAO? And could it be allowed to fly in class A airspace, according to ICAO?
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Is there a minimum weight requirement for flying manned aircraft in controlled airspace (B, C, D, E)?

The Colomban Cri-Cri is a small twin engine plane with an empty weight of ~200 lbs and a MTOW of ~400 lbs. Can I fly this in controlled airspace? What are the requirements for aircraft registration?
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To what FAA office or personnel should one direct an inquiry about the reasons behind the airspace design at a particular airport?

The airspace design process is extremely complex. See for example this FAA document, Order 7400.2M. To what FAA office or personnel should one direct an inquiry about the reasons behind the design ...
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188 views

What are the historical precedents of today's E2 and E4 airspace? (US)

What are the historical precedents of today's E2 and E4 airspace? From what previous airspace classes did these airspaces evolve? How do these precedents help us understand the significance of the ...
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What are E2 and E4 airspace?

We have a number of questions here about E2 vs. E4 airspace (see summary of links in this answer) but what does that mean? As far as I can see, neither the AIM nor the ATC Orders mention E2 or E4 ...
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189 views

What are all the US airports where E4 “extensions” change to E2 and become part of a larger E2 “surface area” when the tower closes for the night?

Of all the US airports with part-time control towers and with E4 "extensions", in which cases are the airspace definitions written so that the E4 "extensions" change to E2 and become part of a larger ...
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62 views

In the US, is there much variation among the various ARTC Centers as to where a SVFR clearance may be granted?

In the US, is there much variation among the practices followed by the various ARTC Centers and Approach Control facilities as to where a Special VFR clearance may be granted?
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In actual practice, do ARTC Center personnel generally follow the rule that a SVFR clearance may be granted in E2 airspace but not E4 airspace? (US)

In actual practice, in the US, do ARTC Center personnel generally follow the rule that a SVFR clearance may be granted in E2 airspace ("surface areas designated for an airport") but not E4 airspace ("...
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In the US, can airspace simultaneously be E2 and E4? What happens at KSTC to the airspace in the dashed magenta boundary when the tower closes?

In the US, can the same airspace simultaneously be E2 and E4? Consider the case of KSTC -- St. Cloud Regional Airport, MN. http://vfrmap.com/?type=vfrc&lat=45.546&lon=-94.059&zoom=10 On ...
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380 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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100 views

Measurement discrepancy on vfrmap dot com sectional — is the grid wrong?

At Nome Alaska-- KOME-- the E2 airspace (dashed magenta line) is listed as extending 13.2 (nautical) miles east of the airport-- according to this source page E-9 -- https://www.faa.gov/...
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89 views

Considering all US untowered airports, what is the furthest distance that E2 airspace (dashed magneta line) projects from the airport?

Considering all US untowered airports (50 states), what is the furthest distance that E2 airspace (dashed magneta line) projects from the airport for which it is designated? Measure from the middle ...
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163 views

Why are KACV and KTLV depicted differently on sectional charts than KSGU, KBIH, and KTPL, even though each is E2 w/ E4 extensions?

This question specifically is about non-towered airports surrounded by round circles of E2 airspace, with one or more "extensions" of E4 airspace that abut the E2 airspace. Therefore it is not the ...
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53 views

Has there been a recent change in the airspace configuration at KFYV— Drake Field near Fayetteville AR?

Has there been a recent change in the airspace configuration at KFYV-- Drake Field near Fayetteville AR? If so, where can we find an official description of that change? KFYV -- Drake Field airport ...
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What is the primary reason that the non-towered airports KACV and KTVL 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 airspace as ...
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236 views

Is it possible to get permission to fly a quadcopter around the St. Louis Arch for non-professional means

Is it permissible to fly a small quadcopter (<1 kg) around St Louis Arch for non-commercial means? If so what permit/permission is required?
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What's the difference between a Terminal Control Area and a Control Zone?

From what I've understood, in Canada a Terminal Control Area (TCA) is established at airports with a high volume of traffic to provide IFR control service to arriving, departing and en route aircraft. ...
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87 views

What requirements aren't met, that would designate an airspace to be Class E instead of A, B, C, or D?

Quoted from Transport Canada "Class E airspace is designated where an operational need exists for controlled airspace but does not meet the requirements for Class A, B, C, or D." Class A airspace ...
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198 views

Is mode C required for CVFR in Canadian Class B airspace?

(This is in reference to Canadian Airspace) Can you fly in Class B airspace under CVFR (Controlled Visual Flight Rules) without a transponder with Mode c (altitude encoding) capability? To enter ...
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Why would the Pakistan airspace closure cancel flights not headed to Pakistan itself?

The India-Pakistan feud has heated up again, with Pakistan closing its airspace as a result. I know many international routes fly over Pakistan, and that the closure would cause issues, but this ...
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165 views

Which international routes might save fuel and time by using a potential newly “deemed safe” North Korean air space?

The Reuters News item Exclusive: U.S. blocks North Korean air traffic revival ahead of Trump-Kim summit - sources says: If the space was deemed safe, international airlines could save fuel and time ...
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256 views

E class airspace(transition area)

Extension area(E airspace) shown as shaded magenta start from 700AGL but how to measure 700AGL over the water like in this picture? Cuz there’s no land…
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354 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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Where can I find approved entry/exit points for Free Route Airspace (FRA)?

How can I find approved entry/exit points for Free Route Airspace (FRA) in different countries?

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