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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86 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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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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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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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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168 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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135 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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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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216 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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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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144 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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107 views

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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183 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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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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151 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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168 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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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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Can the Class-E-to-surface airspace near Eagle County Regional airport (KEGE) and Marshall AAF (KFRI) be ignored when the tower is open?

Can 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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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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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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154 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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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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328 views

What is the primary reason that the non-towered airports KACV and KTLV 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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202 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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800 views

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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75 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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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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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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Why does this flight fly over Bangladesh, and not over Nepal and China? [duplicate]

Lately, I have been following flights flying eastwards from India. More often than not, I see them taking a longer route over Bangladesh and Myanmar, and not a typical parabolic route over Nepal and ...
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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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223 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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What is the purpose of this interesting pattern of class E airspace in northwest Alaska?

Perusing SkyVector today I noticed this airspace pattern: It can be viewed in more detail here. What immediately jumped out at me is that there are no charted airports in any of this airspace; the ...
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Where can I find US ARTCC sector boundary coordinates?

For an academic purpose, I would like to map US airspace using GIS tools with coordinates. I found the airspace boundary coordinates from the eNASR, but no luck with the sector boundaries. Any ...
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804 views

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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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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158 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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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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299 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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Can I fly through these military airfields' class C airspace?

I am a low time private pilot now based in Pensacola. I’m a bit unsure how the Class C of PNS/NAS Whiting Field is handled. As you can see they all overlap. PNS is a civilian field while the others ...
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Is this Class G Airspace?

So it's been about a decade since I got my private pilot cert and almost as long since I got to fly. My map reading is a little rusty. I'm trying to fly my drone at a local park and it's warning me ...
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What airspaces are the Florida Everglades? [closed]

If I'm flying through the Florida Everglades, what airspace would it be?