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controlled airspace wikipedia jump to content main menu main menu move to sidebar hide navigation main page contents current events random article about wikipedia contact us contribute help learn to edit community portal recent changes upload file special pages search search appearance donate create account log in personal tools donate create account log in contents move to sidebar hide top 1 classes 2 types toggle types subsection 2 1 control zone ctr 2 2 control area cta 2 3 terminal radar service area trsa 2 4 aerodrome traffic zone atz 3 see also 4 references toggle the table of contents controlled airspace 9 languages العربية dansk فارسی français bahasa indonesia 日本語 norsk bokmål polski türkçe edit links article talk english read edit view history tools tools move to sidebar hide actions read edit view history general what links here related changes upload file permanent link page information cite this page get shortened url switch to legacy parser print export download as pdf printable version in other projects wikimedia commons wikidata item appearance move to sidebar hide from wikipedia the free encyclopedia redirected from control zone airspace served by air traffic control not to be confused with area control center schematic representation of the main controlled airspace types and the air traffic control offices that respectively provide control service inside these airspaces controlled airspace is airspace of defined dimensions within which air traffic control atc services are provided 1 2 3 the level of control varies with different classes of airspace controlled airspace usually imposes higher weather minimums than are applicable in uncontrolled airspace 4 it is the opposite of uncontrolled airspace classes edit the international civil aviation organization divides airspace into seven classes from a to g in order of decreasing atc regulation of flights classes a to e are considered controlled airspace flight under instrument flight rules ifr is allowed in all controlled airspace and flight under visual flight rules vfr is permitted in all airspace except class a 5 6 name permitted flight rules separation provided services provided radio required requires atc clearance to enter class a only ifr all aircraft are separated from all others air traffic control service to all flights yes yes class b ifr and vfr all aircraft are separated from all others air traffic control service to all flights yes yes class c ifr and vfr ifr flights separated from all others vfr flights receive traffic information on ifr flights air traffic control service to all flights yes yes class d ifr and vfr ifr flights separated from other ifr flights and receive traffic information on vfr flights vfr flights receive traffic information on all other flights air traffic control service to all flights yes yes class e ifr and vfr ifr flights separated from other ifr flights all flights may receive traffic information when practical air traffic control service to ifr flights traffic information to vfr flights when practical yes yes for ifr no for vfr 7 types edit certain special types of controlled airspace exist to protect aircraft in the vicinity of a busy airport control zone ctr edit this section needs more citations please help improve this section by adding citations to reliable sources unsourced material may be challenged and removed find sources controlled airspace news newspapers books scholar jstor september 2025 learn how and when to remove this message a control zone is a volume of controlled airspace normally around an airport which extends from the surface to a specified upper limit established to protect air traffic operating to and from that airport because ctrs are by definition controlled airspace aircraft can only fly in them after receiving a specific clearance from air traffic control this means that air traffic control at the airport know exactly which aircraft are in that airspace and can take steps to ensure aircraft are aware of each other either using separation or by passing traffic information a ctr requires permanent radio contact while being in it and a clearance before entering certain activities such as making an approach landing and taking off also require clearances this implies that an aircraft flying in it must be equipped with a radio there are procedures for radio failures in the usa the term control zone is no longer used 8 and has been replaced by airspace class d typically it extends 5 miles in diameter with a height of 2500 ft agl above ground level around small commercial airports in the uk control zones are normally class d airspace and usually extend from the surface to 2000 ft agl they can be observed to be usually rectangular extending along the axis of the main runway although irregular shapes may be used where more complex airspace dictates this see liverpool and east midlands a control area cta is often placed between a ctr and nearby airways to give uninterrupted controlled airspace to airways arrivals and departures in germany control zones are a special type of class d airspace called d ctr the main difference to the regular german class d airspace is that within a ctr there is a minimum required cloud ceiling of 1500 ft agl 9 control area cta edit a control area is a section of controlled airspace that extends upwards from a specified limit above the earth which must be above 200m 700ft 10 and are established in areas where the density of traffic is high the upper limit of a control area is either when an air traffic control service will not be provided above or there is another control area above 11 a control area usually is situated on top of a control zone ctr and provides protection to aircraft climbing out from the airport by joining the low level control zone to the nearest airways in the uk they are generally class a d or e 12 a terminal control area tma is a control area established surrounding one or major airports at the confluence of airways it typically sits above each individual airport s ctr 13 terminal radar service area trsa edit in the united states a terminal radar service area is a section of airspace surrounding a busy airport where optional air traffic control services are provided it is designated as class e airspace 14 aerodrome traffic zone atz edit an aerodrome traffic zone is a small section of airspace defined around an aerodrome to protect the traffic departing or arriving the dimensions vary in the uk it is typically defined as 15 extending from the surface to 2000ft and with a radius of 2 5nm around the longest runway when the longest runway is longer than 1850m extending from the surface to 2000ft and with a radius of 2 0nm around the longest runway when the longest runway is shorter than 1850m see also edit airspace class prohibited airspace restricted airspace special use airspace terminal control area references edit canadian aviation regulations sor 96 433 part i general provisions subpart 1 interpretation government of canada archived from the original on 3 april 2012 retrieved 30 november 2016 phak chapter 15 pdf faa retrieved 28 september 2025 cite web cs1 maint url status link controlled airspace caa infringement tutorial retrieved 28 september 2025 canadian aviation regulations part vi section 602 114 general operating and flight rules transport canada archived from the original on 19 september 2012 retrieved 13 august 2012 tp 14371 transport canada aeronautical information manual tc aim rac 2 0 airspace requirements and procedures transport canada 11 april 2012 archived from the original on 18 february 2011 retrieved 13 august 2012 classification of airspace skybrary aviation safety skybrary aero retrieved 28 september 2025 classification of airspace skybrary aviation safety skybrary aero retrieved 28 september 2025 faa deutsche flugsicherung airspace structure visual flight rules in the federal republic of germany example archived 2018 12 24 at the wayback machine annex 11 to the convention on international civil aviation air traffic services pdf 15 ed international civil aviation organization icao july 2018 retrieved 28 june 2024 smith david 2021 air traffic control handbook manchester england crécy publishing ltd isbn 978 1 9108 0999 0 understanding airspace uk civil aviation authority www caa co uk retrieved 8 september 2025 terminal control area tma skybrary aviation safety skybrary aero retrieved 8 september 2025 institute pilot 1 february 2025 trsa airspace explained terminal radar service area pilot institute retrieved 28 september 2025 aerodrome traffic zone atz skybrary aviation safety skybrary aero retrieved 28 september 2025 v t e commercial aviation airlines airline codes airline holding companies cargo airline charter airlines flag carriers low cost airlines non scheduled airline passenger airlines regional airlines alliances oneworld skyteam star alliance value alliance vanilla alliance u fly alliance trade groups international aco atag iata iatan ifalpa istat united states a4a raa europe a4e asd eca ebaa era etwf other regions aaco aapa afraa raaa aircrew pilot in command captain first officer second officer third officer relief crew flight attendant flight engineer loadmaster aircraft pilot purser dead mileage airliner travel class first class first class travel business class premium economy class economy class basic economy class aircraft cabin aircraft lavatory aircraft seat map airline meal airline seat buy on board crew rest compartment in flight entertainment inflight smoking galley sickness bag airport aerodrome airline hub airport check in airport lounge airport rail link airport terminal airside pass airstair boarding domestic airport gate international airport jet bridge low cost carrier terminal runway transit hotel customs immigration arrival card border control internal departure card passport timatic travel document travel visa electronic environmental effects hypermobility environmental effects of aviation law air transport agreement air route authority between the united states and china bermuda agreement uk us 1946 1978 bermuda ii agreement uk us 1978 2008 cross strait charter beijing convention cape town treaty chicago convention convention on the marking of plastic explosives european common aviation area flight permit freedoms of the air eu us open skies agreement hague hijacking convention hague protocol montreal convention paris convention of 1919 rome convention sabotage convention tokyo convention warsaw convention intergovernmental organizations icao ecac eurocontrol easa encasia baggage bag tag baggage allowance baggage carousel baggage cart baggage reclaim baggage handler baggage handling system baggage sizer checked baggage hand luggage lost luggage worldtracer luggage lock aviation safety air rage air traffic control air traffic service aircraft safety card airport authority airport crash tender airport police airport security airspace 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air travel airplane film aviation taxation and subsidies mile high club steffen boarding method this aviation related article is a stub you can help wikipedia by adding missing information v t e retrieved from https en wikipedia org w index php title controlled_airspace oldid 1340692420 types categories air traffic control aviation stubs hidden categories articles with short description short description is different from wikidata use dmy dates from october 2021 use canadian english from october 2021 all wikipedia articles written in canadian english cs1 maint url status articles needing additional references from september 2025 all articles needing additional references webarchive template wayback links all stub articles this page was last edited on 27 february 2026 at 03 30 utc page was rendered with parsoid text is available under the creative commons attribution sharealike 4 0 license additional terms may apply by using this site you agree to the terms of use and privacy policy 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