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Controlled airspace usually exists in the immediate vicinity of busier airports, where aircraft used in commercial air transport flights are climbing out from or making an approach to the airport, or at higher levels where air transport flights would tend to cruise. Some countries also provide controlled airspace almost generally, however in ...
A map showing the borders of the United States' flight information regions as well as that of Canada and other neighboring nations. Old Federal Aviation Administration airspace map of ARTCCs in the United States overlaid with what states they cover Flight Information Regions (FIR) of France FIR and jurisdictional airspace in Japan FIR and jurisdictional airspace in South Korea
Airspace [1] is the portion of the atmosphere controlled by a country above its territory, including its territorial waters or, more generally, any specific three-dimensional portion of the atmosphere. [2]
Airspace class is a category used to divide the sky into different zones, defined by both geographical boundaries and altitude levels. The International Civil Aviation Organization (ICAO) provides standardized airspace classifications that most countries follow. The classification dictates the level of control and services provided to aircraft ...
Control areas are established in any areas when the density of air traffic is high: [2] An airway is a case of a "control area or portion of thereof established in the form of a corridor". [3] Terminal Control Area is "a control area normally established at the confluence of ATS routes in the vicinity of one or more major aerodromes." [1] [3]
Area control centers (ACCs) control IFR air traffic in their flight information region (FIR). The current list of FIRs and ACCs is maintained by the International Civil Aviation Organization (ICAO). The following is the alphabetic list of all ACCs and their FIRs as of October 2011 [update] :
Map indicating location of the Shanwick OCA. Shanwick is the air traffic control (ATC) name given to the area of international airspace which lies above the northeast part of the Atlantic Ocean. The Shanwick Oceanic Control Area (OCA) abuts Reykjavík OCA to the north, Gander OCA to the west and Santa Maria OCA to the south.
Individual countries designate different portions of airspace as class G, e.g. in the UK, airspace above FL660 (Flight Level 660 or 66,000 feet) is uncontrolled and belonging to class G, [7] while in the US, any airspace above FL600 (60,000 feet) is designated as class E and therefore controlled. [8]