Search results
Results from the WOW.Com Content Network
The world's navigable airspace is divided into three-dimensional segments, each of which is assigned to a specific class. Most nations adhere to the classification specified by the International Civil Aviation Organization (ICAO) and described below, though they might use only some of the classes defined below, and significantly alter the exact rules and requirements.
The airspace class designation is in effect only during the hours of tower and approach operation at the primary airport; the airspace reverts to Class D if approach control is not operating, and to class E or G if the tower is closed. The vertical boundary is usually 4,000 feet (1,200 m) above the airport surface. The core surface area has a ...
If the airspace is not Class A, B, C, or D, and is controlled airspace, then it is Class E airspace. Class E airspace extends upward from either the surface or a designated altitude to the overlying or adjacent controlled airspace. When designated as a surface area, the airspace is configured to contain all instrument procedures.
Class E airspace is the airspace that lies between Classes A, B, C, and D. Class E extends from either the surface or the roof of the underlying airspace and ends at the floor of the controlled airspace above. Class E exists for those planes transitioning from the terminal to en route state.
The ICAO airport code or location indicator is a four-letter code designating aerodromes around the world. These codes, as defined by the International Civil Aviation Organization and published quarterly in ICAO Document 7910: Location Indicators , are used by air traffic control and airline operations such as flight planning .
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 ...
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
In the U.S., the airspace of a TCA is typically designated as class B. In the U.K., the airspace of a TMA is usually designated as class A, D or E. In Australia and New Zealand, "terminal airspace" is not used both in common vernacular or publication and legislation. However, the traditional structure of terminal airspace is present in Class C ...