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A Flight Information Region (FIR) is an aviation
Aviation

File:Norwegian military Bell 412SP helicopters.jpgAviation refers to activities involving man-made flying devices , including the people, organizations, and regulatory bodies involved with them....
 term used to describe airspace
Airspace

Airspace means the portion of the atmosphere controlled by a particular country on top of its territory and territorial waters or, more generally, any specific three-dimensional portion of the atmosphere....
 with specific dimensions, in which a Flight Information Service
Flight Information Service

A Flight Information Service is a basic form of Air Traffic Control service which is available to any aircraft within a Flight Information Region , as agreed internationally by ICAO....
 and an alerting service are provided. It is the largest regular division of airspace in use in the world today.

Any portion of the atmosphere belongs to some specific FIR. Smaller countries' airspace is encompassed by a single FIR, larger countries' airspace is subdivided into a number of regional FIRs.






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A Flight Information Region (FIR) is an aviation
Aviation

File:Norwegian military Bell 412SP helicopters.jpgAviation refers to activities involving man-made flying devices , including the people, organizations, and regulatory bodies involved with them....
 term used to describe airspace
Airspace

Airspace means the portion of the atmosphere controlled by a particular country on top of its territory and territorial waters or, more generally, any specific three-dimensional portion of the atmosphere....
 with specific dimensions, in which a Flight Information Service
Flight Information Service

A Flight Information Service is a basic form of Air Traffic Control service which is available to any aircraft within a Flight Information Region , as agreed internationally by ICAO....
 and an alerting service are provided. It is the largest regular division of airspace in use in the world today.

Any portion of the atmosphere belongs to some specific FIR. Smaller countries' airspace is encompassed by a single FIR, larger countries' airspace is subdivided into a number of regional FIRs. Some FIRs may encompass the territorial airspace of several countries. Oceanic airspace is divided into Oceanic Information Regions and delegated to a controlling authority bordering that region. The division among authorities is done by international agreement through ICAO
International Civil Aviation Organization

The International Civil Aviation Organization , an agency of the United Nations, codifies the principles and techniques of international air navigation and fosters the planning and development of international scheduled air transport to ensure safe and orderly growth....
.

There is no standard size for FIRs, it is a matter for administrative convenience of the country concerned. In some cases there may exist a horizontal division of the FIR, in which case the lower portion remains named as such, whereas the airspace above is named Upper Information Region, or UIR.

An information service and alerting service are the basic levels of air traffic service, providing information pertinent to the safe and efficient conduct of flights and alerting the relevant authorities should an aircraft be in distress. These are available to all aircraft through an FIR. Higher levels of Air Traffic Advisory and Control services may be available within certain portions of airspace within an FIR, according to the ICAO class of that portion of airspace (with regard to national regulations), and the existence of a suitably equipped authority to provide the services.

See also

  • Airway (aviation)
    Airway (aviation)

    In aviation, an airway is a designated route in the air. Airways are laid out between navigation aids such as VHF omnidirectional ranges, non-directional beacons and Intersection s ....
  • Control Area
    Control area

    A Control Area is an aviation term that describes a volume of controlled airspace that exists in the vicinity of an airport. It has a specified lower level and a specified upper level....
  • Control Zone
    Control zone

    A Control Zone is an aviation term that describes a volume of controlled airspace, normally around an airport, which extends from the surface to a specified upper limit, set up to protect air traffic operating to and from that airport....
  • Terminal Control Area
    Terminal Control Area

    A Terminal Control Area or Terminal Maneuvering Area is an aviation term to describe a volume of controlled airspace set up at the confluence of Airway s in the vicinity of one or more major airports to protect traffic climbing out from and descending into the airports....