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The International Civil Aviation Organization ('''ICAO'''), an agency of the United Nations , develops the principles and techniques of international air navigation and fosters the planning and development of international Air Transport to ensure safe and orderly growth. The ICAO Council adopts standards and recommended practices concerning air navigation, prevention of unlawful interference, and facilitation of border-crossing procedures for international Civil Aviation . Assad Kotaite has served as President of the ICAO Council since 1976 , but will retire from that post in August, 2006 . In addition, the ICAO defines the protocols for Air Accident Investigation followed by transport safety authorities in countries signatory to the Convention On International Civil Aviation , commonly known as the Chicago Convention . See NTSB , TSB , AAIB , BFU , and BEA . Its ''headquarters'' are located in the '' Quartier International '' of Montreal , Canada . The ICAO should not be confused with the International Air Transport Association (IATA), a trade organization for Airline s also headquartered in Montreal. ICAO CODES Both ICAO and IATA have their own airport and airline code systems. ICAO uses 4-letter Airport Codes , and 3-letter Airline Codes . IATA is scheduled to eventually switch its codes to the ICAO standard. ICAO is also responsible for issuing Alphanumeric Aircraft type codes that contain 3 or 4 characters. These codes provide the identification that is typically used in Flight Plan s. An example of this is the Boeing 747 that would use (depending on the variant) B741, '''B742''' ,'''B743''', etc. ICAO provides Telephony designators to aircraft operators worldwide. These consist of the three letter airline identifer and a one or two word designator. They are usually, but not always, similar to the aircraft operator name. Thus the identifer for Aer Lingus is EIN and the designator is '''Shamrock''' while Japan Airlines International is '''JAL''' and '''Japan Air''' . So a flight by Aer Lingus numbered 111 would be written as "EIN111" and pronounced "Shamrock 111" on the radio, while a similarly numbered Japan Airlines flight would be written as "JAL111" and "Japan Air 111". ICAO Aircraft Registration Prefixes are used to identify the place where the aircraft registers at. For example, '''B-H''' is identified as Hong Kong , then we can know that '''B-HKE''' is a plane which is registered at Hong Kong . Take another example, '''D''' is known as Germany , therefore '''D-AILS''' is a plane which is registered at Germany . ICAO Aircraft Registration Prefixes List
ICAO STATUTE The 8th edition of the Convention on International Civil Aviation includes modifications from 1948 up to year 2000 . The ICAO refers to its current edition of the convention the ''statute'', and designates it as ICAO Doc 7300/8. The convention has 18 annexes:
ICAO STANDARDS The ICAO also standardizes certain functions for use in the airline industry, such as the Aeronautical Message Handling System AMHS; this probably makes it a Standards Organization . REGIONS AND REGIONAL OFFICES The ICAO has seven regional offices serving nine regions: :1. Asia and Pacific, Bangkok, Thailand :2. Middle East, Cairo, Egypt :3. Western and Central Africa, Dakar, Senegal :4. South America, Lima, Peru :5. North America, Central America and Caribbean, Mexico City, Mexico :6. Eastern and Southern Africa, Nairobi, Kenya :7. Europe and North Atlantic, Paris, France SEE ALSO EXTERNAL LINKS
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