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About ICAO
  • Overview
  • Strategic Plan 2026-2050
  • Latest News and Highlights
  • FAQs
  • List - ICAO Member States
  • ICAO Museum
  • ICAO Carbon Calculator
  • Report Misconduct
  • Contact ICAO
Diplomatic Bodies
  • ICAO Assembly (193 States)
  • Sessions of the Assembly
  • Resolutions in Force
  • ICAO Council (36 States)
  • President of the Council
  • Sessions of the Council
  • Council State Representatives
  • Air Navigation Commission
ICAO Secretariat
  • Secretary General
  • Air Navigation Bureau
  • Air Transport Bureau
  • Capacity Development and Implementation Bureau
  • Legal Affairs and External Relations Bureau
  • Administration Bureau
  • Regional Offices
Global Priorities
Strategic Goals
  • Every Flight is Safe and Secure
  • Aviation is Environmentally Sustainable
  • • CORSIA
  • • State Action Plans for Aviation CO2 Reduction
  • • Finvest Hub
  • Aviation Delivers Seamless, Accessible, and Reliable Mobility for All
  • No Country Left Behind
  • • Capacity Development and Implementation Support
  • The International Civil Aviation Convention and Other Treaties, Laws and Regulations Address All Challenges
  • The Economic Development of Air Transport Assures the Delivery of Economic Prosperity and Societal Well-Being for All
Enablers
  • ICAO Continuous Improvement
  • Innovation in Aviation
  • Next Generation Aviation Professionals
  • Gender Equality
  • ICAO Global Ambassadors Programme
  • ICAO Training
  • Partnerships and Resource Mobilization
Events
Featured Events
  • Global Aviation Gender Summit 2026
  • Twenty-First Symposium and Exhibition on the ICAO Traveller Identification Programme (TRIP)
  • ICAO/EASA Third Global RSOO/RAIO Forum for Aviation Safety
  • ICAO Air Navigation World (ANW) 2026 – Air Traffic Flow Management (ATFM)
Event Information
  • Host your Event at ICAO
  • View the full list of Coming and Past Meetings & Events
Resources
Resources
  • ICAO E-Library
  • Publications
  • Annual Reports of the Council
  • Safety Audit Results - Interactive
  • Aviation Benefits Report
  • Economic Facts and Figures
  • Global Aviation Safety Plan
  • Safety Reports
  • Global Air Navigation Plan
  • Air Navigation Reports
  • ICAO Partnership Programme
  • ICAO API Data Service
  • ICAO Data+
  • ICAO iSTARS
  • Air Transport Monthly Monitor
  • Compendium: Competition Policies/Practices
  • Economic Analyses and Forecasting
  • Databases and Studies
  • Environment Reports
  • Environment Publications
  • ICAO TRIP Strategy Compendium
  • Unmanned Aviation
  • ICAO GIS Aviation Data
Procurement
Careers
Featured Articles
ICAO TV
ICAO store
Subscribe
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Bernardus Tieleman Twigt (Netherlands)
Page ContentFOURTH ICAO SECRETARY GENERALTERM OF OFFICE: 1964-1970   Bernardus Tieleman Twigt was born in Rotterdam, Netherlands on 3 December 1912. He received his Doctor of Economics from…
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Bernardus Tieleman Twigt (Pays-Bas)
Page ContentQUATRIÈME SECRÉTAIRE GÉNÉRAL DE L'OACIMANDAT: 1964-1970   Bernardus Tieleman Twigt est né le 3 décembre 1912 à Rotterdam, au Pays-Bas. Il a reçu un doctorat en sciences économiques…
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博纳多斯 特尔曼 维特 (荷兰)
Page Content国际民航组织第四秘书长任期:1964-1970年   1912年12月3日,博纳多斯•特尔曼•维特出生在荷兰鹿特丹,1947年获得鹿特丹大学经济学博士。  1940以前,维特博士在鹿特丹的私营航运企业担任不同职务,1940-1949年,任荷兰经济部官员。1949年,他加入ICAO,任行政和财务局副主任。1956年,…
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Ronald MacAlister Macdonnell (Canada)
Page ContentTHIRD ICAO SECRETARY GENERALTERM OF OFFICE: 1959-1964   Ronald MacAlister Macdonnell was born in Vernon, British Columbia on 11 May 1909. He was educated at the University of…
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Ronald MacAlister Macdonnell (Canada)
Page ContentTROISIÈME SECRÉTAIRE GÉNÉRAL DE L'OACIMANDAT: 1959-1964   Ronald MacAlister Macdonnell est né le 11 mai 1909 à Vernon, en Colombie-Britannique. Il a fréquenté l'Université du…
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罗纳德 麦卡利斯特 麦克唐纳 (加拿大)
Page Content国际民航组织第三秘书长任期:1959-1964年   1909年5月11日,罗纳德•麦卡利斯特•麦克唐纳出生于加拿大不列颠哥伦比亚的弗农。1925-1930年,就读于曼尼托巴大学,1930-1932年就读于牛津大学。  1934-1947年,麦克唐纳先生是对外事务部第三任秘书。他参加了1944年芝加哥国际民用航空大会,…
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Carl Ljungberg (Sweden)
Page ContentSECOND ICAO SECRETARY GENERALTERM OF OFFICE: 1952-1959   Ernst Carl Robert Ljungberg was born in Sweden on 17July 1897. Mr. Ljungberg was a student and lecturer at the…
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Carl Ljungberg (Suède)
Page ContentDEUXIÈME SECRÉTAIRE GÉNÉRAL DE L'OACIMANDAT: 1952-1959  Ernst Carl Robert Ljungberg est né en Suède le 17 juillet 1897. M. Ljungberg fut étudiant et professeur à l'Académie…
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卡尔 罗伯特 永贝里 (瑞典)
Page Content国际民航组织第二秘书长任期:1952-1959年  1897年7月17日,厄恩斯特•卡尔•罗伯特•永贝里出生于瑞典。 永贝里先生早年是皇家炮兵工程学院的一名学生和讲师,是一名瑞典信号和工程兵部队的军官,后在总参谋部(运输)任职。 自1939年开始,他积极参与国际航空活动,代表他的国家多次参加国际民航组织会议。1945-1952年,…
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Albert Roper (France)
Page ContentFIRST PICAO AND ICAO SECRETARY GENERALTERM OF OFFICE: PICAO 1944-1947; ICAO 1947-1951   Albert Jean François Roper was born in Paris on 21 April 1891. He received a Doctor of…
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