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56-460: Metemma hosts an airport ( ICAO code HAMM, IATA ETE). The town traces its origins to the 18th century, when a colony of Tukrir from Darfur finding the spot a convenient resting-place for their fellow-pilgrims on their way to Mecca and back, obtained permission from the Emperor of Ethiopia to make a permanent settlement there. However Hormuz Rassam records a different account, stating "within

112-475: A seamless global air traffic management system. ICAO has published standards for machine-readable passports . Machine-readable passports have an area where some of the information otherwise written in textual form is also written as strings of alphanumeric characters, printed in a manner suitable for optical character recognition , which enables border controllers and other law enforcement agents to process such passports more quickly without having to enter

168-477: A direct party to ICAO, its government delegated Switzerland to enter into the treaty on its behalf, and the treaty is applicable in the territory of Liechtenstein. The Republic of China was a founding member of ICAO. Following its retreat to Taiwan , it was eventually replaced by the People's Republic of China as the legal representative of China in 1971. In 2013, Taiwan was for the first time invited to attend

224-419: A household, and 27,935 housing units. The majority of the inhabitants practiced Ethiopian Orthodox Christianity , with 83.4% reporting that as their religion, while 16.5% of the population said they were Muslim . The 1994 national census reported a total population for this woreda of 54,913 in 10,546 households, of whom 29,545 were men and 23,368 women; 11,051 or 20.12% of its population were urban dwellers at

280-638: A model of the standard variation of pressure , temperature , density , and viscosity with altitude in the Earth's atmosphere . This is useful in calibrating instruments and designing aircraft. The standardized pressure is also used in calibrating instruments in-flight, particularly above the transition altitude . ICAO is active in infrastructure management, including communication, navigation and surveillance / air traffic management (CNS/ATM) systems, which employ digital technologies (like satellite systems with various levels of automation) in order to maintain

336-540: A myth. Taking a plane is the fastest and cheapest way to fry the planet and this deal won't reduce demand for jet fuel one drop. Instead offsetting aims to cut emissions in other industries, although another critic called it "a timid step in the right direction." Metemma (woreda) Metemma ( Amharic : መተማ) is a woreda in Amhara Region , Ethiopia . Part of the Semien Gondar Zone , Metemma

392-583: A strictly operational and non-political point of view, I believe Taiwan should be there." The ICAO Council is elected by the Assembly every three years and consists of 36 members elected in three groups. The present council was elected in October 2022. The structure of the present Council is as follows: The Air Navigation Commission (ANC) is the ICAO Council technical executive body in charge of 17 of

448-470: A total population of 110,252, an increase of 100.78% over the 1994 census, of whom 58,748 are men and 51,504 women; 29,698 or 26.94% are urban inhabitants. With an area of 6,969.97 square kilometers, Metemma has a population density of 15.82, which is less than the Zone average of 63.76 persons per square kilometer. A total of 29,378 households were counted in this woreda, resulting in an average of 3.75 persons to

504-449: A trade center of some importance. The Scottish explorer James Bruce (who called the town Hor-Cacamoot) travelled through the town in 1772. This location not only made the settlement a major marketplace, but also a major slave market in the 19th century. Richard Pankhurst has published estimates of the number of people sold in this market during the 19th century that range between 10,000 and 20,000. By 1881, European visitors reported that

560-453: A tweet stating that publishers of "irrelevant, compromising and offensive material" would be "precluded". Since that action, the organization has followed a policy of blocking anyone asking about it. The United States House Committee on Foreign Affairs harshly criticized ICAO's perceived failure to uphold principles of fairness, inclusion, and transparency by silencing non-disruptive opposing voices. Senator Marco Rubio also criticized

616-404: Is PAMR.) Not all airports are assigned codes in both systems; for example, airports that do not have airline service do not need an IATA code. ICAO also assigns three-letter airline codes versus the more-familiar two-letter IATA codes—for example, UAL vs. UA for United Airlines . ICAO also provides telephony designators to aircraft operators worldwide, a one- or two-word designator used on

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672-729: Is a specialized agency of the United Nations that coordinates 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 headquarters are located in the Quartier international de Montréal of Montreal , Quebec, Canada. The ICAO Council adopts standards and recommended practices concerning air navigation, its infrastructure, flight inspection , prevention of unlawful interference, and facilitation of border-crossing procedures for international civil aviation . ICAO defines

728-471: Is bordered on the south by Qwara , on the west by Sudan , on the north by Mirab Armachiho , on the northeast by Tach Armachiho , on the east by Chilga , and on the southeast by Takusa . The administrative center is Shehedi ; other towns in Metemma include Metemma and Shinfa . Elevations in this woreda range between 550 and 1600 meters above sea level. annual rainfall ranges from 850 to around 1100mm.

784-538: Is predominantly agricultural. This woreda has been the major center of cotton production inside Ethiopia since the 1950s. In 2003/2004, 21.1 square kilometers were planted in cotton, yielding 168,592 qt of crop. Gum arabic and incense are important cash crops in this woreda; the principal species which produce incense is Boswellia papyrifera , while Acacia seyal and A. polyacantha are harvested for their gum. Three private companies are involved in harvesting incense, which together produce about 500 qt annually. Of

840-787: Is pressing ahead with its plans to include aviation. ICAO has been called "flawed and biased in favour of the industry" by Jo Dardenne, the manager for aviation at Transport & Environment . On 6 October 2016, the ICAO finalized an agreement among its 191 member nations to address the more than 1000 million tonnes of carbon dioxide emitted annually by international passenger and cargo flights. The agreement will use an offsetting scheme called CORSIA (the Carbon Offsetting and Reduction Scheme for International Aviation) under which forestry and other carbon-reducing activities are directly funded, amounting to about 2% of annual revenues for

896-556: The Boeing 747 -100, -200 and -300 are given the type designators B741 , B742 and B743 respectively. Since 2010, ICAO recommends a unification of units of measurement within aviation based on the International System of Units (SI), using: Non-SI units have been permitted for temporary use since 1979, but a termination date has not yet been established, which would complete metrication of worldwide aviation, and

952-579: The Emperor Yohannes IV had ordered the slave market closed. An Italian column from Gadabi occupied Metemma on 12 April 1936, which consisted of one Eritrean battalion, one squadron mounted on camels, and 1 platoon of light tanks. During the occupation , the Italians built a mosque in the town. After war was declared between the British and Italian Empires , the Italians crossed

1008-896: The International Air Transport Association (IATA), a trade association representing airlines ; the Civil Air Navigation Services Organisation (CANSO), an organization for air navigation service providers (ANSPs); and the Airports Council International , a trade association of airport authorities . In addition there are several regional civil aviation commissions, such as the Latin America Civil Aviation Commission (LACAC) who focus on challenges and growth in specific regions. The forerunner to ICAO

1064-660: The War in Amhara , the city saw fierce clashes between the Ethiopian National Defense Force and an Amhara insurgents fighting under the Fano militia. Fano seized Metemma on 1 September 2024, aiming to cut off supplies of fuel and food coming across the border. After being disarmed, Sudanese authorities allowed ENDF troops to retreat into Sudan. On 2 September, 'Amhara Fano Forces Gondar Command' publicly declared

1120-639: The 18 rural kebeles, 12 have organized Farming Service Cooperatives with 2,995 members, and the remaining 6 are in the process of organizing cooperatives. Six cooperatives joined in 200 to form the Metemma Cooperative Union. One micro-finance institution operates in this woreda, the Amhara Credit and Saving Institution SC (ACSI); established in 1998, it has one office at Shehedi and another at Shinfa. As of 2004, ACSI loaned out 5,357,540 Birr to 2,618 clients in this woreda. Metemma

1176-547: The 19 Annexes to the Chicago Convention. ANC develops and recommend ICAO minimal standards that are related to these Annexes. To review and/or finalize the ongoing developments the commission meets for three sessions per year. Each session normally considers a number of documents being developments of ANC expert Panels. The ANC is composed of nineteen commissioners nominated by ICAO States in various aviation domains. However, legally these commissioners do not represent

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1232-406: The 2020 level, allowing unregulated growth until then. Only 65 nations will participate in the initial voluntary period, not including significant emitters Russia, India and perhaps Brazil. The agreement does not cover domestic emissions, which are 40% of the global industry's overall emissions. One observer of the ICAO convention made this summary: Airline claims that flying will now be green are

1288-474: The Chicago Convention, in Chicago , was signed by 52 countries on 7 December 1944. Under its terms, a Provisional International Civil Aviation Organization was to be established, to be replaced in turn by a permanent organization when twenty-six countries ratified the convention. PICAO began operating on 6 June 1945, replacing ICAN. The 26th country ratified the convention on 5 March 1947 and, consequently, PICAO

1344-768: The Convention on International Civil Aviation. Altitude, elevation, height. ICAO has a headquarters, seven regional offices, and one regional sub-office: Emissions from international aviation are specifically excluded from the targets agreed under the Kyoto Protocol . Instead, the Protocol invites developed countries to pursue the limitation or reduction of emissions through the International Civil Aviation Organization. ICAO's environmental committee continues to consider

1400-579: The ICAO Assembly, at its 38th session, as a guest under the name of " Chinese Taipei ". As of September 2019 , it has not been invited to participate again, due to renewed PRC pressure. The host government, Canada , supports Taiwan's inclusion in ICAO. Support also comes from Canada's commercial sector with the president of the Air Transport Association of Canada saying in 2019 that "It's about safety in aviation so from

1456-649: The ICAO code for Los Angeles International Airport is KLAX. Canada follows a similar pattern, where a prefix of C is usually added to an IATA code to create the ICAO code. For example, Calgary International Airport is YYC or CYYC. (In contrast, airports in Hawaii are in the Pacific region and so have ICAO codes that start with PH ; Kona International Airport 's code is PHKO. Similarly, airports in Alaska have ICAO codes that start with PA . Merrill Field , for instance

1512-488: The ICAO triennial conference to Doha was defeated by a vote of 22–14. In January 2020, ICAO blocked several Twitter users, including think-tank analysts, U.S. Congressional staff, and journalists, who mentioned Taiwan in tweets related to ICAO. Many of the tweets were related to the COVID-19 pandemic and Taiwan's exclusion from ICAO safety and health bulletins due to pressure from China . In response, ICAO issued

1568-680: The International Flight Network, Philbin refused to acknowledge the existence of Taiwan. On 1 February 2020, the United States Department of State issued a press release heavily criticizing ICAO's actions, characterizing them as "outrageous, unacceptable, and not befitting of a UN organization." The 9th edition of the Convention on International Civil Aviation includes modifications from years 1948 up to 2006. ICAO refers to its current edition of

1624-649: The Kyoto targets agreed by countries. This has led to some national policies such as fuel and emission taxes for domestic air travel in the Netherlands and Norway , respectively. Although some countries tax the fuel used by domestic aviation, there is no duty on kerosene used on international flights. ICAO is currently opposed to the inclusion of aviation in the European Union Emission Trading Scheme (EU ETS). The EU , however,

1680-717: The US, FAA practices require the digits of the flight number to be spoken in group format ("Japan Air One Eleven" in the above example) while individual digits are used for the aircraft tail number used for unscheduled civil flights. ICAO maintains the standards for aircraft registration , including the alphanumeric codes that identify the country of registration. ICAO is also responsible for issuing two to four character alphanumeric aircraft type designators for those aircraft types which are most commonly provided with air traffic service. These codes provide an abbreviated aircraft type identification, typically used in flight plans . For example,

1736-775: The airline industry, such as the Aeronautical Message Handling System (AMHS). This makes it a standards organization . Each country should have an accessible Aeronautical Information Publication (AIP), based on standards defined by ICAO, containing information essential to air navigation . Countries are required to update their AIP manuals every 28 days and so provide definitive regulations, procedures and information for each country about airspace and airports. ICAO's standards also dictate that temporary hazards to aircraft must be regularly published using NOTAMs . ICAO defines an International Standard Atmosphere (also known as ICAO Standard Atmosphere),

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1792-505: The border and occupied Gallabat. But the British recaptured the town 6 November 1940 with the intent of then capturing Metemma; however, the attack on Metemma failed miserably and the British were forced to evacuate Gallabat again. They occupied Metemma for good 19 January 1941. The trade route through Metemma remained important up to the beginning of the 20th century, but the introduction of rail transport to Sudan, as well as improvements to

1848-634: The city to be under their control. Based on figures from the Central Statistical Agency of Ethiopia published in 2005, Metemma has an estimated total population of 5,581, with 3,132 males and 2,449 females. The 1994 census reported this town had a total population of 3,183 of whom 1,648 were males and 1,535 were females. It is one of three towns in Metemma woreda . ICAO The International Civil Aviation Organization ( ICAO / ˌ aɪ ˈ k eɪ oʊ / eye- KAY -oh )

1904-458: The code LFPO (the 3rd letter sometimes refers to the particular flight information region (FIR) or the last two may be arbitrary). In most parts of the world, ICAO and IATA codes are unrelated; for example, Charles de Gaulle Airport has an IATA code of CDG. However, the location prefix for the continental United States is K , and ICAO codes are usually the IATA code with this prefix. For example,

1960-529: The convention as the Statute and designates it as ICAO Document 7300/9. The convention has 19 Annexes that are listed by title in the article Convention on International Civil Aviation . As of April 2019 , there are 193 ICAO members, consisting of 192 of the 193 UN members (all but Liechtenstein , which lacks an international airport), plus the Cook Islands . Despite Liechtenstein not being

2016-506: The deal was mixed. The agreement has critics. It is not aligned with the 2015 Paris climate agreement, which set the objective of restricting global warming to 1.5 to 2 °C. A late draft of the agreement would have required the air transport industry to assess its share of global carbon budgeting to meet that objective, but the text was removed in the agreed version. CORSIA will regulate only about 25 percent of aviation's international emissions, since it grandfathers all emissions below

2072-488: The direction of the ANC through the formal process of ICAO Panels. Once approved by the commission, standards are sent to the council, the political body of ICAO, for consultation and coordination with the member states before final adoption. ICAO is distinct from other international air transport organizations, particularly because it alone is vested with international authority (among signatory states): other organizations include

2128-1165: The following units are still in widespread use within commercial aviation: inches of mercury are used in Japan and North America to measure pressure, although sometimes METAR at Japanese airports show only hPa . Aviation in Russia and China currently use km/h for reporting airspeed, and many present-day European glider planes also indicate airspeed in kilometres per hour. China and North Korea use metres for reporting altitude when communicating with pilots. Russia also formerly used metres exclusively for reporting altitude, but in 2011 changed to feet for high altitude flight. From February 2017, Russian airspace started transitioning to reporting altitude in feet only. Runway lengths are now commonly given in metres worldwide, except in North America where feet are commonly used. The following table summarizes units commonly used in flight and ground operations and their recommended replacement. A full list of recommended units can be found in annex 5 to

2184-498: The information manually into a computer. ICAO's technical standard for machine-readable passports is contained in Document 9303 Machine Readable Travel Documents . A more recent standard covers biometric passports . These contain biometrics to authenticate the identity of travellers. The passport's critical information is stored on a tiny RFID computer chip, much like information stored on smart cards . Like some smart cards,

2240-401: The interest of their State or any particular State or region. They have to conduct independently in the interest of the entire international civil aviation community. Additionally, several other representatives from ICAO States and up to eight members from the civil aviation industry may be invited to take part in ANC meetings as observers. ICAO also standardizes certain functions for use in

2296-444: The last century" (i.e., the 18th century) the rulers of Metemma were in constant war with their counterparts at Er-Rashid and constituted their armies with slaves taken from Kurdufan and Darfur. These foreign conscripts eventually revolted and killed the "so-called Arab chief", making one of their own number ruler. Lying on the main trade route from Sennar to Gondar (some 90 miles to the east by south), Metemma/Gallabat grew into

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2352-559: The move. The Ministry of Foreign Affairs (Taiwan) (MOFA) and Taiwanese legislators criticized the move with MOFA head Jaushieh Joseph Wu tweeting in support of those blocked. In January 2020, Anthony Philbin, Chief of Communications for the ICAO Secretary General, defended ICAO's actions, stating, 'We felt completely justified in taking steps to protect the integrity of the information and discussions that our followers reasonably expect from our feeds.' In exchanges with

2408-540: The passport book design calls for an embedded contactless chip that is able to hold digital signature data to ensure the integrity of the passport and the biometric data. Both ICAO and IATA have their own airport and airline code systems. ICAO uses 4-letter airport codes (vs. IATA's 3-letter codes ). The ICAO code is based on the region and country of the airport—for example, Charles de Gaulle Airport has an ICAO code of LFPG, where L indicates Southern Europe, F , France, PG , Paris de Gaulle, while Orly Airport has

2464-405: The potential for using market-based measures such as trading and charging, but this work is unlikely to lead to global action. It is currently developing guidance for states who wish to include aviation in an emissions trading scheme (ETS) to meet their Kyoto commitments, and for airlines who wish to participate voluntarily in a trading scheme. Emissions from domestic aviation are included within

2520-583: The protocols for air accident investigation that are followed by transport safety authorities in countries signatory to the Convention on International Civil Aviation . The Air Navigation Commission (ANC) is the technical body within ICAO. The commission is composed of 19 commissioners, nominated by the ICAO's contracting states and appointed by the ICAO Council. Commissioners serve as independent experts, who although nominated by their states, do not serve as state or political representatives. International Standards and Recommended Practices are developed under

2576-457: The radio, usually, but not always, similar to the aircraft operator name. For example, the identifier for Japan Airlines International is JAL and the designator is Japan Air , but Aer Lingus is EIN and Shamrock . Thus, a Japan Airlines flight numbered 111 would be written as "JAL111" and pronounced "Japan Air One One One" on the radio, while a similarly numbered Aer Lingus would be written as "EIN111" and pronounced "Shamrock One One One". In

2632-626: The roads inside Ethiopia robbed the town of its importance, until by E.C. 1944 (AD 1952) an official survey found only 129 thatched and corrugated-roof houses in Metemma, of which "fourteen were government properties, three were owned by nagades and twelve were empty -- probably reserved for renting." During the Ethiopian Civil War , Metemma was captured by the Ethiopian Democratic Union (EDU) on 13 January 1977, who attacked from positions inside Sudan. The town

2688-414: The sector. Rules against 'double counting' should ensure that existing forest protection efforts are not recycled. The scheme did not take effect until 2021 and will be voluntary until 2027, but many countries, including the US and China, have promised to begin at its 2020 inception date. Under the agreement, the global aviation emissions target is a 50% reduction by 2050 relative to 2005. NGO reaction to

2744-632: The temperature is with in the range of 13.6 to 35.5 with higher temperature readings of about up to 41 in warmest months. Rivers include the Atbarah , the Genda Wuha, the Guang and the Shenfa. The natural vegetation of this woreda is predominantly Acacia trees with Hyparrhenia grasses growing beneath. Another common tree here is Neem ( Azadirachta indica ), which is frequently planted along roads in

2800-703: The time. The five largest ethnic groups reported in Metemma were the Amhara (78.87%), the Qemant (10.27%), the Tigrayan (7.01%), the Gumuz (2.1%), and the Agaw Awi (1.25%); all other ethnic groups made up 0.5% of the population. Amharic was spoken as a first language by 89.48%, 6.76% spoke Tigrinya , 2.11% Gumuz , and 1.25% spoke Awngi ; the remaining 0.4% spoke all other primary languages reported. The majority of

2856-647: The towns, and as shade trees in rural areas. A survey of the land in this woreda shows that 23.6% is arable or cultivable, 4.13% pasture, 71% forest or shrubland, and the remaining 1.3% is considered degraded or other. Teff , corn , sorghum , cotton and sesame are important cash crops; the town of Metemma serves as an important trade gateway between Sudan and the Amhara Region. Between November 2000 and June 2002, SUR Construction built three road segments connecting Metemma with Wohni by way of Shehedi, totalling in length 70 kilometers. The economy of Metemma

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2912-537: Was disestablished on 4 April 1947 and replaced by ICAO, which began operations the same day. In October 1947, ICAO became an agency of the United Nations under its Economic and Social Council (ECOSOC). In April 2013, Qatar offered to serve as the new permanent seat of the Organization. Qatar promised to construct a massive new headquarters for ICAO and to cover all moving expenses, stating that Montreal "was too far from Europe and Asia", "had cold winters",

2968-478: Was hard to attend due to the Canadian government's slow issuance of visas, and that the taxes imposed on ICAO by Canada were too high. According to The Globe and Mail , Qatar's invitation was at least partly motivated by the pro-Israel foreign policy of Canadian Prime Minister Stephen Harper . Approximately a month later, Qatar withdrew its bid after a separate proposal to the ICAO's governing council to move

3024-496: Was selected by the Ministry of Agriculture and Rural Development in 2003 as an area for voluntary resettlement for farmers from overpopulated areas. Along with Qwara, the other woreda selected in Amhara that year, that year this woreda became the home for a total of 13,742 heads of households and 12,337 family members. Based on the 2007 national census conducted by the Central Statistical Agency of Ethiopia (CSA), this woreda has

3080-613: Was taken from the EDU by the Ethiopian People's Revolutionary Democratic Front 7 October 1990, claiming to have killed 28 of its enemy forces, wounded 21, and captured 16. A road to Al Qadarif of good standard was completed mid-March 2002, allowing import and export goods to be sent through Port Sudan , where an area had been reserved for Ethiopian goods and containers. During the 2023 Sudanese refugee crisis , thousands of Sudanese refugees were reported arriving in Metemma. During

3136-730: Was the International Commission for Air Navigation (ICAN). It held its first convention in 1903 in Berlin , Germany , but no agreements were reached among the eight countries that attended. At the second convention in 1906, also held in Berlin, twenty-seven countries attended. The third convention, held in London in 1912, allocated the first radio callsigns for use by aircraft. ICAN continued to operate until 1945. The Convention on International Civil Aviation , also known as

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