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Aviation in the United States. The United States has an extensive air transportation network. In 2013, there were 86 airports in the U.S. that annually handled over 1,000,000 passengers each. [1] The civil airline industry is entirely privately owned and has been largely deregulated since 1978, while most major airports are publicly owned. [2]
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Systems of measurement have historically been important, regulated and defined for the purposes of science and commerce. Instances in use include the International System of Units or SI (the modern form of the metric system ), the British imperial system, and the United States customary system .
Category:Aviation units and formations of the United States - Wikipedia. Subcategories. This category has the following 6 subcategories, out of 6 total. Air groups of the United States (5 C) Air units and formations of the United States Navy (3 C, 15 P) Aviation units and formations of the United States Army (10 C, 3 P)
Aviation Aircraft altitudes for air traffic control and related purposes are measured in feet in the U.S. In fact, most of the world has used feet for aviation altitudes since the end of World War II (meters before 1945 in all European countries except the UK), with the notable exceptions of China, North Korea, and many former Soviet countries.
Imperial units. The former Weights and Measures office in Seven Sisters, London (590 Seven Sisters Road) The imperial system of units, imperial system or imperial units (also known as British Imperial [1] or Exchequer Standards of 1826) is the system of units first defined in the British Weights and Measures Act 1824 ( 5 Geo. 4. c.
Hanyu Pinyin. shìyòngzhì. Wade–Giles. shih-yung-chih. Chinese units of measurement, known in Chinese as the shìzhì ("market system"), are the traditional units of measurement of the Han Chinese. Although Chinese numerals have been decimal (base-10) since the Shang, several Chinese measures use hexadecimal (base-16). [citation needed]
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