Article 3. For the purpose of these Regulations, "irregular flight" means flight in civil air transportation which does not belong to any regular air service.

第三条本规定所称不定期飞行，是指不属于定期航班的民用航空运输飞行。

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Responsibilities: in charge of urban construction, environmental protection, transportation, civil air defense (civil defense) and port construction.

职责：负责城建、环保、交通、人防(民防)和港口建设工作。

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Air traffic control (ATC) plays an important role in civil aviation and harmonizes the airlines and airports to accomplish the mission of civil aviation transportation.

空中交通管制是民航重要的组成部分，它协调航空公司和机场，共同完成民航运输。

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With respect to the last, Captain Dennis Eckenrod , a former Chief Pilot for American Airlines, described the potentially transforming effect of V-22 derivatives on the civil air transportation industry.

CENTERFORSECURITYPOLICY: The V-22: Exemplar of Transformation

We track important developments in homeland security policies and programs in the United States National Guard, the Federal Emergency Management Agency, the United States Coast Guard, U.S. Customs and Border Protection, U.S. Immigration and Customs Enforcement, United States Citizenship and Immigration Services, the United States Secret Service, the Transportation Security Administration, and Civil Air Patrol.

CENTERFORSECURITYPOLICY: Homeland Security