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Ryan Airfield〔 , also known as Ryan Field,〔 is a city owned, public use airport located 10 nautical miles (12 mi, 19 km) southwest of the central business district of Tucson, a city in Pima County, Arizona, United States.〔 It is included in the National Plan of Integrated Airport Systems for 2011–2015, which categorized it as a ''reliever airport''.〔 〕 It is mostly used for general aviation but also serves a significant amount of law enforcement and military helicopter activity. Approximately 50% of Ryan's traffic is training-related. Although most U.S. airports use the same three-letter location identifier for the FAA and IATA, this airport is assigned RYN by the FAA〔 but has no designation from the IATA〔 (【引用サイトリンク】 Ryan Field (ICAO: KRYN, FAA: RYN, IATA: none) ) 〕 (which assigned RYN to Royan - Médis Airport in Royan, France).〔 (【引用サイトリンク】 Batom Airport, Indonesia (IATA: RYN, ICAO: LFCY) ) 〕 The airport's ICAO identifier is KRYN.〔 〕 ==History== Ryan was built by the United States Army Air Forces in 1942 as a site for primary flight training. Military flight training at Ryan ceased in 1944 and the property was conveyed to the State of Arizona in 1948. Currently owned by the City of Tucson, Ryan is operated by the Tucson Airport Authority under an agreement which expires in 2054. An air traffic control tower was constructed at Ryan in 1993. The airport was added to the Contract Tower Program in 1996. In September 2004 the tower staff completed the one millionth operation without an error. In May 2010, the tower staff achieved two million operations without an error. Significant infrastructure improvements and major maintenance projects are accomplished continuously, as is private and commercial hangar construction. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ryan Airfield」の詳細全文を読む スポンサード リンク
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