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{{Infobox Airport|name=Naval Air Station Patuxent River|nativename=Trapnell Field|image=Cnic 042301.jpg|IATA = NHK|ICAO = KNHK - [[Location identifier|FAA]]: NHK|operator = [[United States Navy]]|type = [[Naval Air Station]]|location = Patuxent River, Maryland|built = [[1 April]] [[1943]]|used = Active|commander = |elevation_f = 39|elevation_m = 12|coordinates = {{coord|38|17|10|N|76|24|42|W|type:airport_region:US}}|r1-number = 6/24|r1-length-f = 11,807|r1-length-m = 3,599|r1-surface = [[Asphalt]]|r2-number = 14/32|r2-length-f = 9,742|r2-length-m = 2,969|r2-surface = [[Concrete]]|r3-number = 2/20|r3-length-f = 5,021|r3-length-m = 1,530|r3-surface = Asphalt}}''"Pax River" redirects here. For the river, see [[Patuxent River]].'' '''Naval Air Station Patuxent River''' {{airport codes|NHK|KNHK|NHK}}, also known as '''NAS Pax River''', is a [[United States]] [[Naval Air Station]] located in [[Saint Mary's County, Maryland|St. Mary's County]] on [[Chesapeake Bay]] near the mouth of the [[Patuxent River]]. It is home to the [[U.S. Naval Test Pilot School]] and serves a center for test and evaluation and systems acquisition relating to [[Naval Aviation]]. Commissioned on [[1 April]] [[1943]] on land largely acquired through [[eminent domain]], the air station grew rapidly in response to [[World War II]].