Watertown Municipal Airport is a public use airport located in and owned by the city of Watertown, in Jefferson County, Wisconsin, United States. It is included in the Federal Aviation Administration (FAA) National Plan of Integrated Airport Systems for 2017–2021, in which it is categorized as a regional general aviation facility.Although most U.S. airports use the same three-letter location identifier for the FAA and IATA, this airport is assigned RYV by the FAA but has no designation from the IATA.Watertown Municipal Airport was the site of the first Transponder Landing System in the United States.Facilities and aircraftWatertown Municipal Airport covers an area of 360acre at an elevation of 833 feet (254 m) above mean sea level. It has two runways: Runway 5/23: 4,429 x 75 ft. (1,350 x 23 m.), Surface: Asphalt. Approved GPS and NDB approaches. Runway 11/29: 2,801 x 75 ft. (854 x 23 m.), Surface: Asphalt. Approved GPS approaches.The ROCK RIVER (RYV) non-directional beacon, 371 kHz, is located on the field.
