Williams Field or Willy Field (ICAO: NZWD) is a United States Antarctic Program airfield in Antarctica. Williams Field consists of two snow runways located on approximately 8 meters (25 ft) of compacted snow, lying on top of 80 meters (262 ft) of ice, floating over 550 meters (1,800 ft) of water. The airport, which is approximately seven miles from Ross Island, serves McMurdo Station and New Zealand’s Scott Base. Until the 2009-10 summer season, Williams was the major airfield for on-continent aircraft operations in Antarctica.