HMAS Watson is a Royal Australian Navy (RAN) base located on Sydney Harbour at South Head, near Watsons Bay, New South Wales. Commissioned in 1945 (after three years operating as HMAS Radar), the base served as the RAN's radar training school. In 1956, torpedo and anti-submarine warfare training were relocated to the base, and by 2011, Watson was the main maritime warfare training base, as well as providing post-entry education for Seaman Officers, training for Combat System sailors, and command training.