HMAS Kooronga was a 60-ton tug boat and training ship operated by the Royal Australian Navy

Royal Australian Navy

The Royal Australian Navy is the naval branch of the Australian Defence Force. Following the Federation of Australia in 1901, the ships and resources of the separate colonial navies were integrated into a national force: the Commonwealth Naval Forces...

 (RAN). She was constructed at the Williamstown Dockyard

Williamstown Dockyard

Williamstown Dockyard was one of Australia's principal ship building yards at Williamstown, Victoria, Australia.The Colony of Victoria decided to construct a large slipway at Williamstown to provide ship repair facilities in 1856 and the Government Patent Slip was opened in 1858. Slip Pier was...

, Victoria

Victoria (Australia)

Victoria is the second most populous state in Australia. Geographically the smallest mainland state, Victoria is bordered by New South Wales, South Australia, and Tasmania on Boundary Islet to the north, west and south respectively....

 in 1917. Kooronga was commissioned on 6 June 1924 and named Cerberus II as a tender at the Flinders Naval Depot. The vessel was later renamed HMAS Kooronga. She ran aground in the Port Phillip channel and was stranded from 28 June until 14 July 1940. Upon being refloated she was refitted out.

Kooronga remained in RAN service until 1947. She was sold into private hands in 1948, renamed Black Witch II, and converted to a schooner. On 14 August 1958, the schooner ran aground at Apollo Bay beach during a gale. The wreck is believed to be buried under the sand.