HMAS Grass Snake [SEP] vessel class
HMAS Grass Snake
HMAS "Grass Snake" was a Snake-class junk built for the Royal Australian Navy during the Second World War. She was launched in 1945 and commissioned into the Royal Australian Navy on 23 April 1945. 
The vessel departed Broome, Western Australia on 4 June for Darwin, Northern Territory on a voyage plagued with mechanical and radio problems. In heavy weather the rudder was damaged requiring anchorage at Cockatoo Island (Western Australia) for repairs on 5 June. An attempt to sail the next day showed
HMAS Mother Snake
HMAS "Mother Snake" was an auxiliary vessel operated by the Royal Australian Navy (RAN) during the Second World War. She was launched in 1944, as Australian Army AV 1354 "Murchison" transferred to the RAN and commissioned on 23 May 1945. She was used by the Services Reconnaissance Department and was paid off on 30 June 1945, before being handed over to the British Civil Administration in Borneo in 1945.
References.
- Naval Historical Society of Australia - "On this day"