HMAS HDML 1321, also known as Rushcutter was a 58-ton Harbour Defence Motor Launch (HMDL) of the Royal Australian Navy (RAN).

[1] She was assigned to Z Special Unit and delivered commandos for the 1945 ill-fated raid on Muschu Island.

[2] She was later reclassified as a Seaward Defence Boat and put into reserve after the war.

Paid off in August 1971, she was converted to pleasure craft MV Rushcutter and is now based in Darwin.

[3][4] In mid July 2018, it was refloated by using buoyancy assistance and pumps, then removed from the water for further preservation.