 was the base ship at Darwin, Australia during World War II.In the Royal Navy, under section 87 of the Naval Discipline Act 1866, the provisions of the act only applied to officers and men of the Royal Navy borne on the books of a warship.When shore establishments began to become more common it was necessary to allocate the title of the establishment to an actual vessel which became the "nominal depot ship" for the men allocated to the establishment and thus ensured they were subject to the provisions of the Act.