HMAS Una was a 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...

 sloop that began its life as the German motor launch Komet. The ship and her 57 crew was captured by an infantry detachment of the Australian Naval and Military Expeditionary Force

Australian Naval and Military Expeditionary Force

The Australian Naval and Military Expeditionary Force was a small volunteer force of approximately 2,000 men, raised in Australia shortly after the outbreak of the First World War to seize and destroy German wireless stations in German New Guinea in the south-west Pacific...

 led by John Paton

John Paton (general)

Major General John Gibson Paton CB, CMG was an Australian general who served in World War I. Paton was born in Newcastle, New South Wales and joined the New South Wales Military Forces in December 1887 as a second lieutenant in the 4th Infantry...

 on 9 October 1914, with no loss of life. Komet was then sailed to Sydney as a prize.

In December 1918, Una was sent to Darwin

Darwin, Northern Territory

Darwin is the capital city of the Northern Territory, Australia. Situated on the Timor Sea, Darwin has a population of 127,500, making it by far the largest and most populated city in the sparsely populated Northern Territory, but the least populous of all Australia's capital cities...

 to protect Administrator

Administrator of the Northern Territory

The Administrator of the Northern Territory is an official appointed by the Governor-General of Australia to exercise powers analogous to that of a state governor...

 John Gilruth

John A. Gilruth

John Anderson Gilruth was a veterinary scientist and administrator. He is particularly noted for being Administrator of the Northern Territory from 1912 to 1918, when he was recalled after an angry mob demanded that he resign...

, following the Darwin Rebellion

Darwin Rebellion

The Darwin Rebellion of 17 December 1918 was the culmination of unrest in the Australian Workers' Union which had grown between 1911 and 1919. Led by Harold Nelson, some 1000 demonstrators marched on Government House at Liberty Square in Darwin, Northern Territory, Australia where they burnt an...

. She arrived on Christmas Eve anchoring beneath the Government House

Government House, Darwin

Government House, Darwin is the office and official residence of the Administrator of the Northern Territory. Built between 1870 and 1878, the building is set on 13,000 square metres of hillside gardens in the centre of the Darwin business district, on The Esplanade.-History:Government House is...

 cliffs until arrived in early 1919.

After World War I, Una was decommissioned and taken to Port Phillip

Port Phillip

Port Phillip Port Phillip Port Phillip (also commonly referred to as Port Phillip Bay or (locally) just The Bay, is a large bay in southern Victoria, Australia; it is the location of Melbourne. Geographically, the bay covers and the shore stretches roughly . Although it is extremely shallow for...

 Bay, renamed Akuna and used as a pilot vessel. She was finally broken up in Melbourne in 1955.