|Event||Operations against German Pacific territories|
|Conflict||First World War, 1914-1918|
First World War, 1914-1918
Protector was originally built as a steam-driven gunboat for the South Australian government and commissioned into that colony's navy in 1884. Between September and November 1900 she was deployed to China as part of the Australian colonies' contingent to the forces suppressing the Boxer Rebellion. During this period she was commissioned into Britain's Royal Navy. Upon Federation in 1901 Protector became part of the Commonwealth Naval Forces and, following the establishment of the RAN, was commissioned into that service on 1 July 1911. By 1913 Protector was rearmed for service as gunnery tender at Williamstown Naval Depot.
Following the outbreak of the First World War in August 1914, Protector proceeded to Sydney to act as tender for the submarines AE1 and AE2. In early September, she escorted the submarines and their depot ship Upolu to New Guinea waters and took part in the operations to capture Germany's Pacific colonies. On 13 September, she captured the steamer Madang off Herbertshehe. Protector returned to Sydney in October 1914.
In October 1915, Protector towed a barge from Sydney to Perth and then proceeded to Cocos Island to assess the possibility of salvaging equipment from the Emden. For the remainder of the war she carried out patrols in southern Australian waters.
After the war, Protector served as the tender to Williamstown Naval Depot, before taking the advance party to establish Flinders Naval Base. On 1 April 1921, she became tender to the base and her name was changed to Cerberus.
Sold by the RAN in June 1924, she saw service as a barge for the next twenty years. In 1943, Protector was requisitioned by the US Army but while being towed north she collided with another vessel and was abandoned off Gladstone, Queensland. Her hulk still lies just off Heron Island.