“Her or His Majesty's Australian Ship (HMAS) is a ship prefix used for commissioned units of the Royal Australian Navy. This prefix is derived from HMS (Her/His Majesty's Ship), the prefix used by the Royal Navy of the United Kingdom, and can be equally applied to warships and shore bases (as Australia follows the British tradition of referring to naval establishments as ships or stone frigates). The prefix came into use in October 1911, when King George V of the United Kingdom fixed his signature to the approval for the Royal Australian Navy. The prefix refers to the King or Queen of Australia, who is also equally and separately the British monarch. The first word of the prefix changes depending on the gender of the reigning Australian monarch”. – Wikipedia

Protesters demonstrate as the HMAS Adelaide is scuttled off the coast of Avoca Beach on April 13, 2011 in Gosford, Australia. (Photo by Brendon Thorne/Getty Images)

The HMAS Adelaide is scuttled off the coast of Avoca Beach on April 13, 2011 in Gosford, Australia. After the scuttling was succesfully protested in 2010, today the HMAS Adelaide was finally scuttled off the NSW Central Coast to create an artifical reef, the first of its kind in this state. (Photo by Brendon Thorne/Getty Images)

A woman and her children look at a protest message written in the sky as the HMAS Adelaide is scuttled off the coast of Avoca Beach on April 13, 2011 in Gosford, Australia. (Photo by Brendon Thorne/Getty Images)