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HMVS Cerberus

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HMVS Cerberus

HMVS Cerberus (Her Majesty's Victorian Ship) is a breastwork monitor that served in the Victoria Naval Forces, the Commonwealth Naval Forces (CNF), and the Royal Australian Navy (RAN) between 1871 and 1924.

Built in Jarrow, UK, at Palmers Shipbuilding and Iron Company for the colony of Victoria, Australia, under the supervision of Charles Pasley, Cerberus was completed in 1870, and arrived in Port Phillip, the port of Melbourne on the SE coast of Australia in 1871, where she spent the rest of her career. The monitor was absorbed into the CNF following Federation in 1901, and was renamed HMAS Cerberus when the navy became the RAN in 1911. By World War I, Cerberus' weapons and boilers were inoperable; the ship served as a guardship and munitions store, while carrying the personnel of the fledgling Royal Australian Naval College on her paybooks. In 1921, the ship was renamed HMAS Platypus II, and tasked as a submarine tender for the RAN's six J-class submarines.

"H.M.A.S. Cerberus, the ship that for many years has been anchored at the mouth of the Yarra serving as a training ship, was towed to Geelong to-day. Under the name Platypus she will now serve as a depot ship and submarine base. The Cerberus entered Hobson’s Bay on April 9, 1871, and was then the most modern ironclad afloat, representing the last word in naval architecture; she was certainly at that, time the most powerful vessel in the southern seas. She was built to the order of the Victorian Government, whose navy then consisted of the frigates Victoria and Nelson. In recognition of the part played by Victoria in the New Zealand war, the Imperial government granted £100,000 to the new State toward the cost of a modern warship. The voyage of the Cerberus to Australia occupied five months, and fears were entertained that she would founder. She rolled to forty degrees, and her out-of-water weight was 1,900 tons as compared with an under-water weight of 1,800 tons. The Victorian flag was hoisted on the ship at Port Said on December in. 1870.

The Cerberus remained at the Yarra mouth so long that special derricks had to be used to lift her anchors." 1921, A Page of History, Famous Ship Leaves Her Old Moorings.

In 1924, the monitor was sold for scrap, and was scuttled as a breakwater off Half Moon Bay. The wreck became a popular site for scuba diving and picnics over the years, but there was a structural collapse in 1993. There have been several campaigns to preserve the ship (one of which is ongoing), as she is one of the last monitors, the only surviving ship of the Australian colonial navies, and one of only two surviving ships in the world with Coles turrets.

Named for Cerberus, the three-headed guard dog of Hades from Greek mythology, Cerberus was the first of the breastwork monitors, which differed from previous ironclad warships by the fitting of a central superstructure containing rotating turrets. The ship was designed by Edward James Reed, Chief Constructor to the Royal Navy. Cerberus had one sister ship, HMS Magdala, and an additional five ships of similar design (HMS Abyssinia and the four Cyclops class monitors) were constructed for coastal defence around the British Empire. These seven vessels were unofficially referred to as the 'Monster class'.

The monitor was 225 feet (68.6 m) long, 45 feet 1 inch (13.7 m) wide, and with a draught of 15 feet 6 inches (4.7 m). Cerberus had a freeboard of 4 feet (1.2 m), while her breastwork extended 7 feet (2.1 m) above the deck, and was 112 feet (34 m) long. She had a standard ship's company of 12 officers and 84 sailors, with an additional 40 to man the ship in wartime. Cerberus had a maximum speed of 9.75 knots (18.06 km/h; 11.22 mph), with an economical speed of 6 knots (11 km/h; 6.9 mph).

Her twin screws were driven by two horizontal twin-cylinder, double-acting, simple steam engines made by Maudslay Son & Field. They had 43-inch (110 cm) bore, 27-inch (69 cm) stroke, and were provided with 30 psi (210 kPa) steam produced by five coal-fired boilers with 13 furnaces.[citation needed] The steam engines generated 1,369 indicated horsepower (1,021 kW) on trials and drove two propellers with a diameter of 12 feet (3.7 m) Cerberus was the first British warship to be solely steam-powered. The monitor had a bunkerage of 240 tons of coal; this would last just under five days at maximum speed (50 tons consumed per day), and ten days at economical speed (24 tons per day). The monitor was not suited to ocean travel.

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