HMS J7, Submarine in Australia

HMS J7 is a J-class submarine hulk lying in shallow water at the Sandringham Yacht Club in Port Phillip, Victoria. Its rusted, algae-covered hull runs diagonally through the water, with a rounded bow enclosed by curved ribs at one end and jagged upright plates at the other. The open interior shows cross-ribs along its length.

Ordered in May 1916 under the emergency programme, J7 was laid down at Devonport on 5 August 1916 and launched on 12 February 1917. Transferred to Australia, it was commissioned into the Royal Australian Navy on 25 March 1919. Paid off in July 1922, it was sold in 1924 and scuttled in 1930 as a breakwater at the Sandringham Yacht Club.

The wreck lies inside a stone marina built around it at the Sandringham Yacht Club on Port Phillip; removal was judged too expensive, so the hull stayed in place and is visible above the waterline. Its rusted ribs and plates now serve as a breakwater for moored yachts.

The rusted hull lies in the water at the Sandringham Yacht Club in Port Phillip, Victoria, built into a stone marina constructed around it. It was scuttled in 1930 as a breakwater and left in place because removal was too costly. The wreck is visible from the marina; the jagged ribs at one end stand above the waterline.

J7 was the only J-class boat whose conning tower sat 60 feet further aft than her sisters', because her control room was placed behind the machinery spaces. She was launched at Devonport on 12 February 1917 and later scuttled in 1930 as a breakwater at the Sandringham Yacht Club.