HMS J5, Royal Navy submarine wreck in Port Phillip Bay, Victoria, Australia.
The J-class submarine rests at 39 meters depth, featuring six torpedo tubes and measuring 84 meters in length with steel hull construction.
The submarine served in the Royal Navy during World War I before joining the Royal Australian Navy in 1919 as part of a six-vessel fleet transfer.
The submarine wreck represents the maritime heritage of Victoria, documenting naval engineering advancements and military technology from the early 20th century.
Experienced divers can explore the wreck site following specific permits and regulations, considering the strong currents and depth requirements of Port Phillip Bay.
The submarine attempted to torpedo German U-86 during wartime operations, but the torpedo failed to detonate upon impact with the target vessel.
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