The wreck of Australia's first naval submarine has been found after a 103-year search, BBC reports.
The HMAS AE-1 was the first Allied submarine lost in World War I, vanishing off Rabaul, Papua New Guinea with 35 Australian and British crewmates onboard in 1914.
The thirteenth search mission for the vessel found it in waters off the Duke of York islands in Papua New Guinea.
The discovery solves Australia's oldest naval mystery, the government said.
