Australia’s most-enduring naval mystery was solved this week with the discovery of its first submarine, which went missing off the coast of Papua New Guinea in the opening weeks of World War I.
HMAS AE1 disappeared on Sept. 14, 1914, after a successful mission to help capture the territory then known as German New Guinea. It had been in service just seven months.
The submarine went down with 35 men onboard. AE1 was the first Allied submarine lost in the First World War and the first ship lost by the Royal Australian Navy.
AE1, which had a crew made up of men from Australians, New Zealand and Great Britain on board, was found in nearly 1,000 feet of water, off the coast of the Duke of York Islands, in east Papua New Guinea.
“After 103 years, Australia’s oldest naval mystery has been solved,” Defense Minister Marise Payne told reporters in Sydney. “This is one of the most significant discoveries in Australia’s naval maritime history… The loss of AE1 in 1914 was a tragedy for our then fledgling nation.”
The expedition that discovered the sub was the 13th search for the craft since 1976. AE1 was found by the search vessel Fugro Equator, which was also used by Australia to hunt for missing Malaysia Airlines flight MH370.
The official cause behind the loss of AE1 has yet to be determined. However, retired Rear Admiral Peter Briggs, who worked on the search, told The Australian that he believed the cause was most likely “a diving accident,” according to a story in The Guardian.
“The submarine appears to have struck the bottom with sufficient force to dislodge the fin from its footing, forcing it to hinge forward on its leading edge, impacting the casing,” he said.
A small commemorative service was held upon the discovery of AE1 by those aboard the search vessel, and descendants of the crew will be notified of the finding.
“For Navy, it demonstrates the persistence of a view that fellow mariners always have – that is, we always seek to find those who have sacrificed so much for our country [so they can] actually lay to rest,” said Royal Australian Navy Vice Admiral Tim Barrett.
(Top: AE1, foreground, with other Australian ships off Rabaul on Sept. 9, 1914, less than a week before it sank.)