HMAS AE1 was Australia's first WWI submarine, which mysteriously vanished in 1914, becoming the country's greatest naval mystery for over a century. After a 103-year search, the submarine was finally ...

Decades before Tom Clancy wrote “The Hunt for Red October,” an Italian naval officer pulled off a stunt that could have come straight from a Cold War spy novel — he stole a submarine to spark a war.

A group of divers have explored the wreckage of a WW1-era Royal Navy submarine 100 years after it sank. Dominic Robinson, 54, and a team of 10 dived 74m down to check out the century-old HMS M1 sub 20 ...