The USS F-1 submarine, sunk in 1917, has been discovered and mapped in 3D using advanced technology at a depth of 1,300 feet.

According to international media, the vessel lies at a depth of approximately 1,300 feet to the west of San Diego.

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 ...

Introduction -- State of play -- Beat to quarters -- Aloft -- "Drab efficiency" : the making of the convoy system -- Sending the hunters -- Battleship boys -- Keeping the seas -- Chasers -- Barrages, ...