Century-long mystery of how an American armoured warship was destroyed by a German U-
 

Century-long mystery of how an American armoured warship was destroyed by a German U-boat is SOLVED
By JOE PINKSTONE FOR MAILONLINE | UPDATED: 07:47 EST, 13 December 2018
RE: https://www.dailymail.co.uk/sciencet...-sea-mine.html

Century-long mystery of how an American armoured warship was destroyed by a German U-boat is SOLVED as experts find a sea mine sunk the vessel and killed six men
USS San Diego sunk on July 18, 1918 when it was attacked by a German U-boat
Six of the 1,117 crew on-board were killed by the attack as it sunk in 28 minutes
3D images have revealed the cause of the ship's demise as a sea mine
The 500-foot long armoured vessel remains in tact and upside down off the coast of New York even after a century under 110 feet of water

More on site with photos.