Underwater Mountain Collision: In 2005, the USS San Francisco, a U.S. Navy nuclear-powered attack submarine, collided with an uncharted undersea mountain at high speed near Guam.

George, Francis, Joseph, Madison, and Albert Sullivan joined the Navy together on January 3, 1942. They refused to serve ...

On Dec. 17, 1917, the U.S. submarine USS F-1 was lost at sea during a training accident off the coast of California, killing 19 crew members on board.

The USS F-1 submarine sank in seconds after it was badly damaged in a collision with another U.S. Navy submarine. Nineteen of its crew drowned in the accident, and three were rescued by the other sub.

USS San Francisco Accident. ... In 2005, a U.S. Navy attack submarine collided head-on with an undersea mountain at more than thirty miles an hour. Despite ...