Unlikely Collision

Following up on this post, the Agence France Presse is reporting that USS San Francisco collided with an uncharted undersea mountain.

The nuclear-powered US submarine that ran aground in the Pacific last week, causing the death of a sailor and injuring 23 others, ran head-on into an undersea mountain that apparently was not on the navy's charts, a US defense official said Tuesday.

The USS San Francisco, a Los Angeles-class attack submarine, arrived at its home port in Guam under its own steam Monday as the navy investigated the mishap.

Having studied submarines, having taken courses on marine navigation for my Naval Science minor, and having studied satellite imaging, I find this explanation very hard to swallow.