http://www.bbc.co.uk/news/world-asia-40310563(Admin) Quote from BB news:"What happened?
The collision occurred near Yokosuka, a Japanese port city that is home to the US 7th Fleet, which comprises up to 80 submarines and ships and including the USS Fitzgerald.
It is unclear where the 154-metre (505ft) guided missile destroyer ship was heading at the time.
The ACX Crystal, a 222-metre (730ft) Filipino-flagged container ship, was travelling between the Japanese cities of Nagoya and Tokyo.
Marine traffic records suggest the ACX Crystal made a sudden U-turn roughly 25 minutes before the collision with the USS Fitzgerald. It is not clear why it changed course.
Marine traffic records suggest it was travelling at 14.6 knots (27km/h) at the time of the collision."
It doesn't look much like an accident to me , the container ship did 2 180' course changes and left the warship to her fate by the looks of this, crewed by Philippines personnel I think and they have been suffering from serious Islamic State attacks recently