The S.S. Jacob Luckenbach collided with its sister ship and sank on July 14, 1953. This vessel, which was loaded with 457,000 gallons of bunker fuel, sank in 180 feet of water approximately 17 miles west-southwest of San Francisco. It has been leaking sporadically over the years. In 2002, oil associated with several "mystery spills" was linked to this vessel.