Cosco Busan oil spill
The Cosco Busan oil spill occurred at 08:30 UTC-8 on 7 November 2007 between San Francisco and Oakland, California, in which 53,569 US gal (202,780 L) of IFO-380 heavy fuel oil, sometimes referred to as "bunker fuel", spilled into San Francisco Bay after the container ship Cosco Busan, operated by Fleet Management Limited struck Delta Tower of the San Francisco–Oakland Bay Bridge in thick fog. Investigators found that maritime pilot John Cota was impaired because of his use of prescription pharmaceuticals while piloting the container vessel, which rendered him unable to use the onboard radar and electronic navigation charts correctly.