Fog in San Francisco Bay was so thick when the Cosco Busan incident occurred that ports in any other part of the world would have been closed, the ship's master, Capt Mao Cai Sun, told investigators. The ship hit the Oakland Bay Bridge on 7 November 2007, spilling 200 tonnes of oil. In his statement, the captain said that pilot John Cota stopped using the radar and relied on an electronic chart viewer to navigate under the bridge, according to news reports.
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