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Accident Report Detail

Allision of Hong Kong-Registered Containership M/V Cosco Busan With the Delta Tower of the San Francisco-Oakland Bay Bridge

Executive Summary

​On Wednesday, November 7, 2007, about 0830 Pacific standard time, the Hong Kong registered, 901-foot-long containership M/V Cosco Busan allided with the fendering system at the base of the Delta tower of the San Francisco–Oakland Bay Bridge. The ship was outbound from berth 56 in the Port of Oakland, California, and was destined for Busan, South Korea. Contact with the bridge tower created a 212-foot-long by 10-foot-high by 8-foot-deep gash in the forward port side of the ship and breached the No. 3 and 4 port fuel tanks and the No. 2 port ballast tank. As a result of the breached fuel tanks, about 53,500 gallons of fuel oil were released into San Francisco Bay. No injuries or fatalities resulted from the accident, but the fuel spill contaminated about 26 miles of shoreline, killed more than 2,500 birds of about 50 species, temporarily closed a fishery on the bay, and delayed the start of the crab-fishing season. Total monetary damages were estimated to be $2.1 million for the ship, $1.5 million for the bridge, and more than $70 million for environmental cleanup.

Contributing to the accident was the failure of Fleet Management Ltd. to adequately train the Cosco Busan crewmembers before their initial voyage on the vessel, which included a failure to ensure that the crew understood and complied with the company’s safety management system. Also contributing to the accident was the U.S. Coast Guard’s failure to provide adequate medical oversight of the pilot in view of the medical and medication information that the pilot had reported to the Coast Guard.

Probable Cause

​The National Transportation Safety Board determines that the probable cause of the allision of the Cosco Busan with the San Francisco–Oakland Bay Bridge was the failure to safely navigate the vessel in restricted visibility as a result of (1) the pilot’s degraded cognitive performance from his use of impairing prescription medications, (2) the absence of a comprehensive pre-departure master/pilot exchange and a lack of effective communication between the pilot and the master during the accident voyage, and (3) the master’s ineffective oversight of the pilot’s performance and the vessel’s progress.

Accident Location: San Francisco , CA   San Francisco Bay
Accident Date: 11/7/2007
Accident ID: DCA08MM004

Date Adopted: 2/18/2009
NTSB Number: MAR-09-01
NTIS Number: PB2009-916401