Fleet Management Ltd. pleaded guilty to charges of obstruction, making false statements and negligent discharge of oil, and agreed to pay a $10 million fine under a deal reached with prosecutors. A federal judge still must approve the deal.

The Cosco Busan sideswiped the San Francisco-Oakland Bay Bridge on a foggy morning on Nov. 7, 2007. The ship spilled 53,000 gallons of oil into the water, killing thousands of birds and other wildlife and fouling miles of shoreline.

The ship's pilot, John Cota, was sentenced in July to 10 months in prison after pleading guilty to two misdemeanor charges.

Company director Aga Nagarajan appeared in court Thursday with lawyer Marc Greenberg, who entered the guilty pleas. They declined comment outside court.

U.S. District Court Judge Susan Illston scheduled a Dec. 11 hearing to decide whether the $10 million is enough punishment.

Court documents showed the company acknowledging its crew was poorly trained and the master failed to stop the pilot from leaving port in thick fog. The master admitted he could "suffer adverse personnel consequences" if he delayed departure, according to the court filing.