The U.S. Coast Guard Sector San Francisco received notification from the Motor Vessel WILLIAMSBURG BRIDGE through the Vessel Traffic Service that the vessel lost propulsion while transiting through San Francisco Bay just before 4:30 p.m. yesterday (February 14) afternoon. The vessel immediately took proper precautionary measures by safely anchoring within the shipping channel in less than five minutes. The Coast Guard, San Francisco Police Department Marine unit and two tug boats safely escorted the vessel, which was able to restart its main propulsion engine, to Anchorage Nine where the vessel is currently anchored. All appropriate notifications were made in a timely and proper manner.