Crew members stationed aboard the Coast Guard Cutter Aspen, homeported at Yerba Buena Island in San Francisco, recover the buoy that marked the safe-water entrance of San Francisco Bay Sept. 26, 2011. The buoy sank Sept 24, 2011, and had to be found and drained of water before it could be lifted completely out of the water. U.S. Coast Guard photo by Ens. Anna Mueller.