Photograph. "12/15/58 -- San Francisco: The world's largest mobile offshore platform, George F. Ferris, just clears the Golden Gate Bridge here 12/15 as it heads for Los Angeles where it will assemble record-size ocean sewer pipe in 200-feet of water. Without stopping, the huge DeLong platform jacked down its 275-foot legs 57-feet to clear the bridge, then raised them to navigate an offshore shoal. The rig measures 190-feet long and 122-feet wide and weighs 4500-tons." -- caption by jgd at head of photograph.