Boat explodes in Richardson's Bay, injuring occupant Bay City News Service FacebookTwitterEmail A 35-foot sailboat exploded on Sunday, injuring the man inside it before he was rescued by first responders off the Sausalito shoreline. Authorities are investigating the cause of the explosion, but they suspect that the Foulie Douce -- or tender madness -- was the victim of a propane gas leak as it sat in Richardson's Bay. Mark Culver, the occupant, was taken to a hospital for burns and minor injuries, but his current status was not disclosed. Richardson's Bay Regional Agency Harbormaster Curtis Havel said he will attempt to contact Culver and discuss housing options, and that he is working with the Southern Marin Fire Protection District to help determine the explosion's cause.