Sonar technology has changed the way we understand history. By using sound waves, we are able to "see" underwater, develop nautical charts, and map objects below the surface. 🗺️📍 In the search for the sunken SS City of Chester, this team of maritime investigators is scanning the seafloor of the San Francisco Oakland Bay to uncover fascinating remnants of the shipwreck, regarded as the worst ever maritime tragedy at the Golden Gate. Using this data, researchers are able to determine what caused