Washington PostSunken Steam Ship: Sonar Maps 1888 ShipwreckSky NewsSixteen people were killed after the steam ship City of Chester collided with the larger RMS Oceanic in a dense fog in 1888. 10:08pm UK, Wednesday 23 April 2014. Pic: NOAA. Scientists used a multi-beam sonar system to create the image. Pic: NOAA.