RMS Mauretania (1906) launched by the Duchess of Roxburghe. At the time of her launch, she was the largest moving structure ever built, and slightly larger in gross tonnage than "Lusitania". The main visual differences between "Mauretania" and "Lusitania" were that "Mauretania" was five feet longer and had different vents. "Mauretania" also had two extra stages of turbine blades in her forward turbines, making her slightly faster than "Lusitania". "Mauretania" and "Lusitania" were the only ships with direct-drive steam turbines to hold the Blue Riband; in later ships, reduction-geared turbines were mainly used. "Mauretania"s usage of the steam turbine was the largest application
German submarine U-842 more than one hour, "U-842" was sunk by depth charges from "Wild Goose", there were no survivors. German submarine U-842 German submarine "U-842" was a Type IXC/40 U-boat built for Nazi Germany's "Kriegsmarine" during World War II. "U-842" was ordered in January 1941 from DeSchiMAG AG Weser in Bremen under the yard number 1048. Her keel was laid down on 6 April 1942 and the U-boat was launched on 14 November the same year. She was commissioned into service under the command of "Kapitänleutnant" Wolfgang Heller (Crew 30) in 4th U-boat Flotilla on 1 March 1943. German Type IXC/40 submarines