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-405 ever recovered by either side; all 49 crewmen were lost. "Borie" lost three officers and 27 crew members, and was too badly damaged by the collision to be towed to port. The next day, her crew was ordered to abandon ship and she was sunk by . "U-405" took part in nine wolfpacks, namely. German submarine U-405 German submarine "U-405" was a Type VIIC U-boat of Nazi Germany's "Kriegsmarine" during World War II. The U-boat was laid down on 8 July 1940 at the Danziger Werft shipyard at Danzig, launched on 4 June 1941 and commissioned on 17 September 1941.