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-147 (1940) On 2 June "U-147" encountered convoy OB-239 near the African coast and attacked alone (a decision which historian Clay Blair described as "bold"). She damaged one ship, ("Mokambo"), before being sunk with all hands by a British destroyer, and a corvette, . German submarine U-147 (1940) German submarine "U-147" was a Type IID U-boat of Nazi Germany's "Kriegsmarine" during World War II. She was laid down on 10 April 1940 at Deutsche Werke in Kiel as yard number 276, launched on 16 November 1940 and commissioned on 11 December under the command of "Kapitänleutnant" Reinhard Hardegen. German Type IID submarines