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-868 was then transferred to Loch Ryan 30 May 1945 for Operation Deadlight, where a large number of U-boats were sunk in one operation. German submarine U-868 U-868 was a Type IXC/40 U-boat of Nazi Germany's "Kriegsmarine" in the Second World War. The ship was ordered on 25 August 1941 and laid down on 11 March 1943. She was launched on 18 August 1943, at Bremen, Germany. She had two commanders over her operational lifespan, for the period from 23 December 1943 until 21 July 1944 it was "Kapitänleutnant" Dietrich Rauch, then "Oberleutnant zur See" Eduard Turre for the period from