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-563 crash-dived. On her most successful day, 12 April 1943, the boat sank the "Pacific Grove" and damaged the "Fresno City" southeast of Cape Farewell (Greenland). The "Fresno City" was sunk later that day by . "U-563" also sank the Dutch ship "Ulysses" in the same area. The boat left Brest for the last time on 29 May 1943. On the 31st, she was sunk by two British Handley Page Halifaxes of 58 Squadron and an Australian Sunderland flying boat of No. 228 Squadron RAF. Forty-nine men died with "U-563"; "U-563" took part in nine wolfpacks, namely. German submarine U-563 German