German submarine U-99 was a Type VIIB U-boat of Nazi Germany's Kriegsmarine during World War II. She was laid down on 31 March 1939 at the Friedrich Krupp Germaniawerft in Kiel as yard number 593. She was launched on 12 March 1940 under the command of Korvettenkapitän Otto Kretschmer and was assigned to the 7th U-boat Flotilla based in Kiel and later in St Nazaire.

The second SS Laurentic was a 18,724 GRT steam ocean liner built in 1927 by Harland and Wolff, Belfast, for White Star Line. She was the last steamship to be built for White Star Line.