Grille was an aviso built in Nazi Germany for the Kriegsmarine (literally 'War Navy') in the mid-1930s for use as a state yacht by Adolf Hitler and other leading individuals in the Nazi regime. The ship received a light armament of three 12.7-centimeter (5 in) guns and was fitted to be capable of serving as an auxiliary minelayer. Completed in 1935, her experimental high-pressure steam turbines, which were installed to test them before they were used in destroyers, required significant modifications and the ship finally entered service in 1937. Over the next two years, she was used in a variety of roles, including as a training vessel and a target ship, in addition to her duties as a yacht.