High Quality Content by WIKIPEDIA articles! The Brummer class were a group of two light mine-laying cruisers built for the Imperial German Navy in World War I. When the war broke out the Germans had only two older mine-laying cruisers: Albatross and Nautilus. Although most German cruisers were fitted for mine-laying, a need for fast specialized ships existed. The Imperial Russian Navy had ordered a set of steam turbines for the Borodino-class battlecruiser Navarin from the AG Vulcan shipyard in Stettin. This machinery was confiscated on the outbreak of war and used for these ships. Both vessels were built by AG Vulcan.