The German destroyer Z1 Leberecht Maass was the lead ship of her class of four destroyers built for the German Navy (initially called the Reichsmarine and then renamed as the Kriegsmarine in 1935) during the mid-1930s. Completed in 1937, two years before the start of World War II, the ship served as a flagship and spent most of her time training, although she did participate in the occupation of Memel in early 1939. Several days after the start of the war in September 1939, Z1 Leberecht Maass and another destroyer unsuccessfully attacked Polish ships in the naval base on the Hel Peninsula. She was lightly damaged during the action. In mid-February 1940, while proceeding into the North Sea to attack British fishing trawlers (Operation Wikinger), the ship was bombed by a patrolling German bomber that damaged her steering. Following the attack, Z1 Leberecht Maass broke in half and sank with the loss of most of her crew. A court of inquiry convened during the war determined that she and a sister ship were hit by bombs, but a post-war investigation determined that she had drifted into a newly laid British minefield. Design and description Design work on the Type 34-class destroyers began in 1932, despite the limit imposed by the Versailles Treaty that had ended World War I. Initial designs were for large ships more powerful than the French and Polish destroyers then in service, but the design grew as the Reichsmarine now expected it to serve as a small cruiser. The design work appears to have been rushed and not well-thought out as the short forecastle and lack of flare at the bow compromised the ships' seakeeping ability and their stability was inadequate. The only real innovative part of the design, the high-pressure boilers, were an over-complicated system that received almost no shipboard testing before being installed in the Type 34s and frequently broke down throughout the life of the ships. The class had an overall length of and were long at the waterline. The ships had a beam of , and a maximum draft of . They displaced at standard load and at deep load. The two Wagner geared steam turbine sets, each driving one propeller shaft, were designed to produce using steam provided by six Wagner boilers. The ships had a designed speed of , but their maximum speed was . The Type 34s carried a maximum