The (; abbreviated OKM) was the high command and the highest administrative and command authority of the Kriegsmarine. It was officially formed from the Marineleitung ("Naval Command") of the Reichswehr on 11 January 1936. In 1937 it was combined with the newly formed Seekriegsleitung (SKL). There were two major re-organisations, in November 1939 and May 1944. Organization The OKM was broadly divided into six sections: At the top was the Oberbefehlshaber der Marine (OBdM) – the Commander-in-Chief and his staff, with responsibility for liaison with the OKW, and including planning, technical, engineering, medical, economic, research, propaganda and personnel departments. The Seekriegsleitung (SKL) ("Naval Warfare Command") was formed on 1 April 1937. Originally closely linked with both the OBdM and the Marinekommandoamt, with the Commander-in-Chief (OBdM) also the Chief of the SKL, and the Chief of the Marinekommandoamt doubling as the SKL Chief of Staff. From 23 August 1939 the offices were split and the Marinekommandoamt became subordinate to the SKL with its own Chief and staff. The SKL led the planning and execution of naval warfare and directed the distribution of naval forces, though during the war its authority was limited to non-domestic sea-areas, and in February 1943 when Dönitz was appointed OBdM it also lost control over U-boat operations. On 1 May 1944 the Chief of Staff of the SKL was re-designated the Chef der Seekriegsleitung. The office was then tasked with the command of fleet units operating as transports, blockade runners, auxiliary cruisers and supply shipping. The Marinekommandoamt ("Naval Command Department") was formed on 11 January 1936 with the formation of the OKM, but had previously existed in the Marineleitung since 1920. Subordinate to the Oberbefehshaber der Marine, from April 1937 the Chef des Marinekommandoamt also served as the Chief of Staff of the SKL. In mid-1939 the two offices were split and the Marinekommandoamt received a new Chief who was subordinate to the Chief of Staff of the SKL. From 1942 the office was also known as the Quartiermeisteramt and from 20 April 1943 the Chief was re-titled Admiralquartiermeister. On 1 May 1944 the office was officially re-designated the Quartiermeisteramt. As well as naval operations the Marinekommandoamt had responsibilities in manning, supply, intelligence, training, and in coastal and air defence. The Marinewaffenamt ("Naval Weapons Department") was formed in 1934, and was renamed the Marinewaffenhauptamt ("Naval Weapons Head Department") in 1939, and to Kriegsmarine-Rüstung ("Navy Armaments") in 1944,