The German Naval Intelligence Service (German: Marinenachrichtendienst) (MND) was the naval intelligence department of the Germany Navy and had a long history, going back to the naval aspirations of German Emperor, Wilhelm II in 1899.
The department had various names throughout its existence. Between 1901 and 1919, the service was called the Nachrichten-Abteilung also known as N (English:News Department) and was the naval intelligence service of the Imperial German Navy. It focused its efforts on France, the United States and above all the United Kingdom, whose Royal Navy was Germany's principal rival for naval supremacy. Its activities had little practical impact on the course of the First World War and it was dissolved in 1919 after Germany's defeat in the war. After the war, saw the establishment of the observation service (B-Dienst) in 1918–1919. In spring 1925, the Naval Intelligence Division was disbanded and didn't reform until October 1934 under Theodor Arps when it was named Marinenachrichtendienst (English: Naval Intelligence Service). During the Second World War, the service underwent various re-organizations, starting as part of 2/SKL, later 4/SKL of the Oberkommando der Marine (OKM) and finally dissolved on 22 July 1945, 2 months after the end of hostilities.
After the Admiralstab was established in 1899, its chief, Vice-Admiral Otto von Diederichs, sought to establish a naval intelligence department. He petitioned Kaiser Wilhelm II in January 1900 to approve the project. Although the Kaiser approved, Diederichs' plans were blocked by Admiral Alfred von Tirpitz of the German Imperial Naval Office, with whom he had previously clashed over plans to expand the authority of the Admiralstab. Tirpitz simply declined to answer Diederichs' request for funds, prompting the latter to approach the Kaiser again in January 1901.