Admiralty
It evolved from *Admiralty Navy War Council, (1909–1912) which in turn became the Admiralty War Staff, (1912–1917) before finally becoming the Admiralty Naval Staff in 1917. It was the former senior command, operational planning, policy and strategy department within the British Admiralty. It was established in 1917 and existed until 1964 when the department of the Admiralty was abolished, and the staff departments function continued within the Navy Department of the Ministry of Defence until 1971 when its functions became part of the new Naval Staff, Navy Department of the Ministry of Defence.
RAF Coastal Area
Despite the fact that Britain had been caused severe difficulty by the U-boat campaign in the First World War, the Admiralty completely ignored the threat of the submarine until the late 1930s. The Royal Navy had founded its traditional defensive strength on the battleship, which was used to defend its waters and merchant fleets. This weapon had proved incapable of countering U-boats during the war. The Admiralty also ignored the damage caused by submarines and regarded them as ineffective defensive weapons. Given the disarmament of Germany there seemed little offensive threat. Even after the rise of Adolf Hitler and the birth of the "Third Reich", there seemed little inclination or will toward rearming Britain's ASW air forces. To the contrary, the Anglo-German Naval agreement signed in June 1935, allowed the Germans to build German U-boat strength to one-third the displacement tonnage of the entire Royal Navy. In fact, the Germans had been developing submarines as early as 1922, despite the Treaty of Versailles and the banning of German military submarines.