The Sea Fort Red Sands was built in the Thames estuary in 1943 in order to fight off enemy air raids. After the Second World War, however, they fell into oblivion. First because they are located in the middle of the sea, second because of their high maintenance and disarmament costs the government was not willing to pay anymore. From time to time they appear in the media, but mostly with negative headlines like ship collision or illegal occupation through pirate radio stations. The master's degree-thesis documents the equipment and the strategically compilation of the Red Sand Towers, their use and function during the Second World War, the biography of their creator Guy Maunsell as well as statics, construction and building methods. The analysis focuses on the current condition of the towers and shows new maintenance capabilities. Finally a new concept for their future use is presented. Comparable properties intend to show, that this initiates a positive development and guarantees a sustainable use.