The Port War Signal Station is located on Spurn Point, Yorkshire.
Built during World War I, as a self-contained Naval unit, with officers’ quarters and barracks, this was a station with the important role of monitoring shipping movements. All vessels entering the Humber had to give a pre-arranged signal, pennants in daytime, and lights at night. The signals were changed daily or as frequently as an hour. A series of engine / generator rooms within the Port War Signal Station complex powered large arc searchlights to guide the other defence and anti-invasion sites in the area such as gun and AA emplacements. A railway connected the port war signal station to Spurn battery and Godwin Battery.
The Port War Signal Station was also used in World War II. Towards the end the war, Wrens were stationed there. After the Navy left, the coastguards used it until they moved to Kilnsea in 1964. The ancillary buildings were demolished by the Yorkshire Wildlife Trust in 1976, and the tower itself was taken down in 1979.