A Second World War trapezoidal compound within a double barbed wire enclosure located adjacent to the beach to the south of the Wing Battery (19th century battery) on the Isle of Grain. Within the enclosure are a number of small buildings including an electric searchlight (in use between 1911 and 1940), a generator and fuel supply for the searchlight, a tower and another pair of unidentified structures within a square fenced enclosure. It is not clear which parts of the complex were in use when the site was photographed by the RAF in 1942, but the barbed wire enclosure is a wartime feature. These were all mapped from aerial photographs as part of the English Heritage: Hoo Peninsula Landscape Project. These sites have been recorded separately in individual NMR Monument records.