A gun emplacement or possible light anti aircraft battery, probably dating to the Second World War, is visible as very slight earthworks on aerial photographs and has been mapped as part of the English Heritage: Hoo Peninsula Landscape Project. The site comprises a rougnhly rectangular enclosure about 11.3m by 10m, with a possible weapons pit to the east and an outlying bank to the south. It is located on Hoo Common near a Second World War military camp), and may be associated with it. Several other gun emplacements and slit trenches are located in the immediate vicinity. Alternatively, the earthworks could be associated with First World War practice trenches and redoubts in the same area. This part of Hoo Common is noted on a War Department map of Lodge Hill field defences, 1914-16, as part of the New field works ground, the greatest extent of which (Monument 1545095) was located to the west, below Chattenden Barracks.