A Second World War military installation can be seen on aerial photographs taken in 1946. This site, which was built on the south coast of the Isle of Grain consisted of a number of widely dispersed buildings interconnected by a narrow roadway. The roadway widens out at each building suggesting that vehicles could either by-pass or enter the building. The narrowness of the roadway meant that a number of lay-bys were included in the layout. This site was connected to the coast road at three points and this road also joined with the railway at Port Victoria, to the south west, indicating that some stores came via the railway. The 1946 photographs also suggest that some of the hard standing around Horseshoe Point were also used for stores (the remains of the demolished RNAS seaplane station, see NMR 1488177). The 1947 photographs show that the field to the south west, although without any buildings, was also used for widely dispersed storage, most of which had been removed by 1951. The dispersed nature of this storage in both these areas and the proximity to a jetty on the Medway suggests some form of armaments were kept there for the Royal Navy. The majority of the south western site was destroyed in the construction of the post-Second World War BP oil refinery; the north-eastern corner of this site is now under Grain power station. The dispersed buildings were still present in 1966 but had been demolished by 1978. Although the main area occupied by this site has not been built upon, with the exception of two buildings that may have been part of this depot, no obvious remains are visible. This site was mapped from aerial photographs as part of the English Heritage: Hoo Peninsula Landscape Project.