Established in 1941, the Quarantine Anti-Aircraft Battery Site is the only complete gun-site of its type within the Darwin area. It is highly significant as it is of a design which was discontinued by the Defence Force in the mid 1940s and one which is unique to the Northern Territory.
The site consists of four circular concrete gun emplacements in an arc around a central command post that is also of concrete and partially underground. There are remnant concrete slabs of other buildings and ablution facilities in the area and the walls of a magazine store. The guns went into action on 13/06/1942 and again on the 15 & 16 June 1942.
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