 Originally designed by the British as underground bunkers, the Australian igloos were constructed aboveground but camouflaged with netting to disguise the buildings during active service.The place has strong or special association with a particular community or cultural group in New South Wales for social, cultural or spiritual reasons.The 131 Radar Station (former) has State significance for its social value to the NSW community and for the former RAAF and WAAAF officers who served at the site.