Remote Radar Head Portreath or RRH Portreath is an air defence radar station operated by the Royal Air Force. It has a coastal location at Nancekuke Common, approximately 1.25 kilometres (0.78 mi) north east of the village of Portreath in Cornwall, England. Its radar (housed in a fibre glass or golf ball protective dome) provides long-range coverage of the south western approaches to the United Kingdom.