The Mobile Radar Unit (MRU) was the first form of radar in use at North Cairn. It would have consisted of a convoy of 10 vehicles, with tents, power generator, workshops, and a field kitchen. Two large trailers would carry the Transmitter and Receiver equipment, while the 75-foot masts would travel in several parts on four-wheeled trailers.
(image: mobile radar unit © IWM CH 15200)