From the report:

"Cooling Radio Station was constructed to house the ‘Multiple Unit Steerable Antenna’ (MUSA) system developed by Friis and Feldman in the 1930s... During the last stage of shortwave transatlantic communication prior to the rise of satellites, an experimental shortwave receiving system was constructed at Cooling. The ‘Multiple Direction Universally Steerable Aerial System’ (MEDUSA) had the potential to be the next major development in global shortwave communication." (1)

The full history of the site, the technology and the development of the experimental apparatus has been detailed. The system hut was located between the two arrays. (2)

<1> English Heritage, 2010, Cooling Radio Station, Hoo Peninsula, Kent: An Introduction (Unpublished document). SKE16235.

<2> English Heritage, 2010, Cooling Radio Station, Hoo Peninsula, Kent: An archaeological investigation of a short-wave receiving station (Monograph). SKE25193.