Almost everyone who had seen the structure knew it was called the ‘Elephant Cage’ due to it’s giant circular structure. This receiving aerial was a step forward in direction finding and monitoring radio signals. Graham pointed out that there were a further eight similar aerials situated around the world enabling signals to be pinpointed almost any where on earth. The worldwide network was known collectively as ‘Iron Horse’

The construction at Chicksands began around 1960 and was completed by1962.  The outer reflecting screen had 1056 vertical steel wires supported by 96 120-foot (37 m) towers. There were three concentric rings of antenna elements. Each received radio signals from 1.5 to 30 MHz. depending on how they are tuned.

Graham covered early direction finding equipment and the nature of the signals monitored.

The structure at Chicksands was dismantled in 1996 as it was obsolete. Only a large indentation in the landscape remains.

As a PS: