Radar stations during wartime Malta, by Charles Debono, curator of the National War Museum in Valletta.

… as radar technology was in its infancy, in Malta, the British authorities decided to build an early-warning system, the Parabolic Acoustic Mirror known as Il-Widna (ear), constructed at Ta’ San Pietru, Maghtab.

Il-Widna became outdated when the British government decided to install the first RDF [Radio Directing Finding] in Malta. It is important to say that this was to be the first RDF installed outside the UK.

More at the Times of Malta website