As the world turns so does stuff turn up:
https://www.faaaa.asn.au/mystery-photo-no-47-answer/ "...The device circled in yellow is a Sea Venom nose (complete with radar) on the rear of the island just below the big radar aerial. It was there to perform as an SCA (Ship Controlled Approach) radar for the returning Venoms and Gannets.... On board ship, the lock-on and the general search modes were not stabilised, so the pitch and roll of the ship made the adoption of a glide slope very difficult. The device only appears in photographs between 1959 and 1963 or thereabouts, and may therefore have been installed during Melbourne’s August
1959 refit at Garden Island....
MAX SPEEDY" - PDF attached says more about
RN initial invention c.1957
